SPace Acronym DatabasE
SPADE is a work-in-progress and perhaps always will be :)
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Last updated: 2026-05-22 14:34
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| Term | Description |
|---|
| (CC)PCB | (Commercial Crew) Program Control Board |
| (E)-ORU | EVA-compatible ORU |
| (R)-ORU | Robotics-compatible ORU |
| 21CSLC | 21st Century Space Launch Complex |
| 2BL | double-sided phase locked loop noise bandwidth |
| 2BL | double sideband noise bandwidth |
| 2FA | Two-Factor Authentication |
| 3CS | 3 Corner Satellite |
| 3D ROCS | 3D Based Rover Operations Control System |
| 4BMS | four-bed molecular sieve |
| 4M | Manfred Memorial Moon Mission |
| 8B/10B | 8-bit/10-bit |
| 8PSK | phase shift keying of 8 states |
| 8PSK | phase shift keying of eight states |
| @ | at |
| A | ampere |
| A | Application Satellite |
| A&A | Astronomy & Astrophysics |
| A&C | Activation & Checkout |
| A&C,ACO | Activation & Checkout (e.g.,Activation is a series reconfigurations and checkouts performed once Dragon has reached orbit.) |
| A-MKO | ATV Mission Kick Off |
| A/D | analog to digital |
| A/D | Analog/Digital |
| A/D | analogue-to-digital |
| A/D | analogue to digital |
| A/D,AtoD | analog-to-digital |
| A/E | Ascent/Entry |
| A/G | Air to Ground |
| A/G | Air-to-Ground (voice) |
| A/S | artificial flavor |
| A/S | artificial sweetener |
| A5 | Ariane 5 |
| AA | Accelerometer Assembly |
| AA | Associate Administrator |
| AAA | Assistant Associate Administrator |
| AAA | Avionics Air Assembly |
| AAAC | Astronomy & Astrophysics Advisory Committee |
| AACB | Aeronautics and Astronautics Coordinating Board |
| AACP | Astronaut Activity Coordination Panel |
| AAD | area array device |
| AAD | Automatic Activation Device |
| AAL | ATM Adaptation Layer |
| AAM | Advanced Avionics Module |
| AAO | Anglo-Australian Observatory |
| AAP | Americom Asia Pacific |
| AAS | Any Attitude Separation |
| AAS | American Astronautical Society |
| AAU-Cubesat | Aalborg University Cubesat |
| AAVSO | American Association of Variable Star Observers |
| ABBE | Adaptive Base Band Equalizer |
| ABC | Audio Bus Coupler |
| ABC | Airway,Breath,Circulation |
| ABC | Airway,Breathing,Circulation |
| ABCL | As Built Configuration List |
| ABF | Arraying and Beamforming |
| ABIE-TLV | Airborne Interceptor Experiment - Target Launch Vehicle |
| ABM | apogee boost motor |
| ABP | Audio Belt Pack |
| ABPC | Automatic Blood Pressure Cuff |
| ABPM | Automatic Blood Pressure Monitor |
| ABR | Available Bit Rate |
| ABRES | Advanced Ballistic Re-Entry Systems |
| ABRIXAS | A Broadband Imaging X-Ray All-Sky Survey |
| AC | Atmospheric Corrector |
| AC | Accomplishment Criteria |
| AC | Atlas Centaur |
| AC | Assembly Compartment |
| AC | alternating current |
| AC | Attitude Control |
| AC | Assembly Complete |
| AC mode | Attitude Control mode |
| AC/DC | alternating current/direct current |
| ACA | Associate Contractor Agreement |
| ACBM | active common berthing mechanism |
| ACBSP | assembly complete baseband signal processor |
| ACC | Access Control Center |
| ACCA | Automatic Cloud Cover Assessment |
| ACCESS | Advanced Communications Capabilities for Exploration and Science Systems |
| ACCESS | Advanced Collaborative Connections for Earth System Science |
| ACD | Artemis Campaign Development |
| ACE | Advanced Composition Explorer |
| ACE | Array Combining Experiment |
| ACES | Advanced Crew Escape Suit |
| ACES | Atomic Clock Ensemble in Space |
| ACESE | attitude control & energy storage experiment |
| ACI | Approach Corridor Initiation maneuver |
| ACI | maneuver,Approach Corridor Initiation maneuver |
| ACIT | ATV Cargo Integration Team |
| ACK | acknowledge |
| ACK | acknowledgement |
| ACK | Acoustic Countermeasures Kit |
| ACLS | Advanced Cardiac Life Support |
| ACLS | Advanced Closed Loop System |
| ACNT | Advanced Navigation and Communication Technology |
| ACO | Assembly,Activation&Checkout Officer |
| ACO | Activation & Checkout |
| ACO | Administrative Contracting Officer |
| ACOM | Assembly, Check-out, Operations, Maintenance, & Configuration |
| ACP | Attitude Controlled Platform |
| ACQ | Acquisition |
| ACRFG | assembly complete radio frequency group |
| ACRIM | Active Cavity Radiometer Irradiance Monitor |
| ACRIMSAT | Active Cavity Radiometer Irradiance Monitor Satellite |
| ACRIMsat | Active Cavity Radiometric Irridiance Monitor Satellite |
| ACRS | Automated Conflict Resolution System |
| ACRSF | ACR Status File |
| ACRV | Assured Crew Return Vehicle |
| ACRV | advanced crew return vehicle |
| ACRV | Assured Crew Return Vehicle (or) Astronaut Crew Rescue Vehicle |
| ACS | Attitude Control System (smaller thrusters) |
| ACS | atmosphere control & supply |
| ACS | attitude control system |
| ACS | assembly contingency subsystem |
| ACS | Advanced Communications Services |
| ACS | Advanced Camera for Surveys (Hubble Space Telescope instrument) |
| ACS3 | Advanced Composite Solar Sail System |
| ACT | Activate,activation |
| ACT | Advanced Component Technologies |
| ACT | Activation |
| ACT | advanced communications tower |
| ACT | Autopilot Control Table |
| ACT-Light | ATV Crew Trainer |
| ACTFL | American Council on the Teaching of Foreign Language |
| ACTIVE | active control word |
| ACTL | Automated Compatibility Test Lab |
| ACTS | Advanced Communication Test Satellite |
| ACTS | Advanced Communication Technology Satellite |
| ACT_LS | active least significant |
| ACT_MS | active most significant |
| ACU | arm computer unit |
| ACWP | Actual Cost of Work Performed |
| AD | Attitude Determination |
| AD | Analog to Digital |
| AD | Air Density |
| AD | audio dosimeter |
| AD | Applicable Document |
| ADA | Americans with Disabilities Act |
| ADACS | Attitude Determination And Control System |
| ADAM | Able deployable articulated mast |
| ADAP | Astrophysics Data Analysis Program |
| ADAS | Ambulatory Data Acquisition System |
| ADC | analogue digital converter |
| ADC | analogue-to-digital converter |
| ADC | acquisition data counter |
| ADCAR | Astrophysics Data Curation & Archival Research |
| ADCO | Attitude determination & Control Officer |
| ADCS | attitude determination and control subsystem |
| ADD | Architecture Definition Document |
| ADEOS | Advanced Earth Observation Satellite |
| ADFRF | Ames-Dryden Flight Research Facility (now DFRC) (NASA) |
| ADM | Atmospheric Dynamics Mission |
| ADMIN | Administration |
| ADOP | Attitude Dilution of Precision |
| ADP | Automated Data Processing |
| ADP | Architecture Decision Point |
| ADP | Acceptance Data Package |
| ADPCM | Adaptive Differential Pulse Code Modulation |
| ADPE | Automated Data Processing Equipment |
| ADS | Astrophysics Data System |
| ADS | Airbus Defense & Space |
| ADS | Advisory and Directive System |
| ADS | Attitude Determination System |
| ADS | Attitude Determination Software |
| ADS | Action Document Summary |
| ADT | Adaptation Data Table |
| ADU | Acquisition Data Unit |
| AE | ellipsoid,approach ellipsoid |
| AE | Approach Ellipsoid |
| AE | Atmospheric Explorer / Aeronomy Explorer |
| AEC | Avionics Equipment (Electrical) Chains |
| AEFTP | Ascent/Entry Flight Technique Panel (Space Shuttle Program) |
| AEHF | Advanced Extremely High Frequency |
| AEHF | Advanced Extreme High Frequency Satellite |
| AEM | Application Explorer Mission |
| AEMC | Advanced Environmental Monitoring and Control |
| AEN | Änderungsantrag used in the EADS-ST in-house CMDB (SAP) for tracking of changes & releases |
| AEP | Agency Execution Plan |
| AEPS | Advanced Electric Propulsion System |
| AERCam | Autonomous Extravehicular Activity Robot Camera |
| AERCam | autonomous EVA robotic camera |
| AERIS | American Echo Research Imaging System |
| AES | air evaporation system |
| AES | Advanced Exploration Systems |
| AEVA | Advanced Extra Vehicular Activity |
| AF | Award Fee |
| AF | Air Force |
| AFA | Amonia Filter Assembly |
| AFAIK | As Far As I Know |
| AFB | Air Force Base |
| AFD | Alternate Flight Directors (loop) |
| AFDIR | automated fault detection, isolation, & recovery |
| AFE | Agency Furnished Equipment |
| AFFTC | Air Force Flight Test Center |
| AFL | Astrobiology Field Lab |
| AFOSR | Air Force Office of Scientific Research |
| AFP | Air Force Project |
| AFPS | Automated Forms Processing System |
| AFR | anchor foot restraint |
| AFRC | Armstrong Flight Research Center |
| AFRCC | Air Force Rescue Coordination Center (in Langley,Virginia) |
| AFRCC | Air Force Rescue Control Center |
| AFRL | Air Force Research Laboratory |
| AFS | Andrew File System |
| AFSCF | Air Force Satellite Control Facility |
| AFSCN | Air Force Satellite Control Network |
| AFSPC | Air Force Space Programs Command |
| AFSS | Autonomous Flight Safety System |
| AFSS | system,Autonomous Flight Safety System |
| AFT | abbreviated functional test |
| AFTS | Autonomous Flight Termination System |
| AFTS | Autonomous Flight Termination System (AFSS) |
| AFTS | system,Autonomous Flight Termination System (AFSS) |
| AGA | Anomalous Gas Analyzer |
| AGC | automatic gain control |
| AGCS | ATV Ground Control Simulator |
| AGILE | Astro-rivelatore Gamma ad Immagini Leggero |
| AGILE | Astro-rivelatore Gamma a Immagini Leggero |
| AGL | Above Ground Level |
| AGN | Active Galactic Nucleus |
| AGNS | Automated Ground Network System |
| AGO | Santiago, Chile Tracking Station |
| AGPS | Absolute GPS |
| AGS | Autonomous Ground Station |
| AGS | Antigravity suit (G-suit) |
| AGSKP | ATV Ground Segment Key Point |
| AGU | American Geophysical Union |
| AHM | ICS-EF antenna hold mechanism |
| AHS | ACU Host Software |
| AI | Artificial Intelligence |
| AI | Approach Initiation (maneuver) (SpX) |
| AI | Action Item |
| AI&T | Assembly, Integration, & Testing |
| AI&V | Assembly, Integration & Test |
| AIAA | American Institute of Aeronautics and Astronautics |
| AIAA | American Institute of Aeronautics & Astronautics |
| AIM | Aeronomy of Ice in the Mesosphere |
| AIMP | Anchored Interplanetary Monitoring Platform |
| AIP | Audio Interface Panel |
| AIPS | Astronomical Image Processing System |
| AIRS | Advanced Infrared Sounder |
| AIS | Automated Information Security |
| AIS | Automatic Identification System |
| AISI | American Iron & Steel Institute |
| AISS | Automated Information System Security |
| AIT | Assembly, Integration, & Testing |
| AIT | Assembly, integration & Test |
| AIT | Analysis and Integration Team |
| AITP | assembly, integration & test plan |
| AITS | Agency Information Technology Services |
| AIV | Assembly, Integration & Verification |
| AIVP | assembly, integration & verification plan |
| AJ | Astronomical Journal |
| AKE | absolute knowledge error |
| AKT | Anti Kickback Tool |
| AL | airlock |
| ALARA | as low as reasonably achievable |
| ALB | Automated Link Builder |
| ALBus | Advanced eLectrical Bus |
| ALC | Automatic Light Control |
| ALEXIS | Array of Low-Energy X-Ray Imaging Sensors |
| ALGO | algorithm |
| ALHAT | Autonomous Landing & Hazard Avoidance Technology |
| ALI | Advanced Land Imager |
| ALI | Advance Land Imager |
| ALIGN | align control word |
| ALM | additive layer manufacturing |
| ALMS | Automated Logistics Management System |
| ALO | Airlock Outfitting |
| ALOS | Advanced Land Observation Satellite |
| ALOS | Advanced Land Observing Satellite |
| ALPO | Association of Lunar & Planetary Observers |
| ALQT | Assembly Level Qual Test |
| ALS | Advanced Life Support |
| ALS | Advanced Launch System |
| ALSP | advanced life support pack |
| ALSS | autonomous life support system |
| ALSYS | Airlock Systems |
| ALT | altitude |
| ALTEC | ASI Logistics & Technology Engineering Center |
| ALTIUS | Atmospheric Limb Tracker for Investigation of the Upcoming Stratosphere |
| ALTV | Approach & Landing Test Vehicle |
| AM | amplitude modulation |
| AM | Asset Manager |
| AM&O | Agency Management and Operations |
| AM0 | air mass 0 (zero) |
| AMAO | Advanced Mission Analysis Office |
| AMC | Access Management Center |
| AMC | Americom |
| AMCL | As-Maintained Configuration List |
| AME | absolute measurement error |
| AMEE | Advanced Mission Evaluation Environment |
| AMERD | Astronauts Medical Evaluation Requirements Docume |
| AMERD | Astronauts Medical Evaluation Requirements Document |
| AMICIST | Auroral Microphysics & Ion Conics Investigation of Space & Time |
| AMMI | Asset Management /Maintenance Improvement |
| AMMOS | Advanced Multi-Mission Operations System |
| AMMP | Aircraft Maintenance & Modification Program |
| AMO | Agency Management & Operations |
| AMOS | Affordable Modular Optimized Satellite |
| AMOS | Automated Mission Operations System |
| AMP | ambulatory medical pack |
| AMPEV | Airlock-unique Manual PEV |
| AMPM | Agency Mission Planning Manifest |
| AMPM | Agency Mission Planning Model |
| AMPS | Advanced Modular Power System |
| AMPTE | Active Magnetospheric Particle Tracer Explorer |
| AMPTS | Automated Mission and Payload Tracking System |
| AMS | Advanced Meteorological Satellite |
| AMS | Administrative Messaging System |
| AMS | Automated Messaging System |
| AMS | Antenna Management System |
| AMS | Alpha Magnetic Spectrometer |
| AMSAT | Amateur Satellite |
| AMSC | American Mobile Satellite Corporation |
| AMSR | Advanced Microwave Scanning Radiometer |
| AMSR-E | Advanced Microwave Scanning Radiometer for the Earth Observing System |
| AMSR-E | Advanced Microwave Scanning Radiometer for EOS |
| AMSU | Advanced Microwave Sounding Unit |
| AMSU | Advance Microwave Sounding Unit |
| AMYL | A-Amylase |
| AN | Ascending Node |
| ANASIS | Army / Navy / Air Force Satellite Information System |
| ANCC | Alternate Network Control Center |
| AND | Alphanumeric Display |
| ANDE | Atmospheric Neutral Drag Experiment |
| ANDESITE | Ad-Hoc Network Demonstration for Extended Satellite-Based Inquiry & Other Team Endeavors |
| ANGELS | Automated Navigation & Guidance Experiment for Local Space |
| ANGELS | Argos Neo on a Generic Economical & Light Satellite |
| ANI | Automatic Number Identification |
| ANITA | Analysing Interferometer for Ambient Air |
| ANL | Argonne National Laboratory |
| ANNA | Army, Navy, NASA, Air Force |
| ANR | active noise reduction |
| ANS | Astronomical Netherlands Satellite |
| ANSI | American National Standards Institute |
| ANT IFL | Antenna Interfacility Link |
| AO | ASUSAT Oscar |
| AO | Authorizing Official |
| AO | Amsat Oscar |
| AO | Announcement of Opportunity |
| AO | Arsene Oscar |
| AOA | Angle Of Attack |
| AOA | Abort Once Around |
| AOA | Abort Once Around (Shuttle abort plan) |
| AOA | Abort-Once-Around |
| AOC | Axes of Command |
| AOC | auto orthogonality check |
| AOCS | Attitude & Orbit Control System |
| AOCS | Attitude and Orbital Control System |
| AOCSM | Alternate Organization Computer Security Manager |
| AOI | automated optical inspection |
| AOPNS | Activity and Outage Posting Notification System |
| AOPS-CM | ATV Ops Configuration Management |
| AOPS-PA | ATV Ops Product Assurance |
| AOQ | average outgoing quality |
| AOR | Axes of Resolution |
| AOR | Atlantic Ocean Region |
| AOS | Advanced Orbiting System |
| AOS | Acquisition Of Signal |
| AOSAT | Asteroid Origins Satellite |
| AOSO | Advanced Orbiting Solar Observatory |
| AP | attached payload |
| AP | Application Processor |
| AP | Automated Procedure |
| APA | Allowance for Program Adjustments |
| APA | Antenna Pointing Assembly |
| APAS | androgynous peripheral attachment system |
| APAS | androgynous peripheral attach system |
| APD | Avalanche Photo Diode |
| APDS | autonomous peripheral docking system |
| APE | absolute performance error |
| APEX | Advanced Photovoltaic and Electronic Experiment |
| APEX | Advanced Photovoltaic & Electronic Experiment |
| APEX-IK | Active Plasma Experiment Interkosmos |
| APFR | restraint,articulating portable foot r. |
| APFR | articulating portable foot restraint |
| APG | Annual Performance Goal |
| API | Application Program Interface |
| API | Application Programming Interface |
| APID | Application Process Identifier |
| APID | Application Identifier |
| APL | Applied Physics Lab |
| APL | Applied Physics Laboratory (Johns Hopkins University) |
| APL | Average Picture Level |
| APLA | Advanced Payload Laptop Application Meeting |
| APM | Attached Pressurized Module (a.k.a. Columbus) |
| APM | Attached Pressurized Module |
| APMC | Agency Program Management Council |
| APMM | Agency Planning Mission Model |
| APO | Attached Phase Operations |
| APOCC | Automated Project Operations Control Center |
| APP | Annual Performance Planning |
| APP | a posteriori probability |
| APP | Approach |
| APPEL | Academy of Program/Project & Engineering Leadership |
| APRA | Astrophysics Research & Analysis |
| APRET | Astrophysics Research & Enabling Technology program (replaces APRA) |
| APS | automated payload switch |
| APS | Advanced Payload Switch |
| APS | atmospheric purification system |
| APStar | Asia Pacific Star |
| APT | Associated Project Team |
| APT | Applied potential tomography |
| APTC | ambient pressure thermal cycling |
| APU | Auxiliary Propulsion Unit |
| APU | Auxiliary Processing Unit |
| APU | Auxiliary Power Unit |
| AQ | Resolved Observations Relevant to Air Quality |
| AQL | acceptance quality limit |
| AQL | acceptance quality level |
| AR | Anomaly Report |
| AR | Assessment Review |
| AR | atmosphere revitalization |
| AR&D | Automated Rendezvous & Docking |
| ARAPAIMA | Application for RSO Automated Proximity Analysis & Imaging |
| ARC | Astrophysical Research Consortium |
| ARC | Ames Research Center |
| ARC | Ames Research Center (NASA) |
| ARCD | Aerospace Research & Career Development |
| ARCE | Articulated Reconnaissance & Communications Expedition |
| ARCS | Argon Release for Controlled Studies |
| ARCU | American to Russian converter unit |
| ARD | Abort Region Determination |
| ARD | Atmospheric Reentry Demonstrator |
| ARED | Advanced Resistive Exercise Devise |
| ARES | Active Radiation Environment Sensor |
| ARF | alignment reference frame |
| ARGOS | Advanced Research & Global Observation Satellite |
| ARIA | Advanced Range Instrumentation Aircraft |
| ARIS | active rack isolation system |
| ARISS | Amateur Radio on International Space Station |
| ARKSAT | Akansas Satellite |
| ARM | Asteroid Redirection Mission |
| ARM | Atmospheric Radiation Measurement |
| ARMA | auto-regressive moving average |
| ARMD | Aeronautics Research Mission Directorate |
| ARME | absolute rate measurement error |
| ARO | Automated Rendezvous Officer (VVCC) |
| ARO | officer,Automated Rendezvous Officer (VVCC) |
| ARPT | analysis report |
| ARQ | automatic repeat request |
| ARS | Anomaly Reporting System |
| ARS (ARdS) | automatic redocking system |
| ART | Anomaly Resolution Team (NASA) |
| ARTEMIS | Advanced Relay TEchnology MISsion |
| ARTEMIS | Acceleration, Reconnection, Turbulence & Electrodynamics of the Moon's Interaction with the Sun |
| ARTES | Advanced Research in Telecommunications Systems |
| ARW | angular random walk |
| AS | AlliedSignal |
| AS | Apollo Saturn |
| AS | Assembly Sequence |
| ASA | Aerosurface Servo Actuator |
| ASA | Australian Space Agency |
| ASA | Astronomical Society of the Atlantic |
| ASA | Austrian Space Agency |
| ASAP | Aerospace Safety Advisory Panel |
| ASAR | Advanced Synthetic Aperture Radar |
| ASBM | Arctic Satellite Broadband Mission |
| ASC | American Satellite Company |
| ASC | Agence Spatiale Canadienne (also CSA) |
| ASCA | Advanced Spacecraft for Cosmology Astrophysics |
| ASCA | Advanced Satellite for Cosmology & Astronomy |
| ASCAN | Astronaut Candidate |
| ASCB | Avionics Software Control Board |
| ASCENDS | Active Sensing of Carbon dioxide Emissions over Nights, Days & Seasons |
| ASCII | American standard code for information interchange |
| ASCR | assured safe crew return |
| ASCR | Assured Safe Crew Return mode |
| ASE | Airborne Support Equipment |
| ASEB | Aeronautics & Space Engineering Board of the National Academies |
| ASEU | Aft Skirt Electrical Umbilical |
| ASF | Alaska Satellite Facility |
| ASF | Auto Sequence File |
| ASGSR | American Society for Gravitational and Space Research |
| ASI | Agencia Spatiale Italiano (Italian Space Agency) |
| ASI | Agenzia Spaziale Italiana |
| ASI | Agenzia Spaziale Italiana (Italian Space Agency) |
| ASI | Italian Space Agency (Agenzia Spaziale Italiana) |
| ASIC | application specific integrated circuit |
| ASIM | Atmosphere Space Interaction Monitor |
| ASL | Above Sea Level |
| ASM | attached sync marker |
| ASM | analogue signal monitor |
| ASMA | Autonomous System Management Architecture |
| ASME | American Society of Mechanical Engineers |
| ASMP | Aeronautics Strategy & Management Program |
| ASMS | Antenna Simulator and Modeling System |
| ASN | Automated Stowage Note |
| ASO | Astronomical Search for Origins |
| ASO | Administrator Staff Office |
| ASOC | Atlas Spaceflight Operations Center (ULA) |
| ASP | Airspace Systems Program |
| ASP | Astronaut Support Personnel |
| ASP | Attached Shuttle Payload |
| ASP | Acquisition Strategy Planning |
| ASP | Astronomical Society of the Pacific |
| ASPC | Attached Shuttle Payload Center |
| ASPERA-3 | Analyzer of Space Plasma & Energetic Atoms-3 |
| ASQ | American Society for Quality |
| ASRC | Arctic Slope Regional Corporation |
| ASRM | Advanced Solid Rocket Motor |
| ASRS | Automated Support Requirements System |
| ASSET-AEV | Aerothermodynamic / Elastic Structural System Test - Aerothermoelastic Vehicle |
| ASSET-ASV | Aerothermodynamic / Elastic Structural System Test - Aerothermodynamic Structural Vehicle |
| ASSP | application specific standard product |
| AST | American segment trainer |
| AST | Avionics & Software Teleconference |
| ASTER | Advanced Spaceborne Thermal Emission and Reflection Radiometer |
| ASTER | Advanced Spaceborne Thermal Emission Reflection Radiometer |
| ASTEX | Advanced Space Technology Experiment |
| ASTM | American Society for Testing Materials |
| ASTM | American Society for Testing & Materials |
| ASTP | Apollo Soyuz Test Project |
| ASTP-DM | Apollo Soyuz Test Project - Docking Module |
| ASTRO | Autonomous Space Transport Robotic Operations satellite |
| ASUSAT | Arizona State University Satellite |
| ASW | Application SW |
| AT | acceptance testing |
| AT | Acceptance Test |
| AT | Aeronautics Technology |
| AT-OCB | ATV Operations Control Board |
| ATA | advance technology attachment |
| ATAC | ATV Training Academy |
| ATB | avionics test bench |
| ATC | acquisition transfer confirmation |
| ATCM | Air Trace Contaminant Monitor |
| ATCO | Ambient Temperature Catalytic Oxidizer |
| ATCOS | Atmospheric Composition Satellite |
| ATCP | Absolute Command Processor |
| ATCS | active thermal control system |
| ATD | Astronaut Training Database |
| ATD | Air Traffic Management Technology Demonstration |
| ATDA | Augmented Target Docking Adaptor |
| ATDRS | Advanced Tracking & Data Relay Satellite |
| ATDnet | Advanced Technology Demonstration Network |
| ATE | Automatic Test Equipment |
| ATEx-LEB | Advanced Tether Experiment - Lower End Body |
| ATEx-UEB | Advanced Tether Experiment - Upper End Body |
| ATF | Australian Tracking Facility |
| ATHENA | Advanced Telescope for High-Energy Astrophysics |
| ATHENOXAT | Athene Noctua Experimental Satellite |
| ATK | Alliant Techsystems Inc. |
| ATLAS | Atmospheric Laboratory for Applications & Science |
| ATLAS | Atmosphere Thermal Lighting Articulation Specialist |
| ATLO | Assembly, Test, Launch Operations |
| ATLO | Assembly, Test, and Launch Operations |
| ATM | Asynchronous Transfer Mode |
| ATM | Atmosphere |
| ATM | Amateur Telescope Maker |
| ATM | Apollo Telescope Mount (on Skylab) |
| ATM | asynchronous transmission mode |
| ATMS | Advanced Technology Microwave Sounder (NPOESS Preparatory |
| ATO | Abort To Orbit |
| ATOX | atomic oxygen |
| ATP | Acceptance Test Plan |
| ATP | Authority to Proceed |
| ATP | Aeronautics Test Program |
| ATP | Astrophysics Theory Program |
| ATP | Autorization To Proceed |
| ATP | procedure,Acceptance Test Procedure |
| ATP | Acceptance Test Procedure |
| ATP+1m | ATP plus 1 month |
| ATR | Auto Track Receiver |
| ATR | attenuated total reflection |
| ATR | acquisition transfer request |
| ATS | Applications Technology Satellite |
| ATS | Automated Tracking Station |
| ATS | Application Technology Satellite |
| ATS | air temperature sensor |
| ATTREX | Airborne Tropical Tropopause Experiment |
| ATU | Audio Terminal Unit |
| ATV | Automated Transfer Vehicle |
| ATV | Autonomous Transfer Vehicle |
| ATV-1 | Automated Transfer Vehicle 1 |
| ATV-2 | Automated Transfer Vehicle 2 |
| ATV-3 | Automated Transfer Vehicle 3 |
| ATV-CC | Automated Transfer Vehicle Control Center |
| ATV-CC | ATV Control Center |
| ATXS | ATM Transmission System |
| AU | Astronomical Unit |
| AUAI | assembly-contingency/UHF audio interface |
| AUCP | Artemis Utilization Coordination Panel |
| AURA | Association of Universities for Research in Astronomy |
| AUSAT | Aarhus University Satellite |
| AUTcube | Aichi University of Technology CubeSat |
| AV | Audio Video |
| AV | Atrioventricular node |
| AVC | Automatic Volume Control (squelch) |
| AVC | arc voltage control |
| AVF | artificial vision function |
| AVHRR | Advanced Very High Resolution Radiometer |
| AVIM | aviation intermediate maintenance |
| AVSTC | Apple Valley Science and Technology Center |
| AVT | acceptance vibration test |
| AVU | artificial vision unit |
| AVU | CCD artificial vision unit cursor control device |
| AVV | valve,Air Vent Valve (at the NDS hatch) |
| AVV | Air Vent Valve (at the NDS hatch) |
| AW&ST | Aviation Week & Space Technology (a.k.a. AvLeak) |
| AWCS | Agency Wide Coding Structure |
| AWG | Acquisition Working Group |
| AWG | American wire gauge |
| AWGN | additive white Gaussian noise |
| AWN | angular white noise |
| AWOTS | Automated Wallops Orbital Tracking Station |
| AWS | Advanced Wideband Satellite |
| AXAF | Advanced X-ray Astrophysics Facility |
| AXAF-I | Advanced X-Ray Astronomy Facility - Imager |
| AZ | Z Axis Acceleration |
| AZ | azimuth |
| Abs | absolute |
| Acc | accessory |
| Acronym | Meaning |
| Act | active |
| Act | activate |
| Addr | address |
| Adj | adjust; regulate |
| AirMOSS | Airborne Microwave Observatory of Subcanopy & Subsurface |
| AlSat | Algerian Satellite |
| Almasat | Alma Mater Satellite |
| Alt DAP | alternate digital autopilot |
| Alt-LASER | Altimeter Laser |
| Alt-RADAR | Altimeter Radar |
| AnGap | Anion Gap |
| Ang | angle |
| Ant | antenna |
| Ap.J | Astrophysical Journal |
| Apple | Ariane Passenger Payload Experiment |
| Aries | Australian Resource Information & Environment Satellite |
| Arsene | Ariane Radio-Amateur Satellite Enseignement Espace |
| Artemis | Advanced Relay & Technology Mission |
| Assy | Assembly |
| Astro | Astronomy Satellite |
| Att | attitude |
| Aud | audio |
| Auto | automatic |
| Av | avionics |
| AvSP | Aviation Safety Program |
| Avail | available |
| B | beverage |
| B&P | Bid and Proposal |
| B-ISDN | Broadband ISDN |
| B-Sat | Broadcasting Satellite |
| B.USOC | Belgian (Bruxelles) USOC |
| B/L | baseline |
| BA | Budget Authority |
| BAA | Broad Agency Announcement |
| BAD | Broadcast Ancillary Data |
| BAF | Base Frame |
| BAFM | Business Administration and Financial Management |
| BAFO | Best and Final Offer |
| BAFR | Business Analysis and Financial Reporting |
| BAG | Bandwidth Allocation Gap |
| BAI | residual burst strength after impact |
| BARS | Baseline Accounting Reporting System |
| BAS | Basic Accounting System |
| BAT | Back-up Control Center Activation Team |
| BATC | Ball Aerospace & Technology Corporation |
| BATSAT | Broadband Advanced Technologies Satellite |
| BATSE | Burst & Transient Source Experiment (on CGRO) |
| BAe | British Aerospace (now BAE SYSTEMS) |
| BB | breadboard |
| BBA | Baseband Assembly |
| BBN | Broadband Network |
| BBS | Bulletin Board System |
| BBXRT | Broad-Band X-Ray Telescope (ASTRO package) |
| BC | broadcast code |
| BC | bus controller |
| BC | Bolt Controller |
| BC | broadcast channel |
| BC | bypass of acceptance check & control |
| BCC | Backup Control Center |
| BCC | Backup Command and Control |
| BCD | Binary Coded Decimal |
| BCDS | Broadband Communications Distribution System |
| BCDU | battery charge–discharge unit |
| BCE | Battery Conditioning Equipment |
| BCH | Bose-Chaudhuri-Hocquenghem |
| BCI | bulk cable injection |
| BCLS | Basic Cardiac Life Support |
| BCOP | Bi-lateral Crew Operations Panel |
| BCR | Baseline Change Request |
| BCRS | barycentric celestial reference system |
| BCS | Berthing Cue System |
| BCSR | Baseline Check-Status Review |
| BCSS | Biotechnology Cell Science Stowage |
| BCT | Back-up Control Center Communications Team |
| BCTA | bias calibration table assembly |
| BCWP | Budgeted Cost of Work Performed |
| BCWS | Budget Cost of Work Scheduled |
| BD | Beidou |
| BDA | Bermuda (call sign for Bermuda Ground Network Tracking Station) |
| BDB | Big Dumb Booster |
| BDC | Baseline Data Collection |
| BDE | Batch Data Entry |
| BDEALS | Bi-Lateral Data Exchange Agreements List |
| BDM | bi-level discrete monitor |
| BDS | Baseline Data System |
| BDS | Backup Drive System (JEMRMS) |
| BDT | Back-up Control Center Deployment Team |
| BE | Beacon Explorer |
| BE | Base Excess |
| BEAR | Beam Experiment Aboard Rocket |
| BEARS | Berkeley Extreme UV Airglow Rocket Spectrometer |
| BEE | basic end effector |
| BEM | Bug-Eyed Monster |
| BEO | Beyond Earth Orbit |
| BEOS | Bremen Experiment Operations System |
| BEP | Berthing Mechanism Electronics Package |
| BER | bit error rate |
| BERTS | Bit Error Rate Test Set |
| BES | Bus Enable Switch |
| BFA | Business Forecasting and Analysis |
| BFN | beam forming network |
| BFO | blood-forming organ |
| BFS | Backup Flight Software |
| BFS | Backup Flight System |
| BG | beta gimbal |
| BGA | beta gimbal assembly |
| BGRV | Boost Glide Reentry Vehicle |
| BGUSat | Ben Gurion University Satellite |
| BH | Black Hole |
| BHP | Behavioral Health & Performance |
| BIC | Barium Ion Cloud |
| BIE | Battery Interface Electronics |
| BIL | Bilirubin |
| BIM | Body Impedance Measurement |
| BIMA | Berkeley Illinois Maryland Array |
| BIMSWG | Bilateral Inventory Management System Working Group |
| BIOLAB | Biological Laboratory |
| BIOS | Biological Investigations of Space |
| BIOTESC | Switzerland (Zurich) USOC |
| BIP | Budget Input Process |
| BIP | Bioinstrumentation Passthrough |
| BIP | Battery Interface Plate |
| BIPM | Bureau International des Poids et Mesures - international bureau of weights & measures |
| BIRA | Belgian Space Agency |
| BIRD | Bispectral Infra-Red Detection |
| BIROS | Bispectral Infra-Red Optical System |
| BIS | British Interplanetary Society |
| BIS | Bureau of Industry and Security |
| BISyB | Business Information System Building Blocks |
| BIT | built-in testing |
| BIVP | Bilateral Integrated Verification Plan |
| BJOP | panel,Boeing Joint Operation Panel |
| BJOP | Boeing Joint Operation Panel |
| BJT | bipolar junction transistor |
| BLAST | Bouchet Low-Earth Alpha/Beta Space Telescope |
| BLB | Biolab |
| BLDR | Boulder |
| BLUEsat | Basic Low Earth Orbit University of New South Wales Experiment Satellite |
| BM | bus monitor |
| BM | Berthing Mechanism |
| BMAR | Back-log Maintenance & Repair |
| BMCC | Boeing Mission Control Center |
| BMCDU | Berthing Mechanism Control & Display Unit |
| BMDO | Ballistic Missile Defense Office (was SDIO) |
| BMDTTP | Ballistic Missile Defense Test Target Program |
| BME | Biomedical Engineer |
| BMG | Beam Wave Guide |
| BMO | Business Management Office (JSC) |
| BMO | Business Management Office |
| BMS | Battery Management System |
| BNL | Brookhaven National Laboratory |
| BNS | Ballistics & Navigation Software |
| BNSC | British National Space Centre |
| BNSCSat | British National Space Centre Satellite |
| BO | Brownout |
| BOC | Base Operations Contract |
| BOD | Basic Occupation Date |
| BOD | Board of Directors |
| BOE | Basis of Estimate |
| BOL | beginning of life |
| BOL | beginning–of–life |
| BOL | beginning-of-life |
| BOM | bill of materials |
| BOMP | Baseline Operations & Maintenance Plan |
| BOR | Becpilotniye Orbitalniye Raketoplan |
| BORE | Background Optical Radiation Experiment |
| BOSS | Business Operations Support Subsystem |
| BP | blood pressure |
| BP | Bundle Protocol |
| BP | Boiler Plate |
| BP/EGG | blood pressure/electrocardiogram |
| BPA | Baseband Processing Assembly |
| BPA | Blok Perspektivnoy Avioniki |
| BPC | Boost Protective Cover |
| BPDU | Bitstream Packet Data Unit |
| BPGT | Blossom Point Ground Terminal |
| BPR | Biological and Physical Research |
| BPR | Baseline Performance Review |
| BPRS | Blossom Point Remote Station |
| BPSK | binary phase shift keying (see PSK) |
| BPSK | Binary Phase Shift Key (keyed or keying) |
| BPSK | binary phase shift keying |
| BPSMU | Battery Power Speaker Microphone Unit (worn by crew) |
| BR | Bioastronautics Research |
| BR | Bench Review |
| BRC | Block Recording Computer |
| BRF | boresight reference frame |
| BRI | Basic Rate Interface |
| BRIC | Budget and Resource Management Information Center |
| BRIC | Biological Research In Canisters |
| BRICSat | Ballistically Reinforced Communication Satellite |
| BRIsat | Bank Rakyat Indonesia Satellite |
| BRML | Block Recording Mission Log |
| BRO | Breizh Reconnaissance Orbiter |
| BROS | Binational Radiofrequency Observing Satellites |
| BRS | Block Recording System |
| BRT | tether,body restraint t. |
| BRT | body restraint tether |
| BRT | Bit Results Table |
| BRT | Business and Restricted Technology |
| BRTS | Bilateral Ranging Transponder System |
| BRU | Block Recording Unit |
| BRU | Battery Relay Unit |
| BRYNTRN | Baryon transport model |
| BS | Broadcasting Satellite |
| BSB | British Sky Broadcasting |
| BSC | bare solar cell |
| BSD | bi-directional serial digital |
| BSE | Broadcasting Satellite Experiment |
| BSHEALS | Bi-Lateral SW/HW Exchange & Agreements List |
| BSI | Bundesamt für Sicherheit in der Informationstechnik |
| BSM | Bootstrap Monitor |
| BSM | Berth Survival Mode |
| BSP | baseband signal processor |
| BSR | back surface reflector |
| BSR | Biological Sciences Research |
| BSR | Bit Slippage Rate |
| BSRN | Baseline Surface Radiation Network |
| BSTS | Biotechnology Specimen Temperature Controller |
| BSW | Bit Status Word |
| BTA | Boilerplate Test Article |
| BTE | Boltzmann transport equation |
| BTF | biotechnology facility |
| BTG | bit transition generator |
| BTW | By The Way |
| BTs | product of bandwidth & symbol duration |
| BUN | Blood Urea Nitrogen |
| BUSAT | Beihang University Satellite |
| BVR | Block V Receiver |
| BW | bandwidth |
| BWB | Blended Wing Body |
| BWG | Beam Wave Guide |
| B_TYPE | broadcast type |
| BiCMOS | bipolar complementary metal oxide semiconductor |
| Biosat | Biological Satellite |
| Boe-CFT | Boeing Crew Flight Test (the first CST-100 crewed flight) |
| Booster | Booster engineer |
| Bq | becquerel |
| Brk | brake |
| Byp | bypass |
| C | capacitance |
| C | concentration expressed in mg/m3 |
| C&C | command & control |
| C&C MDM | Command & Control Multiplexer/Demultiplexer |
| C&C; CC | command and control |
| C&CCP | cleanliness & contamination control plan |
| C&CDH | Command & Data Handling |
| C&DH | Command & Data Handling |
| C&N | Communications and Navigation |
| C&T | Communications and Tracking |
| C&T | Communications & Tracking |
| C&T | communication & tracking |
| C&TCS | Communications and Tracking Checkout System |
| C&TS | communication & tracking system |
| C&W | Caution & Warning |
| C&W | Caution and Warning |
| C&W,C/W | caution and warning (system) |
| C&WA | Caution & Warning Analysis |
| C&WP | C&W Panel (JEMRMS) |
| C-OOS | Columbus On-orbit Operations Summary |
| C-T-S | Call-To-Stations |
| C/A | Coarse/Acquisition (code) |
| C/N | carrier to noise ratio |
| C/N | Carrier-to-Noise Ratio |
| C/NOFS | Communications / Navigation Outage Forecasting System |
| C/O | Check Out |
| C1 | concentration expressed in ppm |
| C2NOC | Consolidated Corporated Network Operations Center |
| C2V2 | Common Communications for Visiting Vehicle |
| C3-PO | Columbus Cloud Compute - Performance Ops |
| C3I | Command, Control, Communications and Information |
| C3S | Command, Control, & Communication Segment |
| C4 | Command, Control, Communication Computers |
| CA | construction analysis |
| CAA | Crew Access Arm |
| CAAR | compatibility assessment & applicability report |
| CAAS | Contract Administration and Audit Services |
| CACTUS | Coordinated Applied Capitol Technology University Satellite |
| CAD | Center Assistant to the Director |
| CAD | computer aided design |
| CAD | Computer-Aided Design |
| CAD | Computer-Aided Dispatch |
| CADMOS | Centre d'Aide au Développement de la Microgravité et aux Opérations Spatiales |
| CADRE | CubeSat investigating Atmospheric Density Response to Extreme driving |
| CADU | Channel Access Data Unit (= VCDU) |
| CAE | computer aided engineering |
| CAGE | commercial & government entity |
| CAI | Cargo Analysis Integration |
| CAIB | Columbia Accident Investigation Boardy |
| CALIOP | Cloud-Aerosol Lidar with Orthogonal Polarization |
| CALIPSO | Cloud-Aerosol Lidar & Infrared Pathfinder Satellite Observations |
| CALIPSO | Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation |
| CAM | maneuver,Collision Avoidance Maneuver (ATV) |
| CAM | Collision Avoidance Maneuver |
| CAM | Collision Avoidance Maneuver (ATV) |
| CAM | Centrifuge Accommodation Module |
| CAM | Computer-Aided Manufacturing |
| CAM | Control Account Managers |
| CAM | Centrifuge Accomodation Module |
| CAM/CAF | computerized anatomical man/male / computerized anatomical female |
| CAMEO | Chemically Active Materials Ejected in Orbit |
| CAN | Call sign for Canberra, Australia Ground Network Tracking Station |
| CAN | controller area network |
| CANDOS | Communications and Navigation Demonstration on Shuttle |
| CANYVAL-X | CubeSat Astronomy by NASA & Yonsei using Vision ALignment eXperiment |
| CAP | Competitive Access Provider |
| CAP | Control Account Plan |
| CAP | Corrective Action Plan |
| CAPCOM | Capsule Communicator |
| CAPE | Cajun Advanced Picosat Experiment |
| CAPER | Cleft Accelerated Plasma Experiment Rocket |
| CAPEX | Capital Expenditures Airbus (CapEx) |
| CAPL | Centre Aisle Payload |
| CAPS | Comet/Asteroid Protection System |
| CAPSTONE | Cislunar Autonomous Positioning System Technology Operations & Navigation Experiment |
| CAPSat | Cooling, Annealing, Pointing Satellite |
| CAR | Cloud Absorption Radiometer |
| CAR | Corrective Action Request |
| CARA | California Association for Research in Astronomy |
| CARA | Center for Astrophysical Research in Antarctica |
| CARDS | Computer-Aided Recording and Display System |
| CART | Cloud and Radiation Testbed |
| CART | Columbus Access Request Tool |
| CART | Columbus Anomaly Response Team |
| CARVE | Carbon in Arctic Reservoirs Vulnerability Experiment |
| CAS | Cooperative Application Satellite |
| CAS | Cross-Agency Support |
| CAS | Cost Accounting Standards |
| CAS | Coverage Analysis System |
| CAS | Calibrated Ancillary System |
| CASA | Crew Alternate Sleep Accommodation |
| CASIS | Center for the Advancement of Science in Space |
| CASP | Cross Agency Support Programs |
| CASPA | Cold Atom Space Payload |
| CAST | Chinese Academy of Space Technology |
| CAST | Commercial Aviation Safety Team |
| CAT | Configuration Assessment Tool |
| CAT | CubeSat Assessment & Test |
| CAT | Corrective Action Team |
| CAT | Capsule Ariane Technologique |
| CATIA | Drawing Program Name |
| CATM&E | Catalog Maintenance & Enhancement |
| CATO | Communication & Tracking Officer |
| CATS | Cheap Access To Space |
| CATS | Cloud-Aerosol Transport System |
| CATSAT | Cooperative Astrophysics And Technology Satellite |
| CAVES | Cooperative Adventure for Valuing & Exercising human behavior & performance Skills |
| CB | Connection Box |
| CB | Control Board |
| CB INT | Control Bus Internal |
| CBA | Charcoal Bed Assembly |
| CBA | Collective Bargaining Agreements |
| CBA | common berthing adapter |
| CBC | Complete blood count |
| CBCP | current baseline cost plan |
| CBCS | Computer Based Control System |
| CBERS | China Brazil Earth Resources Satellite |
| CBGA | ceramic ball grid array |
| CBIT | Commanded BIT |
| CBIT | Comprehensive Built in Test |
| CBJ | Congressional Budget Justification |
| CBM | common berthing mechanism |
| CBOSS | Cellular Biotechnology Operations Support System |
| CBPD | Continuous Blood Pressure Device |
| CBR | Constant Bit Rate |
| CBS | cost breakdown structure |
| CBT | Computer Based Tools |
| CBT | Computer Based Training |
| CBTA | Computer Based Training Area |
| CC | Common Carrier |
| CC | (ATV) Control Center |
| CC | Cluster Controller |
| CC | (Integrated) Cargo Carrier |
| CC | Centennial Challenges Program |
| CC | Configuration Control |
| CC | Convolutional Coding |
| CC | Control Centre |
| CC&M | common cause & common failure mode analysis |
| CCA | Circuit Card Assembly |
| CCA | Carbon Dioxide Control Assembly |
| CCA | communication carrier assembly,comm(unication) cap |
| CCACS | Center for Commercial Applications of Combustion in Space |
| CCAFS | Cape Canaveral Air Force Station |
| CCAS | Contractor Cost Accrual System |
| CCAS | Cape Canaveral Air Station (now once again CCAFS) |
| CCB | Configuration Control Board |
| CCB | Change Control Board / Contract Change Board |
| CCC | Concurrent Computer Corporation |
| CCC | Control Center Complex |
| CCC | Consolidated Control Center |
| CCCD | Crew Compartment Configuration Drawing |
| CCCM | Center Customer Commitment Manager |
| CCD | Charge-Coupled Device |
| CCDB | configuration control database |
| CCDPI | command, control, & data prime item |
| CCDS | Customer Cost Distribution System |
| CCDS | Consultative Committee On Space Data Systems |
| CCDS | Centers for the Commercial Development of Space |
| CCDTS | Common Carrier Domestic Satellite Transponder Service |
| CCDev | Commercial Crew Development |
| CCE | Charge Composition Explorer |
| CCF | Component Configuration Flag |
| CCF | Consolidated Communications Facility |
| CCGA | ceramic column grid array |
| CCGSE | Carrier/Customer Ground Support Equipment |
| CCHP | constant conductance heat pipe |
| CCITT | Consultative Committee for International Telephone and Telegraph |
| CCITT | Consultative Committee for International Telegraph & Telephone |
| CCL | Closed-circuit loop |
| CCM | CoFR Coordination Manager |
| CCM | Customer Commitment Manager |
| CCMC | Community Coordinated Modeling Center |
| CCN | Contract Change Notice |
| CCO | Contract Change Order |
| CCO | Customer Commitment Office |
| CCOM | Control Center Operations Manager |
| CCP | Camera Control Panel (JEMRMS) |
| CCP | Commercial Crew Program |
| CCPK | crew contaminant protection kit |
| CCPK | Crew Contamination Protection Kit |
| CCR | Corner Cube Reflector |
| CCS | Columbus Coolant Service |
| CCS | Command & Control System |
| CCS | Complex Control Sets |
| CCS | Cuts, Consolidations, & Savings |
| CCS | Communications and Control Segment/System |
| CCS | Command & Control Software |
| CCS | Configuration and Control Segment |
| CCS | Contamination Control System |
| CCSA | Common Control Switching Arrangement |
| CCSDS | Consultative Committee for Space Data Systems |
| CCSFS | Cape Canaveral Space Force Station (formerly: CCSAS – Cape Canaveral Air Force Station) |
| CCSFS | Cape Canaveral Space Force station |
| CCSP | Climate Change Science Program |
| CCSR | Communications and Control Segment Replacement |
| CCT | Central Communications Terminal |
| CCTV | closed circuit television |
| CCTV | Closed-Circuit Television |
| CCU | Configuration Control Unit |
| CCU | Center Control Unit |
| CCV | Commercial Crew Vehicle |
| CCW | Configuration Command Word |
| CCW | counterclockwise |
| CCWS | command and control workstation |
| CD | Central Data |
| CD | Compact Disc |
| CD&SC | Communications Distribution and Switching Centers |
| CD-MCS | Columbus Decentralized Mission Control System |
| CD-ROM | Compact Disc Read-Only Memory |
| CDA | Command and Data Acquisition |
| CDA | Cabin Depressurization Assemblies |
| CDAF | Central Data Acquisition Facility |
| CDC | Control Data Corporation |
| CDC | Centers for Disease Control |
| CDCN | Control and Display Computer Network |
| CDDT | Countdown Demonstration Test |
| CDE | Common Desktop Environment |
| CDE | Consolidated Development Environment |
| CDF | Communications Data Formatter |
| CDF | Concurrent Design Facility |
| CDF | Command Frame |
| CDG | Command & Data Group |
| CDHF | Central Data Handling Facility |
| CDI | Configuration Data Item |
| CDL | capillary driven loop |
| CDL | Controlled Documents List |
| CDM | Commercial Development Manager |
| CDM | Continuous Diagnostics and Mitigation |
| CDM | Canadian Dexterous Manipulator |
| CDMA | Code Division Multiple Access |
| CDMCS | Columbus Distributed Monitoring & Control Subsystem |
| CDMI | Columbus Data Management Infrastructure |
| CDMU | central data management unit |
| CDMU | command & data management unit |
| CDR | crew commander |
| CDR | Conceptual Design Review |
| CDR | Critical Design Review |
| CDR | Space Station Commander (crew position) |
| CDR | Commander |
| CDR | Central Data Recording |
| CDRA | Carbon Dioxide Removal Assembly |
| CDRS | Carbon Dioxide Removal System |
| CDRS | Carbon Dioxide Reduction |
| CDS | Command and Data Software |
| CDS | Capability Demonstration Satellite |
| CDS | Control Data Systems |
| CDSCC | Canberra Deep Space Communications Complex |
| CDT | Customer Documentation Tree |
| CDU | Configuration Data Unit |
| CE | conducted emission |
| CE | Current Expendable |
| CE | Conformité Européenne |
| CE | Chief Engineer |
| CE&R | Concept Evaluation and Refinement |
| CEA | Center Export Administrator |
| CEASE | compact environmental anomaly sensor |
| CEB | combined electronics box |
| CECC | CENELEC electronic components committee |
| CECOFF | Columbus Engineering Coordination Officer |
| CECR | Construction & Environmental Compliance & Restoration |
| CEF | Change Evaluation Form |
| CEFN | Columbus Electronic Flight Notes |
| CEIT | Crew Equipment Interface Test |
| CELESTA | CERN Latchup Experiment Student satellite |
| CELT | Critical Event Log Table |
| CELTEE | CubeSat Enhanced Locator Transponder Evaluation Experiment |
| CEN | European Committee for Standardization |
| CENBUD | Central Budget System |
| CENELEC | Comité Européen de Normalisation Electrotechnique |
| CEO | Crew Earth Observation |
| CEOS | Committee on Earth Observation Satellites |
| CEOS | Committee on Earth Observation Satellites (LaRC) |
| CEP | Cylindrical Electrostatic Probe |
| CEPA | Columbus External Payload Adapter |
| CEPEX | Central Equatorial Pacific Experiment |
| CEPXS/ONELD | One-dimensional Coupled Electron-Photon Multigroup Discrete Coordinates Code System |
| CERES | Capacité de Renseignement Electromagnétique d’origine Spatiale |
| CERES | Clouds & the Earth's Radiant Energy System |
| CERES | Clouds and the Earth’s Radiant Energy System |
| CERES | Central European Regional Satellite |
| CERN | European Organisation for Nuclear Research |
| CERT | ESA Computer & Communications Emergency Response Team |
| CES | Contingency Exercise Surface |
| CESAR | Chile Satellite for Amateur Radio |
| CESG | CCSDS Engineering Steering Group |
| CESR | Centre d'Etude Spatiale des Rayonnements Mars exploration |
| CET | Central European Time |
| CETA | crew & equipment translation assembly |
| CETA | aid,crew and equipment translation a. |
| CETA | crew and equipment translation aid; crew and equipment translation assembly |
| CEU | control electronics unit |
| CEV | Crew Exploration Vehicle |
| CEV | Crew Exploration Vehicle (old Constellation term) |
| CEVIS | Cycle Ergometer with Vibration Isolation System |
| CEVP | Countermeasure Evaluation and Validation Project |
| CEX | charge exchange |
| CF | Central Facility |
| CF | communication frame |
| CFA | Cabin Fan Assembly |
| CFA | adapter,Centaur Forward Adapter (CST-100 LV) |
| CFA | Center For Astrophysics |
| CFC | Chlorofluorocarbons |
| CFC | ChloroFluoroCarbon |
| CFCT | Col-CC Flight Control Team |
| CFD | Computational Fluid Dynamics |
| CFD | Central Flight Dynamics (Subsystem) |
| CFDP | CCSDS File Delivery Protocol |
| CFESat | Cibola Flight Experiment Satellite |
| CFF | Columbus Free Flyer |
| CFHT | Canada-France-Hawaii Telescope |
| CFI | Customer Furnished Item |
| CFISRD | customer furnished items & services requirements document |
| CFIT | Controlled Flight Into Terrain |
| CFLOS | Cloud-free-line-of-sight |
| CFN | Columbus Flight Note |
| CFO | Chief Financial Officer |
| CFR | Code of Federal Regulations |
| CFRP | carbon fibre reinforced polymer |
| CFRP | carbon-fibre-reinforced plastic |
| CFRP | carbon fibre reinforced plastic |
| CFT | test,Crew Flight Test |
| CFT | Crew Flight Test |
| CFU | colony forming unit |
| CG | Center of Gravity |
| CGA | column grid array |
| CGBA | Commercial Generic Bioprocessing Apparatus |
| CGI | Common Gateway Interface |
| CGRO | Compton Gamma Ray Observatory |
| CGRO | (Arthur Holley) Compton Gamma Ray Observatory (was GRO) |
| CGS | Columbus Ground Software (or System) |
| CGS | Columbus Ground System |
| CGSI | Columbus Ground System Infrastructure |
| CH | collection hardware |
| CHAMP | Comet Halley Active Monitoring Program |
| CHAMP | Challenging Mini-Satellite Payload |
| CHARA | Center for High Angular Resolution Astronomy |
| CHARGE | Cooperative High Altitude Rocket Gun Experiments |
| CHARGECON-GEO | Charge Control in Geostationary Orbit |
| CHARM | CubeSat Hydrometric Atmospheric Radiometer Mission |
| CHEFsat | Cost-effective High E-Frequency Satellite |
| CHEM | Chemistry |
| CHEOPS | Characterising Exoplanets Satellite |
| CHI | Computer Human Interface |
| CHIA | cargo-handling interface adapter |
| CHIPS | Cosmic Hot Interstellar Plasma Spectrometer |
| CHIPS | Cosmic Hot Interstellar Spectrometer |
| CHIPSat | Cosmic Hot Interstellar Plasma Spectrometer |
| CHIRP | Commercially Hosted Infrared Payload |
| CHIRP | CubeSat VHF pulse transmitter to study the Ionospheric dispersion Radio Pulses |
| CHIRPS | Computer Hardware Inventory and Repair Processing System |
| CHIT | (See MAR new title of the document) |
| CHOL | Cholesterol |
| CHOMPTT | CubeSat Handling Of Multisystem Precision Time Transfer |
| CHP | Crew Health & Performance |
| CHRS | centralized heat removal system |
| CHS | Crew Health & Safety |
| CHS | Crew Health and Safety |
| CHX | Condensing Heat Exchanger |
| CHeCS | Crew Health Care System |
| CI | Configuration Item |
| CIB | Continuous Improvement Board |
| CIC | Capital Investment Council |
| CIC | CSOC Integration Center |
| CIC | Copper - Invar - Copper |
| CIC | connector integrated cell |
| CICA | Competition in Contracting Act |
| CICERO | Community Initiative for Cellular Earth Remote Observation |
| CID | circuit interrupt device |
| CIDL | Configuration Item Data List |
| CIDP | Central Instrument Data Processor |
| CIEF | Carrier Independent Exchange Facility |
| CIF | Center Innovation Fund Program |
| CIF | Central Instrumentation Facility |
| CIL | critical items list |
| CIL | critical-item list |
| CIL | critical item list |
| CIM | Customer Interface Management |
| CIMO | Customer Interface Management Office |
| CIMON | Crew Interactive MObile companioN |
| CIMS | Calibration Information Management System |
| CINDI | Coupled Ion Neutral Dynamics Investigation |
| CINEMA | CubeSat for Ions, Neutrals, Electrons, & Magnetic fields |
| CIO | Center Information Officer |
| CIO | Chief Information Officer |
| CIO | Cargo Integration Officer |
| CIO | Customer Integration Office |
| CIOP | Columbus Increment Operations Planner |
| CIP | Configuration Item Production Data List |
| CIP | International Communications and Information Policy |
| CIP | Change Information Page |
| CIPAIR | Curriculum Improvements Partnership Award for the Integration of |
| CIR | combustion integrated rack |
| CIRA | COSPAR International Reference Atmosphere |
| CIRAS | CubeSat Infrared Atmospheric Sounder |
| CIRBE | CubeSat Inner Radiation Belt Experiment |
| CIRRIS | Cryogenic InfraRed Radiance Instrument for Shuttle |
| CIRiS | Compact Infrared Radiometer in Space |
| CIS | Commercialization, Innovation, and Synergies |
| CIS | Center Information System |
| CIS | Centre for Internet Security |
| CIS | CGS Interface Server |
| CIT | Circumstellar Imaging Telescope |
| CITE | Cargo Integrated Test Equipment |
| CITEL | Inter-American Telecommunications Commission |
| CIU | Central Interface Unit |
| CIU | Communication Interface Unit |
| CI± | chemical ionization |
| CJ | Congressional Justification (Budget) |
| CJ | Congressional Justification |
| CK | Creatinine Kinase |
| CL | Contractor Leased |
| CL | Confidence Level |
| CLA | capture latch assembly |
| CLA | Camera/Light Assembly |
| CLARREO | Climate Absolute Radiance & Refractivity Observatory |
| CLASS | Communications Link Analysis and Simulation System |
| CLCC | ceramic leaded chip carrier |
| CLCL | Checkout and Launch Control System |
| CLCN | Commercial Lunar Communication and Navigation |
| CLCS | Checkout and Launch Control System |
| CLCS | Consolidated Launch Control System |
| CLCW | communications link control word |
| CLCW | command link control word |
| CLF | Central Logistics Facility |
| CLF | Consolidated Logistics Facility |
| CLICK | CubeSat Laser Infrared Crosslink |
| CLIP | Columbus Lead Increment Planner |
| CLIPS | C Language Integrated Production System |
| CLMP | Coding Modulation Link Protocol |
| CLPA | Camera/Light & Pan/tilt unit Assembly |
| CLPS | Commercial Lunar Payload Support |
| CLS | Columbus Language System |
| CLSOV | Condensate Line Shut Off Valve |
| CLSRB | Current Launch Schedule Review Board |
| CLSW | Columbus LAN Switch |
| CLTU | Command Link Transmission Unit |
| CLTU | communications link transmission unit |
| CLTV | Cis-Lunar Transfer Vehicle |
| CLV | Commercial Launch Vehicle |
| CLV | Crew Launch Vehicle |
| CM | Command Module (Apollo spacecraft) |
| CM | Command Module |
| CM | Columbus module |
| CM | Center of Mass |
| CM | Configuration Management |
| CM | Co-elliptic Maneuver |
| CM | module,Crew Module (CST-100) |
| CM | Countermeasures |
| CM | corrective maintenance |
| CM | Crew Module |
| CM&O | Center Management & Operations |
| CM&S | Communications Maintenance and Storage |
| CMA | China Meteorological Administration |
| CMA | Crew Module Adapter |
| CMA | Command Modulator Assembly |
| CMASS | Crew Module Ammonia Servicing Subsystem |
| CMAU | Columbus network Monitoring & Administration Unit |
| CMBR | Cosmic Microwave Background Radiation |
| CMC | Complex Monitor and Control |
| CMC | Center for Macromolecular Crystallography |
| CMC | Ceramic Matrix Composites |
| CMC | Center Management Council |
| CMCB | Configuration Management Control Board |
| CMCC | Central Mission Control Centre (ESA) |
| CMD | Command |
| CMDB | Configuration Management Database |
| CME | Coronal Mass Ejection |
| CMG | control moment gyroscope |
| CMG only | CMG only mode |
| CMG/TA,CMG TA | CMG/Thruster Assist mode |
| CMIF | complex mode indicator function |
| CMILP | consolidated maintenance inventory logistics planning |
| CMIP | Common Management Information Protocol |
| CML | current mode logic |
| CMLP | Coding, Modulation, and Link Protocol |
| CMM | carrier modulation mode |
| CMMI | capability maturity model integration |
| CMO | Configuration/Contract Management Office |
| CMO | Configuration Management Office |
| CMO | crew medical officer |
| CMO | Center Management Operations |
| CMOS | complementary metal oxide semiconductor |
| CMP | Configuration Management Plan |
| CMRD | Configuration Management Receipt Desk |
| CMRS | crew medical restraint system |
| CMS | Command Management System |
| CMS | Command and Monitoring System |
| CMS | countermeasures system: |
| CMS | Countermeasure System |
| CMS | Carbon Monitoring System |
| CMS | countermeasures system |
| CMS | CDAF Matrix Switch |
| CMS | Command Matrix Switch |
| CMS | carbon molecular sieve |
| CMSM | Center Mission Services Manager |
| CMU | Command & Measurement Unit |
| CMV | Co-Manifested Vehicle |
| CMW | Change Management Workflow |
| CMWG | Configuration Management Working Group |
| CN | criticality number |
| CN | change notice |
| CNES | Centre Nationale D’Etudes Spatiale (French Space Agency) |
| CNES | National Center for Space Study (France) |
| CNES | Centre National d’Etudes Spatiales (National Space Study Center – France) |
| CNMOS | Consolidated Network and Mission Operations Support |
| CNO | Carbon-Nitrogen-Oxygen |
| CNQ | Cost of No Quality |
| CNS | central nervous system |
| CNSA | China National Space Administration |
| CNSI | Classified National Security Information |
| CNSR | Comet Nucleus Sample Return |
| CNTL | Control |
| CNUSail | Chungnam National University Sail |
| CO | Carbon Monoxide |
| CO | Contracting Officer |
| CO2 | Carbon Dioxide |
| COA | Certificate of Acceptance |
| COADS | Comprehensive Ocean and Atmosphere Data Set |
| COAP | COre APplication Software |
| COARE | Coupled Ocean-Atmosphere Response Experiment |
| COB-ID | communication object identifier |
| COBE | Cosmic Background Explorer |
| COBRAS | Cosmic Background Radiation Anisotropy Satellite |
| COC | cross orthogonality check |
| COD | Center Operations Directorate |
| COF | Columbus Orbital Facility |
| COF | Patric Air Force Base (TACAN) |
| COF-APM | Columbus Orbital Facility - Attached Pressurized Module |
| COF2 | Carbonyl Fluoride |
| COG | centre of gravity |
| COGS | Cost Estimating Module for Mission Operations and Ground Data Systems |
| COL | Columbus |
| COL FD | Columbus Flight Director |
| COL-ACE | Columbus Activation & Checkout Engineer |
| COL-BCC | Columbus Back-up Control Centre |
| COL-CC | Columbus Control Center |
| COL-ESC | Columbus Engineering Support Centre |
| COL-KA | Columbus Ka-Band Antenna |
| COL-OV | Columbus Operational Validation |
| COL-TRE | Columbus Trainer Europe |
| COLA | Collision On Launch Assessment |
| COLEST | Columbus Operations |
| COLKA | Columbus Ka-Band Antenna |
| COM | Center of Mass |
| COM/MON | Command/Monitoring |
| COMET | Commercial Experiment Transporter |
| COMET | Columbus Operation & Mission Execution Timeline Engineer |
| COMETS | Communication Engineering Test Satellite |
| COMM | Communications |
| COMMA | comma K28.7 |
| COMMS | Communications |
| COMPTEL | COMPton TELescope (on CGRO) |
| COMS | Communication, Ocean & Meteorological Satellite |
| COMSEC | Communications Security |
| CONAE | Argentina’s National Committee of Space Activities |
| CONFIG | Configuration |
| CONS | Connection Oriented Network Service |
| CONTOUR | Comet Nucleus Tour |
| COOP | Continuity of Operations Plan |
| COP | Columbus Operations Planner |
| COPC | composite over-wrapped pressurized component |
| COPE | Cooperative Observations of Polar Electrodynamics |
| COPPER | Close Orbiting Propellant Plume & Elemental Recognition |
| COPS | composite over-wrapped pressurized structures |
| COPV | composite overwrapped pressure vessel |
| COR | Center Of Rotation |
| COR | Communications Outage Recorder |
| COR | Contracting Officer’s Representative (formerly COTR) |
| COR | Computer Operations Room |
| CORB | Columbus Operations Readiness Board |
| CORBA | Common Object Request Broker Architecture |
| CORBA | Common Object Request Brocker Architecture |
| CORF | Committee on Radio Frequency |
| CORIS | Code O Requirements Information System |
| COROT | Convection Rotation à Transits planétaires / Convection Rotation & planetary Transits |
| COS | Celestial Observation Satellite |
| COSMIC | Constellation Observing System for Meteorology, Ionosphere & Climate |
| COSMIC | Constellation Observing System for Meteorology Ionosphere and Climate |
| COSMO | Columbus On-orbit Stowage & Maintenance Officer |
| COSMO | Constellation of Small Satellites for Mediterranean basin observation |
| COSPAR | Committee on Space Research |
| COSPAS | Space System for the Search of Vessels in Distress (Cosmicheskaya Sistyema Poiska Avariynich Sudov – Russian) |
| COSPE | composite over-wrapped special pressurized equipment |
| COSS | Crew Onboard Support System |
| COSTAR | Corrective Optics Space Telescope Axial Replacement |
| COSTR | Collaborative Solar-Terrestrial Research |
| COT | Crew Operations Team |
| COTR | Contracting Officer’s Technical Representative |
| COTS | Commercial Off The Shelf |
| COTS | Commercial Orbital Transportation System |
| COTS | Commercial Orbital Transportation Services |
| COTS | Commercial Off-The-Shelf |
| COU | Concept of Operations & Utilization |
| COU | Concept of Operations and Utilization |
| COUP | Consolidated Operations & Utilization Plan |
| CP | Cal Poly Picosatellite |
| CP | Camera Port |
| CP | Check Point |
| CPA | Command Processor Assembly |
| CPACS | Cargo Planning Analysis & Configuration System |
| CPAH | Columbus Payload Accommodation Handbook |
| CPC | Commercial Payload Centres |
| CPDMI | Columbus Payload Data Management Infrastructure |
| CPDU | command pulse distribution unit |
| CPE | Change Package Engineer |
| CPE | Customer-provided equipment |
| CPE | chlorinated poly ethylene |
| CPEOC | Community Partners Emergency Operations Center |
| CPF | Calibration Parameter File |
| CPI | Columbus Payload Integration |
| CPI | Cost Performance Index |
| CPIA | chemical propulsion information agency |
| CPIF | Cost Plus Incentive Fee |
| CPL | capillary pumped loop |
| CPLSW | Columbus Payload LAN SWitch |
| CPM | critical path method |
| CPN | Change Page Notice |
| CPOD | Cubesat Proximity Operations Demonstration |
| CPP | Capacity Projection Plan |
| CPP | Central Part Procurement |
| CPPA | centralized parts procurement agent |
| CPPI | crystal preparation prime item |
| CPR | Cardiopulmonary resuscitation |
| CPRP | Critical Path Road Map Project |
| CPS | Cryogenic Propulsion Stage |
| CPS | Consolidated Planning System |
| CPSD | Crew Personal Support Drive |
| CPST | Cryogenic Propellant Storage & Transfer |
| CPU | central processing unit; central processor unit |
| CPU | central processing unit |
| CPU | Computer Processing Units |
| CPV | composite pressure vessel |
| CPWG | Crew Provisioning Working Group |
| CQ | Crew Quarter |
| CQRM | Crew Qualification & Responsibility Matrix |
| CQRM | Crew Qualification Requirement Matrix |
| CR | Compliance Review |
| CR | Change Request |
| CRA | cleaning requirement analysis |
| CRADA | Cooperative Research and Development Agreements |
| CRAF | Comet Rendezvous / Asteroid Flyby |
| CRAM | Communications Routing and Metering |
| CRC | Critical Replaning Criteria |
| CRC | cyclic redundancy check |
| CRC | cyclic redundancy code |
| CRC | Communications Research Centre (Canada) |
| CRCM | Combined Radiometric Correction Model |
| CREA | Creatinine |
| CREAM | Cosmic Ray Energetics & Mass |
| CREME | cosmic ray effects on microelectronics |
| CRES | corrosion-resistant steel |
| CRF | Capability Reliance Framework |
| CRF | Communications Resource Facility |
| CRI | Center for Rotorcraft Innovation |
| CRISTA-SPAS | Cryogenic Infrared Spectrometers & Telescopes for the Atmosphere Shuttle Palette Satellite |
| CRK | CO2 Removal Kit |
| CRL | Communications Research Laboratory (Japan) |
| CRL | Countermeasure Readiness Level |
| CRL | Cambridge Research Laboratory Satellite |
| CRM | Continuous Risk Management |
| CRO | Chemical Release Observation |
| CRONUS | Communications, Radio Frequency, and Onboard Networks Utilization Specialist |
| CRPCM | Canadian remote power control module |
| CRR | commissioning results review |
| CRR | commissioning result review |
| CRR | customer requirements review |
| CRRES | Combined Release / Radiation Effects Satellite |
| CRS | Commercial Resupply Services |
| CRT | Cathode-Ray Tube |
| CRT | Centerline Reflector Target |
| CRV | Crew Return Vehicle |
| CRYOSTAT | Cryogenic Propellant Storage & Transfer |
| CS | Communication Satellite |
| CS | Constellation Systems |
| CS | Critical System |
| CS | Customer Service |
| CS | central supplies |
| CSA | Canadian Space Agency (also ASC) |
| CSA | Canadian Space Agency |
| CSA | Cooperative Solar Array |
| CSA-CP | compound specific analyzer–combustion products |
| CSA-CP | Compound Specific Analyzer-Combustion Products |
| CSA-H | compound specific analyzer–hydrazine |
| CSAD | communication system analysis document |
| CSADD | communication system architectural design document |
| CSAR | Configuration Status Accounting Report |
| CSBD | communication system baseline definition |
| CSC | Commercial Space Centers |
| CSC | Computer Sciences Corporation |
| CSCI | Computer Software/system Configuration Item |
| CSCI | Computer Software Configuration Item |
| CSCS | Central Security Control System |
| CSD | Commercial Spaceflight Development |
| CSD | coordinate systems document |
| CSDA | continuous slowing down approximation range |
| CSDDD | communication system detailed design document |
| CSDL | Combined Systems Development Lab |
| CSEA | Commercial Spectrum Enhancement Act |
| CSES | China Seismo-Electromagnetic Satellite |
| CSG | Centre Spatial Guyanais - Kourou Launch Site |
| CSG | Crew Support Group |
| CSI | Cost Savings Initiative |
| CSI | customer source inspection |
| CSIC | CMV Software Integegration Cycle |
| CSIR | Council for Scientific and Industrial Research (South Africa) |
| CSIRO | Commonwealth Scientific and Industrial Research Organisation (Australia) |
| CSIRT | Computer Security Incident Response Team |
| CSLA | Contract Service Level Agreement |
| CSLE | Civil Service Labor and Expenses |
| CSLE | Civil Service Labor & Expenses |
| CSLM | Coarsening in Solid-Liquid Mixtures |
| CSM | Customer Satisfaction Metrics |
| CSM | Command & Service Module (Apollo spacecraft) |
| CSMAC | Communication System Monitor and Control |
| CSO | Chief S&MA Officer |
| CSO | Communication Service Office |
| CSOAR | Colorado Student Atmospheric Rocket |
| CSOC | Consolidated Space Operations Center |
| CSOC | Consolidated Space Operations Contract |
| CSOM | communication system operations manual |
| CSP | Cost Savings Profile |
| CSP | CheCS Supply Pack |
| CSPD | communication system profile document |
| CSPE | Colorimetric Solid Phase Extraction |
| CSR | Communication Service Request |
| CSRD | Current Stage Requirement Document |
| CSRM | Coordination Status Review Meeting |
| CSS | Cross Support Services |
| CSS | Control and Status System |
| CSS | Core Simulation Software |
| CSS | Communications Services Section |
| CSSWE | Colorado Student Space Weather Experiment |
| CST-100 | Crew Space Transportation 100 |
| CSTC | Consolidated Space Test Center |
| CSTC | Consolidated Space Test Center (USAF) |
| CSTD | Crosscutting Space Technology Development |
| CSTL | Communications, Standards, and Testing Lab |
| CSTS | Cross Support Transfer Service |
| CSU | Channel Service Unit |
| CSU | command-signal unit |
| CSUNSat | California State University Northirdge Satellite |
| CSV | comma-separated values |
| CSVP | communication system verification plan |
| CSVS | Canadian space vision system |
| CSW | Configuration Status Words |
| CT | Crawler Transporter |
| CT | Communication and Tracking (system) |
| CT | Compatibility Testing |
| CTA | Centro Tecnico Aeroespacial (Brazil) |
| CTA | Canadian Target Assembly |
| CTB | Cargo Transfer Bag |
| CTB | Central Thermal Bus |
| CTBE | Cargo Transfer Bag Equivalent |
| CTC | Chief Technologist Council |
| CTCA | Cabin Temperature Control Assembly |
| CTCBV | Cabin Temperature Controller Bypass Valve |
| CTCU | Central Telemetry and Command Unit |
| CTCU | Cabin Temperature Control Unit |
| CTE | coefficient of thermal expansion |
| CTE | charge transfer efficiency |
| CTFS | Common Time and Frequency System |
| CTG | Communication & Tracking Group |
| CTI | charge transfer inefficiency |
| CTIM-FDA | Compact Total Irradiance Monitor Flight Demonstration |
| CTIO | Cerro Tololo Interamerican Observatory |
| CTL | Compatibility Test Laboratory |
| CTLP | compatibility testing for liquid propulsion |
| CTM | Control, Test, and Monitor |
| CTM | Center Technology Manager |
| CTM | Command & Telemetry Machine |
| CTM | crew transportation module |
| CTN | Commercial Technology Network |
| CTN | Communications and Tracking Network |
| CTOCC | Consolidated TDRSS Operations Control Center |
| CTOD | crack tip opening displacement |
| CTP | Core Technology Programme |
| CTQ | Critical to Quality |
| CTR | current transfer ratio |
| CTS | Crew Transportation System |
| CTS | Compatibility Test Set |
| CTS | Center Telecommunications System |
| CTS | Communication Technology Satellite |
| CTT | crew transfer tunnel |
| CTT | Compatibility Test Trailer |
| CTT | consent to transport |
| CTV | Crew Transfer Vehicle |
| CTV | Compatibility Test Van |
| CTV | Crew Transport Vehicle |
| CU | control unit |
| CU | Configuration Unit |
| CU-E3 | Colorado University Earth Escape Explorer |
| CUC | CCSDS unsegmented code |
| CUC | CCSDS unsegmented time code |
| CUCD | Contingency urine containment device |
| CUI | Controlled Unclassified Information |
| CUNYSAT | City University of New York Satellite |
| CUP | cupola,Cupola |
| CUP | Composite Utilization Plan |
| CUP | Cupola |
| CUSat | Cornell University Satellite |
| CUTE | Cubical TITech Engineering Satellite |
| CV | Cost Variance |
| CV | Cataclysmic Variable |
| CVCM | collected volatile condensable material |
| CVD | chemical vapour deposition |
| CVG | coverglass |
| CVIU | common video interface unit |
| CVT | Current Value Table |
| CVU | Control & Video Unit (part of PK-4) |
| CW | clockwise |
| CW | command word |
| CW | continuous wave |
| CW | Carrier Wave |
| CWAS | Cryogenic Whole Air Sampler |
| CWBS | Contract Work Breakdown Structure |
| CWC | collapsible waste container |
| CWI | Common Work Instruction |
| CWP | control work package |
| CWRS | Condensate Water Recovery System |
| CX | Citizen Explorer |
| CX | Chuang Xin |
| CXBR | Cosmic X-ray Background Radiation |
| CXO | Chandra X-ray Observatory (formerly: AXAF,Advanced X-ray Astrophysics Facility) |
| CXO | Chandra X-Ray Observatory |
| CY | Calendar Year |
| CZT | cadmium zinc telluride (semiconductor material) |
| CaLV | Cargo Launch Vehicle |
| CaLeMPSat | Cathode-Less Micro Propulsion Satellite |
| CaNOP | Canopy Near-IR Observing Project |
| Cab | cabin |
| Cal | calibration |
| Calc | calculate |
| Calsphere | Calibration Sphere |
| Camr; Cam | camera |
| CanX | Canadian Advanced Nanospace Experiments |
| CapSat | Capacitor Satellite |
| CatSat | Cooperative Astrophysics & Technology Satellite |
| CeREs | Compact Radiation Belt Explorer |
| Cerise | Caractérisation de l'Environement Radioélectrique par un Instrument Spatial Embarque |
| Ch | channel |
| ChemCam | Chemistry Camera |
| Chg | change |
| Chit | Change Item |
| Chrg | charge |
| Ci | curie |
| Cksum | checksum |
| Clim | minimum volumetric concentration of oxygen contained in an oxygen-nitrogen mixture, in the presence of which a material can still combust after ignition from the bottom. |
| CoC | certificate of conformance |
| CoC | certificate of confirmity |
| CoF | Construction of Facilities |
| CoFR | Certification of Flight Readiness |
| CoFR | Certificate of Flight Readiness |
| CoM | centre of mass |
| CoMAC | coordinate modal assurance criterion |
| CoNNeCT | Communications, Navigation, and Networking re-Configurable Testbed (now the SCaN Testbed) |
| CoNNeCT | Communications, Navigation, & Networking reConfigurable Test Bed |
| CoSI | Commercial Satellite Communications Innovation |
| CoSTEM | OSTP interagency Committee on STEM Education |
| Code M | Office of Space Flight |
| Code R | Office of Aerospace Technology |
| Code S | Office of Space Science |
| Code U | Office of Biological and Physical Research |
| Code Y | Office of Earth Science |
| Col COMMS | Columbus Communications |
| Col DMS | Columbus Data Management System |
| Col FCT | Columbus Flight Control Team |
| Col FLIGHT | Columbus Flight Director |
| Col OC | Columbus Operations Coordinator |
| Col SYS | Columbus Systems |
| Col-SVF | Columbus Software Verification Facility |
| Col-TRU | Columbus Trainer USA |
| ColCC | Columbus Control Centre |
| ColEDS | Columbus Electronic Document System |
| Comm | Communication |
| Compass | Complex Orbital Magneto-Plasma Autonomous Small Satellite |
| ConOps | Concept of Operations |
| Conv | converter |
| Coronas | Comprehensive Orbital Near-Earth Observations of the Active Sun |
| Corsa | Cosmic Radiation Satellite |
| Cpath | Circle Path |
| Cplt | complete |
| CrIS | Cross-track Infrared Sounder (NPOESS Preparatory Project instrument) |
| CuPID | Cusp Plasma Imaging Detector |
| CuSP | CubeSat mission to study Solar Particles |
| CuSPP | CubeSat mission to study Solar Particles over the Earth’s Poles |
| CubeRRT | CubeSat Radiometer Radio Frequency Interface Technology |
| Cx | Constellation |
| CySat | Cyclone Satellite |
| D&C | display & control |
| D&C | Displays and Controls |
| D&C PNL | display & control panel |
| D/A | Digital-to-Analog |
| D/A | digital to analogue |
| D/HRE | The Director of Human Spaceflight & Robotic Exploration Programmes |
| D/K | data/control |
| D/L | Downlink |
| D3 | Drag De-Orbit Device CubeSat |
| D; Deck | deck |
| DA | Decision Authority |
| DA | Deutsche Aerospace |
| DAA | Deputy Associate Administrator |
| DAAC | Distributed Active Archive Center |
| DAAC | Distributed Active Archive Centers |
| DAC | design analysis cycle |
| DACT | Disposable Absorption & Containment Trunk |
| DAD | Double Air Density |
| DADS | Data Archive and Distribution System |
| DAEP | DSN Aperture Enhancement Project |
| DAF | Data Analysis Facility |
| DAG | DaSS Access Gateway |
| DAILI | Daily Atmospheric Ionospheric Limb Imager |
| DAIU | docked audio interface unit |
| DAM | maneuver,Debris Avoidance Maneuver (ISS) |
| DAM | Debris Avoidance Maneuver |
| DAM | Directory Access Management |
| DAM | Debris Avoidance Maneuver (ISS) |
| DAMEC | Denmark (Odense) USOC |
| DAN | Dynamic Albedo of Neutrons |
| DANDE | Drag & Atmospheric Neutral Density Explorer |
| DAP | Double Adapter Plate |
| DAP | digital autopilot |
| DARN | Dual Auroral Radar Network |
| DARPA | Defense Advanced Research Projects Agency |
| DARPASAT | Defense Advanced Research Projects Agency Satellite |
| DART | Demonstration of Autonomous Rendezvous Technologies |
| DART | Double Asteroid Redirection Test |
| DARTfire | Diffusive & Radiative Transport controlled fire |
| DAS | Demand Access Service |
| DAS | data acquisition system |
| DASD | Direct Access Storage Device |
| DASH | Demonstrator of Atmospheric reentry System with Hyperbolic velocity |
| DASH | Density & Scale Height |
| DASS | Data Acquisition Sub-System |
| DASS | Distress Alerting Satellite System |
| DAT | Digital Audio Tape |
| DATS | Despun Antenna Test Satellite |
| DB | design baseline |
| DBB | Data Base Browser |
| DBC | direct bonded copper |
| DBMS | Data Base Management System |
| DBP | Diastolic blood pressure |
| DBS | Database Server |
| DBS | Data Base Services |
| DBS | Direct Broadcasting Satellite |
| DC | Docking Compartment |
| DC | Delta Clipper |
| DC | Differential Corrections |
| DC | Design Condition |
| DCAA | Defense Contract Audit Agency |
| DCAA | Defense Contract Auditing Agency |
| DCB | development configuration baseline |
| DCC | dry cargo carrier |
| DCC | Document Control Custodian |
| DCCS | Document Change Control System |
| DCD | DSCC Command |
| DCE | Distributed Computing Environment |
| DCF | Data Capture Facility |
| DCI | decompression illness |
| DCL | declared component list |
| DCL | declared components list |
| DCL | declared part list |
| DCLA | Design Coupled Load Analysis DCN Document Change Notice |
| DCMA | Defense Contract Management Agency |
| DCN | Document Change Notice |
| DCN (NDC) | Document Change Notification; Notification Of Document Change |
| DCNSS | Data Center Network and Security Service |
| DCP | development cost plan |
| DCP | Display and Control Panel |
| DCPCG | dynamically controlled protein crystal growth |
| DCR | Design Certification Review |
| DCR | Document Change Request |
| DCS | decompression sickness (bends) |
| DCS | Decompression Sickness |
| DCS | Digital Cross-connect system |
| DCS | Deputy Crew Surgeon |
| DCSU | dc switching unit |
| DCSU | direct-current switching unit |
| DCX | Delta Clipper eXperimental |
| DD | displacement damage |
| DD | design documentation |
| DDC | Direct Digital Control |
| DDC | distribution data counter |
| DDCT | Display Data Control Table |
| DDCU | DC-to-DC Converter Unit |
| DDCU | direct-current-to-direct-current converter unit |
| DDCU-E | DC-to-DC/Converter Unit-External |
| DDE | FOD’s Distributed Development Environment |
| DDED | Detailed Data Editor |
| DDEF | displacement damage equivalent fluence |
| DDF | Data Distribution Facility |
| DDF | design definition file |
| DDF | design & definition file |
| DDMS | DOD Manned Space Flight Support Office |
| DDOR | Delta Differential One Way Ranging tones |
| DDP | Design & Development Plan |
| DDR | detailed design review |
| DDREF | dose & dose rate effectiveness factor |
| DDS | Data Distribution Services |
| DDS | Data Distribution Service |
| DDS | Data & Documentation Service |
| DDT&E | Design, Development, Test, and Evaluation |
| DDT&E | Design, Development, Test, & Evaluation |
| DDTE | Design, Development, Test, & Evaluation |
| DDVP | Design, Development and Verification Plan |
| DE | Dynamics Explorer |
| DEBUT | Deployable Boom & Umbrella Test |
| DEC | declination |
| DEC | dynamic evaluation circuit |
| DEC | stage,Dual Engine Centaur (stage) (CST-100 LV) |
| DECAT | Dynamic Engineering Communications Analysis Testbed |
| DECnet | Digital Equipment Corporation Network |
| DEMETER | Detection of Electro-Magnetic Emissions Transmitted from Earthquake Regions |
| DEMOS | Distributed Earth Model Orbiter System |
| DEN | DTN Experimental Network |
| DEOS | Deutsche Orbitale Servicing Mission |
| DES | data encryption standard |
| DESCANO | Deep Space Communications and Navigation Systems |
| DESDynI | Deformation, Ecosystem Structure, & Dynamics of Ice |
| DESDynl | Deformation, Ecosystem Structure, and Dynamics of Ice |
| DESPATCH | Deep Space Amateur Troubadour’s Challenge |
| DEV; Dev | deviation |
| DEXA (DXA) | Dual energy X-ray absorptiometry |
| DEXA,DXA | Dual Energy X-ray Absorptiometry |
| DF | definition file |
| DFAT | Direct Field Acoustics Test |
| DFCB | Data Format Control Book |
| DFCD | Data Format Control Document |
| DFE | Direct from Earth |
| DFH | Dong Fang Hung |
| DFI | Developmental Flight Information |
| DFL | Decom Format Load |
| DFMR | design for minimum risk |
| DFP | Data Flow Plan |
| DFRC | Dryden Flight Research Center |
| DFRF | Dryden Flight Research Facility (was ADFRF, now DFRC) |
| DFS | Deutscher Fernmelde Satellit |
| DFS | Development Flight Satellite |
| DFS | Distributed File System |
| DFT | design for test |
| DFT | data flow test |
| DG | Data Group |
| DG-C | Director General Cabinet |
| DG-Z | DDS Delayed Ground Zone |
| DGD | direct gradient discharge |
| DGPS | Differential-Global-Positioning-System |
| DGT | DSCC Galileo Telemetry Subsystem |
| DHM | digital human model |
| DHMR | dry heat microbial reduction |
| DHS | Department of Homeland Security |
| DHS | data handling system |
| DI | burn,Departure Initiation burn (CST) |
| DI | Departure Initiation burn (CST) |
| DI | Data Item |
| DIA | Details Impact Assessment |
| DICE | Dynamic Ionosphere Cubesat Experiment |
| DID | Data Item Description |
| DIDB | Disposable In-suit Drink Bag |
| DIF | Data Interface Facility |
| DIFA | Data Interface Assembly DIL Deliverable Items List |
| DIL | deliverable items list |
| DIL | dual-in-line |
| DIMA | Distributed IMA |
| DIMS | Digital Imagery Management System |
| DIRO | Directorate Information & Record Officer |
| DIS | Distributed Interactive Simulation (IEEE 1278.1-2012 v7) |
| DIS | Data Interface System |
| DISCNCT,DSC; Discnct | disconnect |
| DISCOS | ESA’s database & information system characterizing objects in space |
| DISCOS | ESA's database & information system characterizing objects in space |
| DISCOSAT | Discovery Museum Satellite |
| DISCOVER | Deriving Information on Surface Conditions from Column & Vertically |
| DIT | Development Integration Testing |
| DIU | Data Interface Unit (JEMRMS) |
| DIVA | Double Interferometer for Visual Astrometry |
| DIW | deionised water |
| DIXI | Deep Impact Extended Investigation |
| DJ | justification file |
| DJF | design & justification file |
| DJF | design justification file |
| DKth | threshold stress-intensity range |
| DL | design load |
| DL | Download |
| DLAT | destructive lot acceptance test |
| DLISA | Double Lid Interlock Switch Assembly |
| DLL | design limit load |
| DLL | data link layer |
| DLL | design limits loads |
| DLR | Deutschen Zentrum fur Luft- und Raumfahrt (German Aerospace Center) |
| DLR | Deutsches Zentrum für Luft- und Raumfahrt e.V. |
| DLR-Tubsat | Deutsche Forschungsanstalt für Luft- und Raumfahrt - Technische Universität Berlin Satellit |
| DLT | Digital Tape |
| DM | Document Management DMA Declared Material List |
| DM | Data Management |
| DMA | direct memory access |
| DMAIC | Define Measure Analyze Improve Control |
| DMC | DSCC Monitor and Control |
| DMC | Data Management Coordinator |
| DMC | Data Management Computer |
| DMD | DSCC Media Data |
| DME | Development, Modernization, & Enhancement |
| DME | Distance Measuring Equipment |
| DME | Direct Measurement Explorer |
| DML | declared material list |
| DML | declared materials list |
| DMM | digital multimeter |
| DMO | Data Management Office |
| DMP | Declared Mechanical Parts List DMS Data Management System |
| DMPL | declared mechanical part list |
| DMPL | declared mechanical parts list |
| DMPL | declared materials & processes list |
| DMPR | Deployable Mechanical Pumped Radiator |
| DMR | Daily Medical Report |
| DMR | Detailed Mission Requirements |
| DMS | Data Management Subsystem |
| DMS | Document Management System |
| DMS | Data Management System |
| DMS-R | Data Management Subsystem for the Russian Service Module |
| DMSP | Defense Meteorological Satellite Program |
| DMT | Decreed Moscow Time D-OPS Directorate Operations DN Discrepancy Notice |
| DMZ | Demilitarized Zone |
| DN | Discrepancy Note |
| DNA | deoxyribonucleic acid |
| DNA | Desoxyribonucleic acid |
| DNS | Domain Name Servers |
| DNS | Director of Network Services |
| DNase | Deoxyribonuclease |
| DO | Delivery Order |
| DO | DOVE Oscar |
| DO45 | Flight Planning & Pointing Group |
| DOC | Data Operations Center |
| DOC | Department of Commerce |
| DOC | Data Operations Control |
| DOCS | Data Operations Control System |
| DOD | depth of discharge |
| DOD | Department of Defense |
| DOD | Department Of Defense (sometimes DoD) |
| DODGE | Department of Defense Gravity Gradient Experiment |
| DODISS | Department of Defense Index of Specifications and Standards |
| DOE | Department of Energy |
| DOI | Department of Interior |
| DOL | Day of Launch |
| DOLILU | Day-of-Launch Initialization-Load Updates |
| DOME | Device for Orientation & Motion Environment |
| DOME | Device for Orientation and Motion Environment |
| DOMSAT | Domestic Satellite |
| DOMSAT | Domestic Communications Satellite |
| DOP | dioctylphthalate |
| DOP | dioctylphthalate, synonym bis (2ethylhexyl) phthalate |
| DOP | dioctylphthalate, synonym bis (2-ethylhexyl) phthalate |
| DOR | Daily Operations Report |
| DORIS | Doppler Orbitography by Radiopositioning Integrated by Satellite (Ocean |
| DOS | Disk Operating System |
| DOS | Dolgovremennaya Orbitalnaya Stanziya |
| DOS | Daily Operations Summary |
| DOSRAD | software to predict space radiation dose at system & equipment level |
| DOSS | Differential Optical Shadow Sensor |
| DOT | Department of Transportation |
| DOT | Deep Space Optical Communications Terminal |
| DOUG | Dynamic Onboard Ubiquitous Graphics |
| DOVE | Digital Orbiting Voice Encoder |
| DOY | Day of Year |
| DP | Destination Point |
| DP | Differential Pressure |
| DP | Digital Processing |
| DP | Data Package |
| DPA | Debris Pane Assembly |
| DPA | destructive physical analysis |
| DPAF | Dual Payload Attach Fitting |
| DPAK | diode package |
| DPAS | Defense Priorities and Allocation System |
| DPC | Daily Planning Conference |
| DPL | declared process list |
| DPL | declared parts list |
| DPL | declared processes list |
| DPM | Deputy Program Manager |
| DPMC | Directorate Program Management Council |
| DPO | attitude control thruster |
| DPO | Deep Space Network Program Office |
| DPO | Daily Payloads Operations |
| DPR | Dual-frequency Precipitation Radar (Global Precipitation Measurement |
| DPS | Deep-Space Positioning System |
| DPS | Data Processing System |
| DPS | Data Processing System engineer |
| DPU | data processing unit |
| DQ | Da Qi |
| DQI | Data Quality Indicator |
| DQM | Data Quality Monitoring |
| DR | Discrepancy Report |
| DR | Deputy of Resources |
| DR | Decommissioning Review |
| DR | Disposition Record |
| DRA | Draft |
| DRAM | dynamic random access memory |
| DRB | delivery review board |
| DRC | Data Reduction Center |
| DRC | design rule check |
| DRC | design rules check |
| DRD | Data Requirements Document |
| DRD | Document Requirements Definition |
| DRF | Data Requirements Form |
| DRI | Distant Retrograde Insertion |
| DRIFT | diffuse reflection infrared Fourier transform |
| DRIMS | Delta Redundant Inertial Measurement System |
| DRL | Data Requirements List |
| DRL | document requirements list |
| DRL | document requirement list |
| DRM | design reference mission |
| DROPPS | Distributions & Role Particle in the Polar Summer Mesosphere using Co-ordinated Rocket, Radar & Lidar techniques |
| DRS | Disturbance Reduction System |
| DRS | Docking & Refueling System |
| DRS | Data Relay Satellite |
| DRS | Direct Receiving Station |
| DRS | Discrepancy Reporting System |
| DRTS | Data Relay and Tracking Satellite (JAXA) |
| DRTS | Data Relay & Tracking Satellite |
| DRVID | differenced range versus integrated Doppler |
| DS | Deep Space |
| DS | Dneprovskiy Sputnik |
| DS-DE | data-strobe, differentially ended |
| DS-T | Deep Space Terminal |
| DSA | Demodulator Synchronizer Assembly |
| DSAC | Deep Space Atomic Clock |
| DSC | differential scanning calorimeter |
| DSC | differential scanning calorimetry |
| DSCC | Deep Space Communications Complex |
| DSCOVR | Deep Space Climate Observatory |
| DSCS | Defense Satellite Communications System |
| DSCS | Defense Space Communication System |
| DSE | Deep Space Element |
| DSE | Distributed Sensing Experiment |
| DSG | Deep Space Gateway |
| DSH | Deep Space Habitat |
| DSI | Deutsches SOFIA Institut |
| DSLWP | Discovering the Sky at Longest Wavelengths Pathfinder |
| DSM | Docking & Stowage Module |
| DSM | Data Select Mode (GPS) |
| DSMC | Data Services Management Center |
| DSMS | Deep Space Mission Systems |
| DSN | Deep Space Network |
| DSN-GCS | Deep Space Network – Ground Communications System |
| DSNU | dark signal non-uniformity |
| DSO | Deep Sky (or Space) Object |
| DSOC | Deep Space Optical Communications |
| DSOT | Deep Space Operations Team |
| DSP | Defense Support Program (USAF/NRO) |
| DSP | DSS Spectral Processor |
| DSP | Digital Signal Processor (Processing) |
| DSPK | Dual Speaker Unit |
| DSPSE | Deep Space Program Science Experiment |
| DSPSE-ISA | Deep Space Program Science Experiment - Interstage Adaptor |
| DSR | Design Status Review |
| DSRI | Danish National Space Center |
| DSS | Destination Surface System |
| DSS | Data Storage System |
| DSS | Deep Space Station |
| DST | Daily Science Tag |
| DSTD | Data Systems Technology Division |
| DSTL | Data Systems Technology Laboratory |
| DSU | Digital Service Unit |
| DSWG | Data Standards Working Group |
| DSXR | Deep Space eXploration Robotics |
| DTA | differential thermal analysis |
| DTD | distribution transfer descriptor |
| DTD | Data Transfer Device |
| DTE | Direct-to-Earth |
| DTE | Data Transmission Equipment |
| DTF | Development and Test Facility |
| DTGS | deuterated triglycine sulphate IR detector |
| DTM | density & temperature model |
| DTMF | Dual Tone Multi-frequency |
| DTN | Disruption Tolerant Networking |
| DTN | Delay/Disruption Tolerant Network |
| DTR | Data Transfer Review |
| DTS | Distributed Teleconferencing System |
| DTS | Digital Test Set |
| DTUSat | Danmarks Tekniske Universitet Satellite |
| DU | Display Unit |
| DU | Dobson Unit |
| DUA | Docking Unit,Active |
| DUL | design ultimate load |
| DUNDEE | Down Under Early Warning Experiment |
| DUNS | data universal numbering system |
| DUP | Docking Unit,Passive |
| DUSTIE | Dust Sounder & Temperature Imager Experiment |
| DUT | device under test |
| DUTHSat | Democritus University of Thrace Satellite |
| DUVE | Diffuse Ultra Violett Experiment |
| DV | Dissimilar Voice |
| DVC | Digital Video Controller |
| DVD | Digital Versatile Disc |
| DVE | engine,Delta-Velocity Engine (Cygnus) |
| DVG | direct voltage gradient |
| DVICE | Digital Voice Intercommuncations Equipment |
| DVIS | Digital Voice Intercommunications System |
| DVP | design validation plan |
| DVP | DSCC VLBI Processor |
| DVT | design verification test |
| DW | data word |
| DWG | Disciplines Working Group |
| DWV | dielectric withstanding voltage |
| DXF | drawing exchange format |
| DXI | Data Exchange Interface |
| DYF | Display Frame |
| DYL | design yield load |
| D\A | Digital to Analog |
| DaRT | Data Request Tool |
| DaSS | Data Servicing System |
| DaSS | Data Services System |
| DaSS | Data Services Subsystem |
| Dawn | NASA Science Mission Directorate Discovery Program Mission |
| Dbase | database |
| Decr | decrease |
| Decreed Moscow Time | nan |
| Def | definition |
| Deg | degree |
| Delta-DOR | Delta-Differential One-way Range |
| Delta_V | delta velocity |
| Depress | depressurize |
| Detailed | Design Phase |
| Dial-MIKA | Diamant Allemagne - Mini Kapsel |
| Dial-WIKA | Diamant Allemagne - Wissenschafts Kapsel |
| Dif | difference |
| Dir | direct |
| Disch | discharge |
| Disp | display |
| Dist | distribution |
| Dn | down |
| DoF | degree of freedom |
| Dply | deploy |
| DumSat | Dummy Satellite |
| Dur | duration |
| Dwg | drawing |
| E | Execution |
| E | eccentricity |
| E-2-E | End-to-End |
| E-CHIT | European Mission Request (MCC-H) |
| E-DCP | Extended Design Consolidation Phase |
| E-M L2 | Earth–Moon LaGrange Orbit 2 |
| E-S | Earth-to-Space |
| E-S L1 | Earth – Sun LaGrange 1 |
| E-S L2 | Earth – Sun LaGrange 2 |
| E-TBEx | Enhanced Tandem Beacon Experiment |
| E-USOC | Spain (Madrid) USOC |
| E-t-E | End-to-End |
| E/PO | Education & Public Outreach |
| E/S | Earth station |
| E3 | Electromagnetic Environmental Effects |
| E3P | European Exploration Envelope Programme |
| E3P2 | European Space Exploration Envelope Programme |
| EA | electronic assembly |
| EAB | Equipped Avionics Bay |
| EAC | Estimate at Completion |
| EAC | European Astronaut Centre |
| EACP | EVA audio control panel |
| EACP | EMU audio control panel |
| EADS | European Aeronautic Defense & Space |
| EAFB | Edwards Air Force Base |
| EAGLE | ESPA Augmented Geostationary Laboratory Experiment |
| EAI | Excalibur Almaz, Inc. |
| EAP | Educator Astronaut Program |
| EAR | Export Administration Act |
| EAR | Export Administration Regulation |
| EARD | Exploration Architecture Requirements Document |
| EARM | ECSS applicable requirements matrix |
| EAS | early ammonia servicer |
| EAST | East African Satellite Telecomunication |
| EATCS | external active thermal control system |
| EAW | Engineering Analysis Workstation |
| EB | Bureau of Economic and Business Affairs |
| EB | electron beam |
| EBB | elegant breadboard |
| EBF | end broadcast frame |
| EBGS | Earth Based Ground Systems |
| EBM | Emergency Breathing Mask |
| EBNF | extended Backus‐Naur form |
| EBNF | extended Backus-Naur form |
| EBRE | Earth-Based Relay Element |
| EBW | electron beam welding |
| EBnet | EOS Backbone Network |
| EC | Emergency Communications |
| EC | economic conditions |
| EC | European Commission |
| EC | Equipment Cost |
| ECANS | Exploration Communications and Navigation Systems |
| ECB | Engineering Change Board |
| ECB | Engineering Change (or Control) Board |
| ECC | Emergency Control Center |
| ECCS | expendable charcoal catalyst system |
| ECD | Estimated Completion Date |
| ECDH | Early Command and Data Handling |
| ECDL | Engineering Change Data List |
| ECEF | Earth centred Earth frame |
| ECF | Engineering Computer Facility |
| ECG | Environmental Control Group |
| ECG-DS | ECG in DS lead |
| ECHA | European Chemicals Agency |
| ECHHP | Environmental Crew Health Hazards Protection |
| ECL | emitter-coupled logic |
| ECLS | environmental control & life support |
| ECLSS | Environmental Control & Life Support System |
| ECM | electrochemical migration |
| ECM | in-flight experiment for contamination monitoring |
| ECM | Engineering Change Management |
| ECM | ECSS compliance matrix |
| ECN | Engineering Change Notice |
| ECN No. | Equipment Control Number |
| ECO | Engineering Change Order |
| ECOH | EPT Console Operations Handbook |
| ECOM | mechanism,EVA change-out m. |
| ECOMM | early communication |
| ECOMM | Early Communications |
| ECOS | ESA Costing Software |
| ECOSTRESS | Ecosystem Spaceborne Thermal Radiometer Experiment on Space Station |
| ECP | Engineering Change Proposal |
| ECR | Engineering Change Request |
| ECR | Environmental Compliance & Restoration |
| ECS | early communication subsystem |
| ECS | Environmental Control System |
| ECS | European Communication Satellite |
| ECS | Experimental Communication Satellite |
| ECS | EOSDIS Core System |
| ECSL | environmental control & life support |
| ECSS | European Cooperation for Space Standardisation |
| ECT | Energetic Particle, Composition & Thermal Plasma |
| ECU | electronics control unit |
| ECW | Emergency Caution & Warning |
| ED | NASA Education |
| ED | Engineering Directorate (JSC) |
| ED | Department of Education |
| EDA | En Route Descent Advisor |
| EDAC | Error Detection and Correction |
| EDC | Engineering Design Change |
| EDC | EROS Data Center |
| EDD | Event Driven Delivery |
| EDF | end data frame |
| EDIF | electronic design interchange format |
| EDL | Entry Descent and Landing |
| EDL | Entry, Descent, & Landing |
| EDLT | Entry, Descent & Landing Technologies |
| EDM | electro discharge machining |
| EDO | Extended Duration Orbiter |
| EDOMP | extended duration Orbiter medical project |
| EDOMP | Extended Duration Orbiter Medical program |
| EDOS | EOS Data and Operations System |
| EDP | Electronic Data Processing |
| EDR | European Drawer Rack |
| EDR | Environmental Data Record |
| EDR2 | European Drawer Rack Mark 2 |
| EDS | system,Emergency Detection System (CST-100 LV) |
| EDS | Emergency Detection System |
| EDS | Earth Departure Stage |
| EDS | electronic data sheet |
| EDT | EVA Development Test |
| EDT | Eastern Daylight Time |
| EDU | Engineering Development Unit |
| EDU | EFU Driver Unit (JEF) |
| EDU | EEU Driver Unit |
| EDUSAT | Education Satellite |
| EDV | electronic depressurizing valve |
| EE | electronics enclosure |
| EEA | Earth exclusion angle |
| EEATCS | early external active thermal control system |
| EED | electro-explosive device |
| EEE | Evolution of EOSDIS Elements |
| EEEU | End Effector Electronics Unit |
| EEFOV | Extended Elliptical Field of View |
| EEG | Electroencephalography |
| EEGS | Emergency Egress Guidance |
| EEL | emergency egress light |
| EELV | Evolved Expendable Launch Vehicle |
| EEO | Equal Employment Opportunities |
| EEOM | Early End of Mission |
| EEP | error end of packet |
| EEPROM | electrically erasable programmable read-only memory |
| EES | European Emergency Simulation |
| EES | Emergency Egress Slide |
| EESS | Emergency Egress Slide System |
| EESS | Earth Exploration Satellite Service |
| EET | End-to-End Test |
| EETCS | early external thermal control system |
| EEU | equipment exchange unit |
| EF | exposed facility |
| EF | Extended Facility |
| EF | Exposed Facility (see also JEF) |
| EF A | Exposed Facility,Aft |
| EF F | Exposed Facility,Forward |
| EFA | engineering feasibility assessment |
| EFB | Electronic Field Book |
| EFBM | Exposed Facility Berthing Mechanism |
| EFGF | electrical flight grapple fixture |
| EFIS | ESA Financial & Invoicing System |
| EFM | Electrical and Functional Model |
| EFM | Engineering Functional Model |
| EFN | Electrical Flight Note |
| EFOV | Extended Field of View |
| EFPL | exposed facility payload |
| EFR | established failure rate |
| EFRCB | European Flight Rule Control Board |
| EFT | Exploration Flight Test |
| EFTCA | External Flow & Temperature Control Assembly |
| EFU | exposed facility unit |
| EFW | Electric Field & Waves Instrument |
| EGDH | Early Generalized Data Handling |
| EGG | re-Entry satellite with Gossamer aeroshell & Gps/Iridium |
| EGRET | Energetic Gamma Ray Experiment Telescope (on CGRO) |
| EGRS | Electronic & Geodetic Ranging Satellite |
| EGS | Experimental Geodetic Satellite |
| EGS | Exploration Ground Systems |
| EGSE | Electrical Ground Support Equipment |
| EGSE ZN | Electrical Ground Support Equipment (ZwoNull means Second Generation) |
| EHD | External Hard Drive |
| EHF | extremely high frequency (30 GHz-300 GHz) |
| EHF | extremely high frequency, frequency from 30 GHz to 300 GHz |
| EHIP | EVA Helmet Interchangeable Portable light |
| EHO | ESA Houston Office |
| EHP | EVA Human Surface Mobility Program |
| EHRS | Electronic Health Records System |
| EHS | environmental health system |
| EHS | Enhanced HOSC System |
| EI | effective independence |
| EI | electron ionization |
| EIA | experiment integration agreement |
| EICL | European IP Communication Laptop |
| EIDP | End Item Data Package (design & manufacturing dossier) |
| EIFI | European Item for Investigation |
| EIM | Element Integration Manager |
| EIRP | equivalent isotropically radiated power |
| EIRP | Effective Isotropic Radiated Power |
| EIS | External Interface Server |
| EIS | Enterprise Information System |
| EISA | ESA ISS SCB Access |
| EISP | External I/F Server Protocol |
| EIT-CalRoc | Extreme UV Imaging Telescope Calibration Rocket |
| EJASA | Electronic Journal of the Astronomical Society of the Atlantic |
| EJMA | expansion joints manufacturer association |
| EJOP | European Joint Operations Panel |
| EKA | Eksperimentalniy Kosmichesky Apparat |
| EKS | Edinaya Kosmicheskaya Sistema |
| EL | elevation |
| EL3 | European Large Logistics Lander |
| ELC | ExPRESS Logistics Carrier |
| ELDRS | enhanced low dose rate sensitivity |
| ELDRS | enhanced low dose-rate sensitivity |
| ELEOsat | Extreme Low Earth Orbit Satellite |
| ELF | Extremely Low Frequency |
| ELFIN | Electron Losses & Fields Investigation |
| ELFIN-STAR | Electron Losses & Fields Investigation's Spatio-Temporal Ambiguity Resolver |
| ELM | experiment logistics module |
| ELM–ES | experiment logistics module–exposed section |
| ELM–PS | experiment logistics module–pressurized section |
| ELO | Emergency Landing Opportunity |
| ELO | opportunity,Emergency Landing Opportunity |
| ELPO&TD | Execute level Planning Operations & Tool Development |
| ELPS | Emergency Light Power Supply |
| ELR | end-of-life review |
| ELS | enviornmental life support |
| ELT | European Laser Timing (ACES) |
| ELT | Emergency Locator Transmitter |
| ELV | Expendable Launch Vehicle |
| ELVIS | ELV Integrated Support |
| EM | Engineering Model |
| EM | Energy (or Power) Module |
| EM | Electromagnetic |
| EM | experiment module |
| EM2 | Electronics Box Engineering Model 2 |
| EMA | External Monitoring Aids |
| EMAC | Exploration Mission Analysis Cycle |
| EMB | (ESA ISS) Exploitation Management Board |
| EMC | electromagnetic compatibility |
| EMC | Element Multiplexer/Correlators |
| EMCAB | electromagnetic compatibility advisory board |
| EMCAB | EMC Advisory Board |
| EMCC | Emergency Mission Control Center |
| EMCCP | electromagnetic compatibility control plan |
| EMCS | Enhanced Mission Communication System |
| EMCS | Energy Management Control System |
| EMCS | European Modular Cultivation System |
| EMCY | Emergency Object |
| EMD | Electromechanical Dissociation |
| EME | Electromagnetic Environment |
| EMEVP | electromagnetic effects verification plan |
| EMEVR | electromagnetic effects verification report |
| EMF | Electro-Magnetic Flux |
| EMFISIS | Electric & Magnetic Field Instrument Suite & Integrated Science |
| EMI | electromagnetic interference |
| EMI/EMC | Electromagnetic Interference & Electromagnetic Compatibility |
| EMIS | Exploitation Management Information System |
| EMISM | electromagnetic interference safety margin |
| EMK | Emergency Medical Kit |
| EML | Electromagnetic Levitator |
| EMMI | EVA man-machine interface |
| EMO | Engineering Management Office |
| EMPEV | Emergency Manual PEV |
| EMS | Emergency Medical Service |
| EMS | Element Management System |
| EMS | Emergency Medical Services |
| EMS-R | European Mission Support (room) Russia |
| EMSA | European Moscow Support Room |
| EMSR | ESA Mission Support Room in MCC-M |
| EMT | Emergency Medical Technology |
| EMTGO | ExoMars Trace Gas Orbiter |
| EMU | Extravehicular Mobility Unit |
| EN | Execution Note |
| ENA | Enabled |
| ENBL | Enable |
| ENCAP | Encapsulation |
| ENCWG | ESA-NASA GS Coordination Working Group (sub-panel of ISS GSCB) |
| ENG | Electronic News Gathering Service |
| ENG | Engineering |
| ENOC | Emergency Network Operations Center |
| EO | Earth Orbiter |
| EO | Engineering Office |
| EO | Equal Opportunity |
| EO-1 | Earth Observing-One Mission |
| EO-1 | Earth Orbiter – 1 |
| EOC | Emergency Operations Center |
| EOCC | Emergency Operations Control Center |
| EODF | European Operations Data File |
| EOF | Experiment Operations Facility |
| EOL | end-of-life |
| EOL | end of life |
| EOL | end of lifetime |
| EOM | End of Mission |
| EOMS | Earth Orbiting Multi-mission Services |
| EONS | Education Opportunities in NASA STEM |
| EOO | Experiment Of Opportunity |
| EOP | end of packet |
| EOP | end of packet marker |
| EOPO | Equal Opportunities Program Office |
| EOR | Electric Orbit Raising |
| EOR | Earth Orbit Rendezvous |
| EOS | Earth Observing System |
| EOS | Emergency Oxigen System |
| EOS | emergency oxygen system |
| EOS-ALT | Earth Observation System - Altimetry |
| EOS-AM | Earth Observation System - At Morning |
| EOS-AM-1 | Earth Observing System (Morning) |
| EOS-CHEM | Earth Observing System (Chemistry) |
| EOS-CHEM | Earth Observation System - Chemistry |
| EOS-LAM | Earth Observation System - Laser Altimetry Mission |
| EOS-PM | Earth Observation System - Past Morning |
| EOSDIS | Earth Observing System Data & Information System |
| EOSDIS | Earth Observing System Data Information System |
| EOSP | Earth Observing Scanning Polarimeter |
| EOSP | Electronic Only Support Plan |
| EOTP | Enhanced ORU Temporary Platform (SPDM) |
| EOWG | EOS Operations Working Group |
| EP | Equivalent Person |
| EP | Earth Probe |
| EP | Electronics Platform |
| EP | Education Programs |
| EPA | Environmental Protection Agency |
| EPB | Equipped Propulsive Bay |
| EPC | Electronic Pump Controller |
| EPCB | Execute Planning Control Board |
| EPCE | electrical power-consuming equipment |
| EPCRA | Emergency Planning and Community Right-to-know Act |
| EPDM | ethylene propylene diene monomer |
| EPDS | Electrical Power Distribution System |
| EPE | Energetic Particles Explorer |
| EPF | External Payload Facility |
| EPFM | elastic-plastic fracture mechanics |
| EPG | Electrical Power Group |
| EPGN | EOS Polar Ground Network |
| EPIC | European Photon Imaging Camera on the ESA X-ray Multi-Mirror (XMM) mission |
| EPIC Team | European Planning & Increment Coordination Team |
| EPICS | Electrolysis Performance Improvement Concept Study |
| EPIP | Execute Planning Implementation Plan |
| EPIRB | Emergency Position-Indicating Radio Beacon |
| EPM | Equipped Pressurized Module |
| EPM | European Physiology Module |
| EPMA | Evaluation, Performance Monitoring, & Accountability (NASA, Education) |
| EPMT | Exploitation Project Management Team |
| EPO | Education Payload Operations |
| EPO | Education Payload Operation Greenhouse |
| EPOCh | Extrasolar Planet Observations & Characterization |
| EPOCh | Extrasolar Planet Observations and Characterization |
| EPOXI | Extrasolar Planet Observation & Deep Impact Extended Investigation |
| EPPL | European preferred parts list |
| EPR | ethylene propylene rubber |
| EPR | Engineering Peer Review |
| EPROM | erasable programmable read only memory |
| EPS | Electrical Power System |
| EPS | Emergency Planning Subcommittee (under the IRAC) |
| EPSCoR | Experimental Program to Stimulate Competitive Research |
| EPT | European Planning Team |
| EQM | engineering qualification model |
| EQSR | equipment qualification status review |
| EQUARS | Equatorial Atmosphere Research Satellite |
| EQUULEUS | Equilibrium Lunar-Earth point 6U Spacecraft |
| ER | Eastern Range (was ETR) |
| ER | Eastern Range |
| ER&T | engineering research & technology |
| ERA | European Robotic Arm |
| ERA | Environmentally Responsible Aviation |
| ERASMUS | USOC at ESTEC |
| ERAST | Environmental Research Aircraft & Sensor Technology |
| ERB | Engineering Review Board |
| ERBE | Earth Radiation Budget Experiment |
| ERBS | Earth Radiation Budget Satellite |
| ERC | electrical rule check |
| ERCP | External Robotics Control Processor |
| ERCS | Emergency Rocket Communication System |
| ERD | Experiment Requirements Document |
| ERD | Exploration Research & Development |
| ERE | Exospheric Radiation Experiment |
| ERFNET | European Radiation Facilities Network |
| ERM | Experiment Reference Model |
| EROS | Earth Resources Observation Systems |
| EROS | Earth Resources Observation System |
| ERP | Engineering Review Panel |
| ERPS | EOS Real-Time Processing System |
| ERR | Engineering Review Report |
| ERRRIS | E-Region Rocket radar Instability Study |
| ERS | European Space Agency Remote Satellite |
| ERS | Earth Resources Satellite (as in ERS-1) |
| ERS | European Remote Sensing Satellite |
| ERS | Environmental Research Satellite |
| ERSA | ESA Radiation Sensors Array |
| ERT | Emergency Response Team |
| ERTE | Emergency Return to Earth |
| ERTS | Earth Resources Technological Satellite |
| ERV | Earth Return Vehicle |
| ES | exposed section |
| ES | European Simulation |
| ES&A | Engineering Study and Analysis |
| ESA | GS ESA Ground Segment |
| ESA | European Space Agency |
| ESA | Earth Science Application |
| ESA | Earth Sensor Assembly (ICS-EF) |
| ESA BME | ESA Biomedical Engineer |
| ESA MD | ESA Mission Director |
| ESA MED OPS | ESA Medical Operations |
| ESA-MD | ESA Mission Director |
| ESA-OM | ESA Operations Manager |
| ESA-OMT | ESA Operations Management Team |
| ESABASE | engineering tool to support spacecraft mission & spacecraft platform design |
| ESAS | Exploration Systems Architecture Study |
| ESB | Enterprise Service Bus |
| ESC | Electronic Still Camera |
| ESC | Electronic Systems Command |
| ESC | Executive Safety Committee |
| ESC | Engineering Support Centre (Airbus DS Bremen & Friedrichshafen, ALTEC) |
| ESC | Engineering Support Center |
| ESC | EFSystem Controller (JEF) |
| ESCAPE | Earth Science CubeSat for Advanced Payload Experiments |
| ESCC | European Space Component Coordination |
| ESCC | European space components coordination |
| ESCG | Engineering and Science Contract Group |
| ESD | Earth Science Division |
| ESD | Exploration Systems Development |
| ESDIS | Earth Science Data Information System |
| ESDR | Earth System Data Records |
| ESDU | engineering sciences data unit |
| ESE | Earth Science Enterprise |
| ESEL | EVA Support Equipment List |
| ESEO | European Student Earth Orbiter |
| ESF | Erasmus Support Facility |
| ESG | Executive Steering Group |
| ESH | equivalent Sun hour |
| ESIS | European Space Information System |
| ESM | European Service Module for NASA’s Orion spacecraft |
| ESM | Earth Systematic Mission |
| ESM | Earth Systematic Missions |
| ESMC | Eastern Space & Missile Center |
| ESMD | Exploration Systems Mission Directorate |
| ESMDB | European Space Materials Database |
| ESMP | Earth Systematic Missions Program |
| ESMS | Earth Science Multi-Mission Services |
| ESO | European Southern Observatory |
| ESOC | European Space Operations Centre |
| ESP | external stowage platform |
| ESPAD | ESP Attachment Device |
| ESPRIT | European System Providing Refueling, Infrastructure, and Telecommunications |
| ESPRIT | European System Providing Refueling, Infrastructure & telecommunication |
| ESR | Experiment Scientific Requirements |
| ESR | Engineering Support Room |
| ESRIN | European Space Research Institute |
| ESRO | European Space Research Organisation |
| ESRS | Environmental Science Research Satellite |
| ESRT | Exploration Systems Research and Technology |
| ESS | Earth Science Subcommittee (of the NASA Advisory Committee) |
| ESS | Engineering Support Systems |
| ESS | Earth System Science |
| ESSA | Environmental Science Services Administration |
| ESSC | Early Station Support Computer |
| ESSMDM | Enhanced Space Station MDM |
| ESSP | Earth System Science Pathfinder |
| EST | Eastern Standard Time |
| EST | Experiment Sequence Test |
| EST | Engineering Support Team |
| EST. NTE Value | Estimated Not To Exceed Value |
| ESTEC | European Space Research & Technology Center |
| ESTER | Earth Science Toward Exploration Research |
| ESTL | Electronic Systems Test Laboratory |
| ESTO | Earth Science Technology Office |
| ESTP | Earth Science Technology Program |
| ESTRACK | ESA Tracking Network |
| ESnet | Department of Energy Science Network |
| ET | (Shuttle) External Tank |
| ETA | Estimated Time of Arrival |
| ETC | European Transport Carrier |
| ETC | Estimate-to-Complete |
| ETCS | external thermal control system |
| ETD | Exploration Technology Development |
| ETDD | Enabling Technology Development & Demonstration |
| ETDP | Exploration Technology Development Program |
| ETE | End to End |
| ETE | End-to-End |
| ETF | Electrical Translation Fixture |
| ETFE | ethylene tetrafluoroethylene |
| ETFE | ethylene-tetrafluoroethylene copolymer |
| ETFE | ethylene-tetrafluorethylene (Tefzel) |
| ETGT | Extended TDRS Ground Terminal |
| ETHOS | Environmental & Thermal Operating Systems Officer |
| ETLA | Extended Three Letter Acronym |
| ETM | Electrical Test Model (Columbus) |
| ETM+ | Enhanced Thematic Mapper Plus |
| ETO | ethylene oxide |
| ETOV | Earth-to-orbit vehicle |
| ETR | Eastern Test Range |
| ETR | EXPRESS Transportation Rack |
| ETRIP | Expedition Training Requirements Integration Panel |
| ETS | Engineering Test Satellite |
| ETS | EOSDIS Test System |
| ETSD | device,EVA tool stowage d. (tool box) |
| ETSD | external tool stowage device |
| ETU | Engineering Test Unit |
| ETVC | Elbow TV Camera (JEMRMS) |
| ETVCG | external television camera group |
| EU | Expected Utility |
| EU | Engineering Unit |
| EUE | experiment unique equipment |
| EUL | Enhanced Use Lease |
| EUMETSAT | European Organization for the Exploitation of Meteorological Satellites |
| EUMETSAT | European Meterological Satellite |
| EUROCOM | European Communicator |
| EUS | Exploration Upper Stage |
| EUT | equipment under test |
| EUTAS | Enhanced Universal Trunnion Attachment System (ESP attach point) |
| EUV | Extreme Ultraviolet Variability |
| EUVE | Extreme UltraViolet Explorer |
| EV | Earned Value |
| EV | extravehicular |
| EV | Earth Venture |
| EV CM | EVA crewmember |
| EV-CPDS | extravehicular-charged particle directional spectrometer |
| EVA | Extravehicular Activity |
| EVA | Extra-Vehicular Activity |
| EVARM | EVA Radiation Monitoring |
| EVAS | extravehicular attachment structure |
| EVE | EUV Variability Experiment |
| EVE | Elbow Vision Equipment |
| EVE | Elbow Vision Equipment (JEMRMS) |
| EVG | EVA Group |
| EVM | Earned Value Management |
| EVMS | Earned Value Management System |
| EVR | extravehicular robotics |
| EVS | Earth (Science) Venture Class Sub-orbital projects |
| EVS | Employee Viewpoint Survey |
| EVSU | external video switch unit |
| EVTR | Environmental Verification and Test Requirements |
| EVi | Earth (Science) Venture Class Instruments for orbital missions of opportunity |
| EWACS | Emergency, Warning, Advisories & Caution System |
| EWACS | Emergency |
| EWBS | Expanded Work Breakdown Structure |
| EWCA | Emergency, Warning, Caution & Advisory |
| EWOC | European Weekly Operations Conference |
| EX | Explorer Missions |
| EXCAN | External Columbus Antenna Assembly |
| EXCEDE | Excitation by Electron Deposition |
| EXE | Execution |
| EXES | Echelon-Cross-Echelle Spectrograph |
| EXP | Expedition |
| EXPL | expression language |
| EXPR | EXPRESS Rack |
| EXPRESS | Experiment Re-entry Space System |
| EXPRESS | expediting the processing of experiments to Space Station |
| EXPRESS | EXpedite PRocessing of Experiments to the Space Station |
| EZ CR | Easy Change Request |
| Ea | activation energy |
| EarthCARE | Earth Clouds, Aerosols & Radiation Explorer |
| Eb/No | Energy per Bit-To-Noise Power Spectral Density Ratio |
| EcAMSat | E. coli AntiMicrobial Satellite |
| Eff | efficiency |
| Elect | electronic |
| Emerg. | emergency |
| Ena | enable |
| Engineering | UCC |
| Ent | entry |
| Envir | environment (living,habitation) |
| Envisat | Environment Satellite |
| Envisat | (European environmental satellite) |
| EoC | End of Contract |
| EoD | Exceed on Demand |
| Equip | equipment |
| Equiv | equivalent |
| EscaPADE | Escape & Plasma Acceleration & Dynamics Explorers |
| Est | estimate |
| Estop | Emergency Stop |
| EtEGS | End-to-End Ground Segment |
| EuTEF | European Technology Exposure Facility |
| Eureca | European Retrievable Carrier |
| Euro | European |
| Euro | European Currency Unit |
| Eutelsat | European Telecomunication Satellite |
| Evap | evaporator |
| Ex-Alta | Experimental Albertan |
| ExCB | FOD Exploration Control Board |
| ExEP | Exoplanet Exploration Program |
| ExMC | Exploration Medical Capability |
| ExMU | EXPRESS memory unit |
| ExP | EXPRESS pallet |
| ExPA | EXPRESS pallet adapter |
| ExPCA | EXPRESS pallet control assembly |
| ExPCP | Execute Level Planning Control Panel |
| ExPRESS | EXpedite the PRocessing of Experiments to the Space Station |
| ExPS | EXPRESS pallet system |
| ExPeRT | Exploration Prepartion, Research & Technology |
| ExSD | EXPRESS stowage drawer |
| Exec | execute |
| Exos | Exospheric Satellite |
| Exosat | European X-Ray Observatory Satellite |
| Exp | experiment |
| Ext | extend |
| Ext | extension |
| Ext | external |
| F | actuation force |
| F&PR | Facilities and Planning Requirements |
| F&T | Frequency & Timing |
| F-O | fiber-optic |
| F/R | Frequency-Off Carrier to Symbol Rate Ratio |
| F/S | Flight Segment |
| F/W | Firewall |
| F2 | Functional Level 2 (System avionics drawing) |
| FA | Facility |
| FA | Fundamental Aeronautics |
| FAA | Federal Aviation Administration |
| FAC | Full Aperture Calibrator |
| FACA | Federal Advisory Committee |
| FACS | Front cone Attitude Control System |
| FAD | Formulation Authorization Document |
| FAD | failure assessment diagram |
| FADS | Flight Assignment Data Sheet |
| FAI | first article inspection |
| FAME | Full-sky Astrometric Mapping Explorer |
| FAP | Fundamental Aeronautics Program |
| FAQ | Frequently Asked Questions |
| FAR | Federal Acquisitions Requirements |
| FAR | Final Acceptance Review |
| FAR | Flight Acceptance Review |
| FAR | Federal Acquisition Regulation |
| FARM | frame acceptance & reporting mechanism |
| FARO | Flare Activated Radio-biological Observatory |
| FAS | Flight Application Software |
| FAS | Frequency Assignment Subcommittee (under the IRAC) |
| FAST | Fast Auroral SnapshoT explorer |
| FASTRAC | Formation Autonomy Spacecraft with Thrust, Relnav, Attitude & Crosslink |
| FASTRAD | sectoring analysis software for space radiation effects |
| FASat | Fuerza Aéra de Chile Satellite |
| FAT | File Allocation Table |
| FAT | Factory Acceptance Test |
| FAT | factory acceptance testing |
| FBE | Fundamental Biology Experiment |
| FBM | French Brazilian Microsatellite |
| FBS | Functional Breakdown Structure |
| FC | fuel cell |
| FCAS | Flight Controller Application Software |
| FCB | functional configuration baseline |
| FCC | Federal Communications Commission |
| FCDAS | Fairbanks Command and Data Acquisition Station |
| FCDP | Frequency Comparison & Distribution Package (ACES) |
| FCF | fluids & combustion facility |
| FCF | Fluids & Combustion Facility (ISS) |
| FCI | fracture critical item |
| FCI | fracture-critical item |
| FCIL | fracture-critical items list |
| FCL | fold-back current limiter |
| FCL | Flight Control Laboratory |
| FCM | Flight Control Monitoring (Function) |
| FCM | Flight Control & Monitoring |
| FCMS | fluid crystal management system |
| FCO | Flight Control Officer |
| FCOH | Flight Control Operations Handbook |
| FCP | flight control procedure |
| FCR | Future Communications Requests |
| FCR | Facility Change Request |
| FCR | Flight Control Room |
| FCS | flight crew system |
| FCSI | final customer source inspection |
| FCT | Flight Control Team |
| FCT web | Flight Control Team web |
| FCV | Flow Control Valve |
| FCV | valve,Flow Control Valve |
| FCV | functional configuration verification |
| FD | flight day |
| FD | Flight Director |
| FD | Flight Dynamics |
| FDA | Food & Drug Administration |
| FDA | Food and drug Administration |
| FDCF | Flight Design Computational Facility |
| FDD | Flight Dynamics Division |
| FDDI | Fiber Distributed Data Interface |
| FDF | Flight Data File |
| FDF | Flight Dynamics Facility |
| FDFMP | Flight Data File Management Plan |
| FDIR | fault detection, isolation, & recovery |
| FDIR | Fault (Failure) Detection,Isolation,& Recovery |
| FDIR | Fault/Failure Detection,Isolation,& Recovery |
| FDM | Flight Design Manager |
| FDM | Fault Detection & Management |
| FDMA | Frequency Division Multiple Access |
| FDO | Flight Directors Office |
| FDO | Flight Director Office |
| FDO | Fee Determination Official |
| FDOA | Flight Dynamics Operations Area |
| FDP | File Data Processing |
| FDPA | flight dynamics planning & analysis |
| FDPC | Flight Dynamics Product Center |
| FDS | fire detection & suppression |
| FDSDIC | Flight Dynamics Systems Development and Integration Center |
| FDU | telecommand frame data unit |
| FE | Flight Engineer |
| FE-1 | Flight Engineer-1 |
| FEA | finite element analysis |
| FEC | Forward Error Correction |
| FECF | Frame Error Control Field |
| FEE | Front End Equipment |
| FEEP | field emission electric propulsion |
| FEIT | Flight Element Integrated Test |
| FEM | finite element methods |
| FEM | finite element model |
| FEMA | Federal Emergency Management Agency |
| FEP | Front-End Processor |
| FEP | fluoroethylene-propylene |
| FEP | fluorinated ethylene propylene |
| FEPC | Front-End Processor Consolidation |
| FEPS | Fiche d’étude de problème soulevé |
| FER | frame error rate |
| FES | Front End Software |
| FESL | failure effect severity list |
| FESS | flywheel energy storage system |
| FET | field effect transistor |
| FEU | Flight Electronic Unit |
| FF | fresh food |
| FF | free flyer |
| FFGF | Free-Flyer Grapple Fixture |
| FFI | Forsvarets ForskningsInstitutt (Norwegian Defense Research Establishment) |
| FFP | Firm-Fixed-Price |
| FFQ | food frequency questionnaire |
| FFRDC | Federally Funded Research and Development Center |
| FFT | Fast Fourier Transform |
| FGB | Functional Cargo Block |
| FGB | Functional Cargo Block (Russian), Zarya Control Module |
| FGM | Fluxgate Magnetometer (Thermal Emission Imaging System instrument) |
| FGM | Fleet and Ground Management |
| FGS | Fine Guidance Sensors (on HST) |
| FGS-TF | Fine Guidance Sensor - Tunable Filter |
| FGSE | fluidic ground support equipment |
| FGST | Fermi Gamma-ray Space Telescope |
| FGST | Fermi Gamma-ray Space Telescope (formerly: GLAST,Gama Ray Large Area Space Telescope) |
| FHN | Friedrichshafen |
| FHRC | Flex Hose Rotary Coupler |
| FHST | Fixed Head Star Trackers (on HST) |
| FID | function identifier |
| FIE | Formal & Informal Education (NASA, Education) |
| FIFI | LS Field Imaging Far-Infrared Line Spectrometer |
| FIFO | first in first out |
| FIFO | first in first out memory |
| FINESSE | First Infrared Exoplanet Spectroscopy Survey Explorer |
| FIP | Federal Information Processing |
| FIPS | Federal Information Processing Standard |
| FIR | Far InfraRed |
| FIR | fluids integrated rack |
| FIRE | Flight Investigation of Re-Entry |
| FIRMR | Federal Information Resources Management Regulations |
| FIRST | Far Infra Red Space Telescope |
| FIST | Final Integrated System Test |
| FIT | Fault Isolation Test |
| FIT | failure in time |
| FITS | Flexible Image Transport System |
| FIW | Failure/Impact/Workaround |
| FL | deliverable output force |
| FLAP | Flight AP (Automated Procedure) |
| FLAP | Flight automated procedure |
| FLAP | Fluid Line Anchor Patch |
| FLEX | control of flexible construction systems |
| FLEX | Fluorescence Explorer |
| FLEX-2 | FLame Extinguishment EXperiment-2 |
| FLITECAM | First Light Infrared Test Experiment Camera |
| FLL | Flight Loads Laboratory |
| FLLI | fracture-limited life item |
| FLLI | fracture limited life item |
| FLLIL | fracture-limited life items list |
| FLSA | Fair Labor Standards Act |
| FLT | Flight |
| FLTSATCOM | Fleet Satellite Communication |
| FLUKA | Fluktuierende Kaskade (Fluctuating Cascade) Monte Carlo radiation transport code |
| FM | Facility Management |
| FM | Frequency Modulation |
| FM | Functional Managers |
| FMA | Final Mission Analysis |
| FMC | computer,Flight Management Computer (CST-100) |
| FMD | Facilities Maintenance Division |
| FMEA | failure modes effects analysis |
| FMECA | failure modes effects & criticality analysis |
| FMECA | Failure Mode Effects & Criticality Analysis |
| FMG | Frequency Management Group |
| FMI | Finnish Meteorological Institute |
| FMM | functional mathematical model |
| FMM | Financial Management Manual |
| FMON | functional monitoring |
| FMP | Future Mission Planning |
| FMR | Financial Management Requirement |
| FMS | Financial Management System |
| FMSA | Fault Management & System Autonomy |
| FMT | File/Memory Transfer (loop) |
| FO | Follow On (to a mission) |
| FO | Fuji Oscar |
| FOC | Faint Object Camera (on HST) |
| FOCP | Flight Operations Control Panel |
| FOD | Flight Operations Directorate (formerly: MOD,Mission Operations Directorate) |
| FOD | foreign object debris |
| FOIA | Freedom of Information Act |
| FOM | Figure of Merit |
| FOM | flight operations manual |
| FOOM | Flight Operations Organization Meeting |
| FOOT | Foot/Ground Reaction Forces During Space Flight |
| FOP | frame operation procedure |
| FOP | flight operation plan |
| FOP | flight operations plan |
| FOR | Flight Operations Review |
| FORCAST | Faint Object InfrRed CAmera for the SOFIA Telescope |
| FORP | Fuel and Oxidizer Reaction Product |
| FORTE | Fast On Orbit Recording of Transient Events |
| FORTRAN | Formula Translation |
| FOS | Flight Operations Segment/System |
| FOS | Faint Object Spectrograph (on HST) |
| FOSU | factor(s) of safety at ultimate |
| FOSU | ultimate design factor of safety |
| FOSY | factor(s) of safety at yield |
| FOSY | yield design factor of safety |
| FOT | Flight Operations Team |
| FOV | Field Of View |
| FP | flat pack |
| FP | fixed price |
| FP | flat pack package |
| FPA | Focal Plane Array |
| FPD | Flight Projects Directorate |
| FPGA | field programmable gate arrays |
| FPGA | field-programmable gate array |
| FPGA | field programmable gate array |
| FPI | Fast Plasma Investigation |
| FPLL | Flight Planning Load Limit (for a PL robotic operation) |
| FPMR | Federal Property Management Regulation |
| FPMU | Floating Potential Measurement Unit |
| FPN | fix pattern noise |
| FPO | Fleet Post Office |
| FPO | Flight Program Overview |
| FPP | Floating Potential Probe |
| FPP | Fluid Pump Package (JEF) |
| FPP | Field Programmable Processor |
| FPQ | Fixed Pedestal Q-Type Radar |
| FPR | Federal Procurement Regulation |
| FPS | Flight Planning System |
| FPWG | Flight Program Working Group |
| FQR | Formal Qualification Review |
| FQR | flight qualification review |
| FQT | Formal Qualification Test |
| FR | France |
| FR | Flash Report |
| FR | Frame Relay |
| FR | Flight Rule |
| FR4 | type of epoxy resin for PCBs |
| FRA | feasibility & risk analysis report |
| FRAC | frequency response assurance criterion |
| FRC | Facility Responsible Center |
| FRC | Flight Research Center (old name for DFRC) |
| FRCB | Flight Rule Control Board |
| FRCR | Flight Rule Change Request |
| FRCS | forward reaction control system |
| FRD | Face Requirement Document |
| FRED | Functional Readaptive Exercise Device |
| FRF | frequency response function |
| FRGF | Flight Releasable Grapple Fixture |
| FRITCS | Failure Recovery for ITCS |
| FRP | fibre reinforced plastics |
| FRR | Flight Readiness review |
| FRR | Flight-Readiness Review |
| FRS | Failure Reporting System |
| FS | First Stage |
| FS | Flight Surgeon |
| FS | flight spare |
| FS | functional specification |
| FSA | Factory Service Agreement |
| FSA/SOW | Flight Project Support Office Support Agreement/Statement of Work |
| FSB | Fundamental Space Biology |
| FSC | Facility Support Center |
| FSD | Full-Scale Development |
| FSDP | flight safety data package |
| FSE | Flight Support Equipment |
| FSF | Factory Support Facilities |
| FSF | ATV Flight Software Facility (in Les Mureaux) |
| FSI | fluid structure interaction |
| FSL | Fluid Science Laboratory |
| FSM | Flight Segment Manager |
| FSO | Facility Security Officer |
| FSP | Flight Project Support Office Support Program |
| FSR | Flight Safety Review |
| FSR | Financial Status Review |
| FSS | Fine Solar Sensor (ICS-EF) |
| FSS | Fixed Service Structure |
| FSW | Fanhui Shi Weixing |
| FSW-EP | Flight Software Execution Platform |
| FT | Functional Test |
| FT | fault tree |
| FTA | fault tree analysis |
| FTC | Fault Tolerant Computer |
| FTC | Fluid Transfer Coupling or Connector |
| FTE | Full Time Equivalent |
| FTE | Full Time Equivalency |
| FTETTM | From The Earth To The Moon |
| FTF | Forward Transfer Frame |
| FTIR | Fourier transform infrared |
| FTIR | Fourier transform infrared (spectrometry) |
| FTL | Faster Than Light |
| FTP | File Transfer Protocol |
| FTR | Fault Tolerant Region |
| FTRR | Flight Test Readiness Review |
| FTS | Frequency and Timing Subsystem |
| FTS | Flight Telerobotic Servicer |
| FTS | Federal Telecommunications System |
| FTS 2000 | Federal Telecommunications System 2000 |
| FTS* | Flight Termination System |
| FTTA | Federal Technology Transfer Act |
| FTV | Flight Test Vehicle |
| FTXS | FDDI Transmission System |
| FU | Flight Unit |
| FU/SU | Functional Unit / Software Unit |
| FULL | full control word |
| FUSE | Far Ultraviolet Spectroscopy Explorer |
| FUSE | Far Ultraviolet Spectroscopic Explorer |
| FUV | Far Ultraviolet |
| FW | Firewall |
| FWD | Forward |
| FWD,F; F | forward; Fwd |
| FWDU | Flight Window Definition Utility (obsolete) |
| FWHM | Full Width at Half Maximum |
| FY | Fiscal Year |
| FY | Feng Yun |
| FYI | For Your Information |
| Faisat | Final Analysis Inc. Satellite |
| Falcon-ODE | Falcon Orbital Debris Experiment |
| Fdbk | feedback |
| FedSat | Federation Satellite |
| Fld | field (area) |
| Flg | flag |
| Fltr | filter |
| Fmin | minimum actuator force required |
| For | force |
| Ftu | design tensile ultimate strength (in MPa) |
| Fty | design tensile yield strength (in MPa) |
| Fu | fuel |
| Func | function |
| Fxd | fixed |
| G | Gravity |
| G&A | General and Administrative |
| G&A | general & administrative |
| G-Z | DDS Ground Zone |
| G.M.T. | Greenwich Mean Time |
| G/T | ratio of antenna gain to system noise temperature |
| G/T | Gain to Noise Temperature Ratio |
| GAGAN | GPS Aided Geo Augmented Navigation |
| GAIA | Global Astrometric Interferometer for Astrophysics |
| GALEX | Galaxy Evolution Explorer |
| GAMES | Gravity & Magnetic Earth Surveyor |
| GAO | Government Accountability Office |
| GAS | Get-Away Special |
| GASMAP | gas analysis system for metabolic analysis of physiology |
| GASPACS | Get Away Special Passive Attitude Control Satellite |
| GATOSS | Global Air Traffic Awareness & Optimizing through Spaceborne Surveillance |
| GATV | Gemini Agena Target Vehicle |
| GAVRT | Goldstone Apple Valley Radio Telescope |
| GBF | gravitational biology facility |
| GBMS | Glenn Research Center Business Management System |
| GBRA | Ground Based Radio Astronomy |
| GBRS | Generic Block Recording System |
| GBT | Green Bank Telescope |
| GC | Ground Controller |
| GCA | GAS Conditioning Assembly |
| GCC | flight-control ground segment |
| GCD | Game Changing Development |
| GCE | Ground Control Equipment |
| GCF | Ground Communications Facility |
| GCI | Ground Communications Infrastructure |
| GCM | GPS Control & Monitor |
| GCM | Ground Control Message |
| GCMR | Ground Configuration Message Request |
| GCP | Ground Command Procedure |
| GCP | Guided Crew Procedure |
| GCP | Goddard Corporate Park |
| GCR | galatic cosmic radiation |
| GCRS | geocentric celestial reference system |
| GCS | Ground Communications Schedule |
| GCS | Ground Communication System |
| GCT | Ground Control Team |
| GCTC | Gagarin Cosmonaut Training Center (in Moscow) |
| GCTC | Gagarin Cosmonaut Training Center |
| GCU | Gateway Control Unit |
| GCVS | General Catalog of Variable Stars |
| GD | General Dynamics |
| GDGPS | Global Differential Global Positioning System |
| GDIR | general design & interface requirement |
| GDIS | Guam Data Interface System |
| GDMS | Goddard Directives Management System |
| GDOP | Geometric Dilution of Precision |
| GDRD | General Design Requirements Document |
| GDS | Great Dark Spot |
| GDS | Call sign for Goldstone, California Ground Network Tracking Station |
| GDS | Ground Data System |
| GDSCC | Goldstone Deep Space Communications Complex |
| GDSS | Gateway Docking System |
| GDSS | Global Decision Support System |
| GDU | Generation Data Unit |
| GE | General Electric |
| GEANT | Geometry & Tracking Monte Carlo radiation transport code |
| GEC | Geospace Electrodynamic Connections |
| GEM | Giotto Extended Mission |
| GEM | Galileo Europa Mission |
| GEM | Galileo Extended Europa Mission |
| GEMINI | GRC Environment for Modeling Integrated Network Infrastructure |
| GEMS | Gravity & Extreme Magnetism SMEX |
| GEN | General |
| GENSAA | Generic Spacecraft Analyst Assistant |
| GEO | Geosynchronous Equatorial Orbit |
| GEO | Geostationary Earth Orbit |
| GEO | Geosynchronous Earth Orbit |
| GEODESIC | Geo Electrodynamics & Electro Optical Detection of Electron & Suprathermal Ion Currents |
| GEOS | (3) Geodynamics Experimental Ocean Satellite |
| GEOS | (ESA) Geostationary Earth Orbit Satellite |
| GEOS | (Expl.) Geodetic Earth Orbiting Satellite |
| GEOTAIL | Geomagnetic Tail Laboratory |
| GERI | Gateway External Robotic Interface |
| GERS | Gateway External Robotic Systems |
| GES | DAAC GSFC Earth Science Distributed Active Archive Center |
| GESRP | Gateway ESA Safety Review Panel |
| GETS | FOD’s Gateway Element Training Simulation |
| GEVR | Gateway Extra-Vehicular Robotics |
| GEWEX | Global Energy and Water Exchanges project |
| GF | Grapple Fixture |
| GF(n) | Galois field consisting of exactly n elements |
| GFAC | Goldstone Frequency and Airspace Coordination |
| GFAS | Ground/Flight Application Software |
| GFAST | Ground/Flight Application Software Team |
| GFC | Guaranteed Funding for CCNs |
| GFE | government furnished equipment |
| GFI | ground fault interrupter |
| GFMRB | Ground Facilities MRB |
| GFO | Geosat Follow On |
| GFP | Government Furnished Property |
| GFY | Government Fiscal Year |
| GFZ | Geo Forschungs Zentrum |
| GG | gravity gradient |
| GGR&C | Generic Groundrules & Constraints Part 1 |
| GGSE | Gravity Gradient Stabilisation Experiment |
| GGT-G | Glutamyltransferase |
| GGTS | Gravity Gradient Test Satellite |
| GGr&C | ISS Generic Groundrules & Constraints Part 2 |
| GHB | Goddard Handbook |
| GHRS | Goddard High Resolution Spectrograph (on HST) |
| GHe | Gaseous Helium |
| GHz | Gigahertz |
| GICTF | Gateway Integrated Communication Test Facility |
| GIDEP | Government Industry Data Exchange Program |
| GIF | Graphics Interchange Format |
| GIFTS | Geostationary Imaging Fourier Transform Spectrometer |
| GIFTS-IOMI | Geosynchronous Imaging Fourier Transform Spectrometer - Indian Ocean METOC Imager |
| GIG | Global Information Grid |
| GIGSS | Gateway International Ground System Specification |
| GIOVE | Galileo In-Orbit Validation Element |
| GISAT | GEO Imaging Satellite |
| GISP | Gateway Integrated Spacecraft Performance WG |
| GITS | GSOC Issue Tracking System |
| GIVS | Gateway Integrated Vehicle Simulation |
| GIVUS | hich-accuracy rate sensor; a gyro-based devise that measures the angular rate vector. |
| GIWG | GPS International Working Group |
| GL | Government Led |
| GL | Government Leased |
| GL&C | Guidelines & Constraints |
| GLA | General Luminaire Assembly |
| GLAS | Geoscience Laser Altimeter System |
| GLAST | Gamma–ray Large Area Space Telescope (now Fermi Gamma-ray Space Telescope) |
| GLD | Goldstone Logistics Depot |
| GLOBE | Global Learning & Observations to Benefit the Environment |
| GLOMR | Global Low-Orbiting Message Relay |
| GLONASS | GLObal NAvigation Satellite System (Russia) |
| GLONASS | Globalnaya Navigationnaya Sputnikovaya Sistema |
| GLONASS | global navigation satellite system |
| GLOW | Gross Lift-Off Weight |
| GLS | Gateway Logistics Services |
| GLU | Glucose |
| GM | Ground Model |
| GMAT | General Mission Analysis Tool |
| GMAW | gas metal arc welding |
| GMBL; Gmbl | gimbal |
| GMC | Giant Molecular Cloud |
| GMI | GPM Microwave Imager (Global Precipitation Measurement instrument) |
| GMI | Goddard Management Instruction |
| GMM | geometrical mathematical model |
| GMO | Ground and Mission Ops |
| GMOD | GPS Modular |
| GMRT | Giant Meter-wave Radio Telescope |
| GMS | Geostationary Meteorological Satellite |
| GMSEC | Goddard Mission Services Evolution Center |
| GMSK | Gaussian minimum shift keying |
| GMT | Greenwich Mean Time (also called UT) |
| GMT | Greenwich Mean Time |
| GN | Ground Node |
| GN | Ground Networks |
| GN | Ground Network |
| GN&C | Guidance Navigation & Control |
| GN&C | guidance, navigation, & control |
| GN2 | Gaseous Nitrogen |
| GN2; GN | gaseous nitrogen |
| GNC | GNC engineer |
| GNC | Guidance Navigation & Control |
| GNC; GN&C | guidance,navigation & control (system) |
| GND | Ground |
| GNSS | global navigation satellite system |
| GNUG | Ground Network Users’ Guide |
| GO | Government Owned |
| GO | Gurwin Oscar |
| GO2 | Gaseous Oxygen |
| GO2; GOX | gaseous oxygen |
| GOCE | Global Ocean Circulation Explorer |
| GOCR | Ground Operations Control Room |
| GOES | Geostationary Operational Environmental Satellite |
| GOES | Geostationary Operational Environemental Satellite |
| GOES | Geostationary Orbiting Environmental Satellite |
| GOES-L | Geostationary Operational Environmental Satellite-L Series |
| GOES-R | Geostationary Operational Environmental Satellite-R Series |
| GOICP | Gateway Operations Integration Coordination Panel |
| GOIN | Global Observation Information Network |
| GOLF | GGreater Orbit, Larger Footprint |
| GOLF-TEE | GGreater Orbit, Larger Footprint – Technology Exploration Environment |
| GOM | Ground Operations Manager |
| GOP | Ground Operations Planner |
| GOR | Ground Operations Review |
| GOR | General Operations Room |
| GORR | Gateway Operational Groundrules & Requirements |
| GOS | Ground Operations Subsystem |
| GOSAT | Greenhouse Gases Observing Satellite |
| GOSIP | Government Open Systems Interconnection Profile |
| GOT | Glutamic-Oxaloacetic Transaminase (or aspartate aminotransferase) |
| GOT | Ground Operations Team |
| GOTS | Government Off the Shelf |
| GOX | Gaseous OXygen |
| GP | Gravity Probe |
| GP-B | Gravity Probe-B |
| GPC | General Purpose Computer |
| GPCB | Gateway Program Control Board |
| GPE | Government Provided Equipment |
| GPIM | Green Propellant Infusion Mission |
| GPIP | General Purpose Input |
| GPM | Global Precipitation Measurement |
| GPOD | Gateway Operations Concept Document |
| GPR | Goddard Procedural Requirements |
| GPRA | Government Performance and Results Act |
| GPRA | Government Performance & Results Act |
| GPS | Global Positioning System |
| GPSAA | GPSAntenna Assembly (PROX) |
| GPSD | Global Positioning System Directorate |
| GPT | Glutamic-Pyruvic Transaminase (or alanine aminotransferase) |
| GPVP | Generic Payload Verification Plan |
| GR | General Relativity |
| GR&A | Ground Rules & Assumption |
| GR&C | Ground Rules & Constraints |
| GR&C | generic groundrules, requirements, & constraints |
| GR&C | Ground Rules and Constraints |
| GRA | Ground Rules & Assumptions |
| GRAB | Gateway Risk Advisory Board |
| GRACE | Gravity Recovery and Climate Experiment |
| GRACE | Gravity Recovery & Climate Experiment |
| GRAIL | Gravity Recovery & Interior Laboratory |
| GRAIL | Gravity Recovery and Interior Laboratory |
| GRAM | global reference atmosphere model |
| GRAS | Geant4 Radiation Analysis for Space |
| GRB | Gamma Ray Burster |
| GRC | Glenn Research Center (NASA) |
| GRC | NASA John H. Glenn Research Center at Lewis Field |
| GRC | PBS Glenn Research Center–Plum Brook Station |
| GRC | Glenn Research Center (formerly: the Lewis Research Center) |
| GRC | Glenn Research Center |
| GREAT | German Receiver for Astronomy at Terahertz |
| GRGT | Guam Remote Ground Terminal |
| GRIFEX | GEO-CAPE ROIC In-Flight Performance Experiment |
| GRIM | Global Realtime Interactive Map |
| GRIP | Genesis & Rapid Intensification Processes |
| GRM | geometrically representative model |
| GRME | generalized relative measurement error |
| GRO | Gamma Ray Observatory (now CGRO) |
| GROUP-C | GPS Radio Occultation & Ultraviolet Photometer on a Cubesat |
| GRP | German Research Probe |
| GRS | Generic Recording System |
| GRS | Great Red Spot |
| GRS | Geophysical Research Satellite |
| GRS | German Research Satellite |
| GRS | Gamma Ray Spectrometer (on Mars Observer) |
| GRT | Generic Robotics |
| GRT | Generic Robotics Training |
| GRTS | GRO Remote Terminal System |
| GS | Ground Segment |
| GS | Ground Station |
| GS | Ground Support |
| GS | Ground System |
| GS | AD Ground Segment Active Directory |
| GS | Goldstone |
| GS-SRD | Ground Segment System Requirements Document |
| GSA | General Services Administration |
| GSAITP | ground segment AIT plan |
| GSBCA | General Services Administration Board of Contract Appeals |
| GSC | Guide Star Catalog (for HST) |
| GSCB | Ground Segment Control Board (ISS Multilateral Board; ESA Board) |
| GSCDR | ground segment critical design review |
| GSCRD | ground segment customer requirements document |
| GSDDF | ground segment design definition file |
| GSDE | Ground Systems Development Environment |
| GSDJF | ground segment design justification file |
| GSDO | Ground Systems Development & Operations |
| GSDP | ground safety data package |
| GSE | Ground Support Equipment |
| GSEHEX | Ground Support Equipment Heat Exhanger |
| GSEP | ground segment engineering plan |
| GSFC | Goddard Space Flight Center |
| GSFC | Goddard Space Flight Center (NASA) |
| GSI | Government Source Inspection |
| GSIF | Ground Station Interface Facility |
| GSIF | Ground System Interface Facility |
| GSM | Gas Supply Module |
| GSM | geocentric solar magnetospheric co-ordinates |
| GSM | Ground Segment Manager |
| GSMRB | Ground Segment MRB |
| GSO | geostationary orbit |
| GSO | geosynchronous orbit |
| GSOC | German Space Operations Center |
| GSOC | German Space Operation Center |
| GSOP | Ground System Operations Project |
| GSP | General Studies Programme |
| GSP | Ground Support Personnel |
| GSP-CB | Ground Support Personnel Control Board |
| GSPCB | Ground Support Personnel Certification Board |
| GSPDR | ground segment preliminary design review |
| GSQR | ground segment qualification review |
| GSR | Geosynchronous Satellite Report |
| GSR | Ground Safety Review |
| GSRD | ground segment requirements document |
| GSRR | Ground Segment Readiness Review |
| GSS | Generalized Support Software/System |
| GSS | ground segment supplier |
| GSSAP | Geosynchronous Space Situational Awareness Program |
| GSSR | Ground Segment Service Request |
| GSSR | Goldstone Solar System Radar |
| GSSRR | ground segment system requirements review |
| GSTB | Galileo System Test Bed |
| GSTDN | Ground Spaceflight Tracking and Data Network |
| GSTP | General Support Technology Programme |
| GSU | Ground Support Unit |
| GSVL | Gateway Software Verification Lab |
| GSVP | ground segment verification plan |
| GT | Ground Terminal |
| GTA | Ground Test Article |
| GTA | Guam Telephone Authority |
| GTAP | Ground Test AP (Automated Procedure) |
| GTAS | Generic Trending and Analysis System |
| GTAW | gas tungsten arc welding |
| GTD | Ground Test Demonstrator |
| GTD | Ground Test Demonstration |
| GTDM | Generic Time Division Multiplexed |
| GTDS | Goddard Trajectory Determination System |
| GTE | Global Tropospheric Experiment |
| GTO | Geostationary Transfer Orbit |
| GTOD | Greenwich True Of Data reference frame |
| GTPS | Groupe de Travail de Pyrotechnie |
| GTSIM | Generic Telemetry Simulator |
| GUCP | Gateway Utilization Coordination Panel |
| GUI | graphical user interface |
| GUSSTO | Galactic/Xgalactic Ultra long duration balloon Spectroscopic |
| GVCB | Gateway Vehicle Sys Int. Control Board |
| GVI | Global Village Idiot |
| GVM | Gabaritno-Vesovoi Maket |
| GW-Sat | George Washington Satellite |
| GWAC | Government Wide Acquisition Contract |
| GWAC | Government Wide Acquisition Contracts |
| GWDU | Ground Window Definition Utility |
| GaAs | gallium arsenide |
| Gbit/s | giga bits per second |
| GeV | Gigaelectron volt |
| GemStar | Global Electronic Messaging Star |
| Gen | generator |
| Georg | Geheimes Elektro-Optisches Reconnaissance System Germany |
| GiSAT | Global IP Satellite |
| GiaB | Gateway In A Box (implements FSW, supports interfacing to HW, runs GIVS) |
| GiaR | Gateway In A Rack (includes Avionics HW) |
| GigE | Gigabit Ethernet |
| Gr&C | Increment Specific Groundrules & Constraints Part 2 |
| Greb | Galactic Radiation Energy Background |
| Grp | group |
| Guid | guidance |
| Gy | gray |
| Gyro | gyroscope |
| H&S | Health & Status |
| H/W | Hardware |
| H/W; HW; HDW | hardware |
| H1 | Harness Level 1 (System avionics drawing) |
| HA | harness & other torque or force resistances |
| HAA | High Altitude Abort |
| HALCA | Highly Advanced Laboratory for Communication & Astronomy |
| HALCA | Highly Advanced Laboratory for Communications and Astronomy (also known as MUSES-B and VSOP) |
| HALO | Habitat & Logistics Outpost |
| HALOE | HALogen Occultation Experiment |
| HAO | High Altitude Observatory |
| HAP | High Altitude Program |
| HARP | HyperAngular Rainbow Polarimeter |
| HARS | HALO Air Revitalization System |
| HAS | HALO Audio Subsystem |
| HASP | HMS Ancillary Supply Pack |
| HAST | highly accelerated stress test |
| HAT | HSF Architecture Team |
| HATS | Headquarters Action Tracking System |
| HAUSAT | Hankuk Aviation University Satellite |
| HAVT | Hypersonic Air-breathing Vehicle Technologies |
| HAWC | High-resolution Airborne Wideband Camera |
| HAZ | heat affected zone |
| HAZMAT | Hazardous Materials |
| HB | handbook |
| HB | Hot Backup (MSS) |
| HB | Brinell hardness |
| HBCU | Historically Black Colleges and Universities |
| HBCU | Historically Black Colleges & Universities |
| HBM | human body model |
| HBP | Human Behaviour & Performance |
| HBTM | Hybrid Bispectral Threshold Method |
| HC | Hazard Control |
| HC-HPC | high current high power command |
| HC-MMS | High Capacity MMS |
| HCA | Humidity Control Assembly |
| HCD | human centred design |
| HCE | Heater Control Equipment (JEF) |
| HCED | Halley's Comet Experiment Deployable |
| HCI | Human Computer Interface |
| HCI | Hydrogen Chloride |
| HCIF | Hand Controller Interface |
| HCM | Heater Control Module |
| HCMG3X | momentum H of CMG3 in x direction |
| HCMG3Y | momentum H of CMG3 in y direction |
| HCMG3Z | momentum H of CMG3 in z direction |
| HCMM | Heat Capacity Mapping Mission |
| HCN | Hydrogen Cyanide |
| HCOR | High-Rate Communications Outage Recorder |
| HCP | Hardware Command Panel (ISS) |
| HCPA | Hot Plasma Composition Analyzer |
| HCS | Hard Capture System |
| HCU | Heater Control Unit |
| HCl | chloride acid |
| HD | Henry Draper catalog entry |
| HD | highly directable |
| HDI | high density interconnect |
| HDL | hardware description language |
| HDLC | High-Level Data Link Control |
| HDLP | High Density Lipoprotein (cholesterol) |
| HDPCG | high-density protein crystal growth |
| HDPE | high density polyethylene |
| HDR | high data rate |
| HDRM | Hold Down Release Mechanism |
| HDRS | High Data Rate System |
| HDSW | Hardware Dependent SW |
| HDTV | High Definition Television |
| HDTV | high-definition television |
| HE | Human Exploration |
| HE | Habitable Element |
| HEA | Habitable Element Adapter |
| HEAO | High Energy Astronomical Observatory |
| HEC | Human Exploration Capability |
| HECC | Human Exploration Control Centre |
| HECC | High End Computing Capability |
| HEDS | Human Exploration and Development of Space |
| HEDS | Human Exploration & Development of Space |
| HEF | High Efficiency |
| HEMT | High Electron Mobility Transistor |
| HEO | Human Exploration & Operations |
| HEO | Highly Elliptical Orbit |
| HEOMD | Human Exploration & Operations Mission Directorate |
| HEOMD | Human Exploration and Operations Mission Directorate |
| HEOS | Highly Eccentric Orbit Satellite |
| HEPA | high-efficiency particulate air filter |
| HEPA | high efficiency particulate air |
| HEPA | high efficiency particle air filter |
| HEPS | High Efficiency Power Supply (MAVEN) |
| HERMES | 3-D Monte Carlo radiation transport simulation code developed by Institut für Kernphysik Forschungszentrum Jülich GmbH |
| HESSI | High Energy Solar Spectroscopic Imager |
| HET | Human Exploration Telerobotics |
| HETC | High Energy Transport Code |
| HETE | High Energy Transient Experiment |
| HF | High Frequency |
| HF | High Frequency (f= 3 MHz 30 MHz) |
| HFE | hydro fluor ether (Per fluoro-n-butyl methyl ether) |
| HFE | human factors engineering |
| HFIT | Human Factors Integration Team |
| HGA | High Gain Antenna |
| HGD | Handgrip |
| HH&P | Human Health & Performance |
| HHC | Health & Human Countermeasures |
| HIAD | Hypersonic Inflatable Aerodynamic Decelerator |
| HICO | Hyperspectral Imager for the Coastal Ocean (HREP) |
| HIDRA | High Data Rate Architecture |
| HILAT | High Latitude Reseach Satellite |
| HIP | Human Interface Panel |
| HIP | Helmet Interchangeable Light |
| HIP | Hydrostatic indifferent point |
| HIPAA | Health Insurance Portability & Accountability Act |
| HIPO | High-speed Imaging Photometer for Occultation |
| HIRAAS | High Resolution Airglow / Aurora Spectroscopy Experiment |
| HIRAP | high-resolution accelerometer package |
| HIRDLS | High Resolution Dynamic Limb Sounder |
| HIRES | High Resolution Echelle Spectrometer |
| HIRS | High Resolution Infrared Radiation Sounder |
| HIS | Heavy Ion Sensor |
| HISUI | Hyperspectral Imager Suite |
| HITL | Human-in-the-loop |
| HITSAT | Hokkaido Institute of Technology Satellite |
| HK | Housekeeping |
| HK TM | telemetry,Housekeeping Telemetry (ATV) |
| HK TM | Housekeeping Telemetry (ATV) |
| HKIF | House-Keeping Interface (part of CD-MCS SA) |
| HL | High Limit |
| HLA | High Level Architecture (IEEE standard 1516-2010) |
| HLC | Heavy Lift Capability |
| HLCL | High Level Command Language |
| HLCS | HALO Lunar Communications System |
| HLIST | HE Launch Site Integrated Test |
| HLS | Human Landing Systems |
| HLV | Heavy Lift Vehicle |
| HM | HALO Mediator |
| HMC | Halley Multicolor Camera (on Giotto) |
| HMC | hydrogen master clock |
| HMD | Head Mounted Display (s.a. a VR headset) |
| HMD | Hardware Maintenance Depot |
| HME | Human Spaceflight Microgravity & Exploration (ESA directorate) |
| HME-GN | HME Ground Network |
| HME-GS | HME Ground Segment |
| HME-IS | HME Infrastructure Services |
| HMF | Hypergol Maintenance Facility |
| HMI | human machine interface |
| HMS | health maintenance system |
| HMST | Hazardous Materials Summary Table |
| HMT | hexamethylenetetramine |
| HMU | Harness Manufacturing Unit |
| HNSC | Hellenic National Space Committee (Greece) |
| HOMER | High Altitude Ozone Measuring & Educational Rocket |
| HOPE | H-2 Orbital Plane Experiment |
| HOSC | Huntsville Operations Support Center |
| HOTH | Houston Orion Test Hardware |
| HOTOL | HOrizontal TakeOff & Landing (a proposed SSTO craft) |
| HOU | Houston |
| HP | heat pipe |
| HPA | high power amplifier |
| HPA | Hand Posture Analyzer |
| HPBW | Half-Power Beamwidth |
| HPC | high power command |
| HPD | heat pipe diode |
| HPGA | high pressure gas assembly |
| HPGe | high-purity germanium |
| HPIW | High Pressure Industrial Water |
| HPO | HALO Project Office |
| HPOA | High Power Optical Amplifier |
| HPPG | High Priority Performance Goal |
| HPSC | Boeing Houston Product Support Center |
| HQ | Headquarters |
| HQ | NASA Headquarters |
| HR | Hertzsprung-Russell (diagram) |
| HR | Heart rate |
| HR | Hour |
| HR (S) | Hour(s) |
| HRC | Rockwell hardness |
| HRCA | Human Rated Compliance Assessment |
| HRD | High Rate Data |
| HRDL | High-rate (data) downlink |
| HRDL | high rate data link |
| HRDP | High-rate data processing |
| HRE | (Directorate of) Human Spaceflight & Robotic Exploration Programmes |
| HREDA | HRE Data Archive |
| HREL | Hold & Release Electronics |
| HREL | Hold and Release Electronics (JEMRMS) |
| HREP | HICO/RAIDS Experiment Payload (EF payload) |
| HREU | Hold and Release Electronics Unit |
| HRF | Human Research Facility |
| HRFM | high rate frame multiplexer |
| HRI | High Resolution Imager (on ROSAT) |
| HRJ | Hydro-treated Renewable Jet |
| HRM | high rate modem |
| HRM | High Rate Multiplexer |
| HRM | Hold and Release Mechanisms (three) (JEMRMS) |
| HRM | Hold and Release Mechanism |
| HRM | Heart rate monitor |
| HRMRB | Human Research Multilateral review board |
| HRMS | High Resolution Microwave Survey |
| HRN | I-HAB Harness |
| HRP | Human Research Program |
| HRS | Heat Rejection Subsystem |
| HRS | Human Restraint System |
| HRTS | High Resolution Telescope & Spectrograph |
| HS | hot structure |
| HSE | Heath Status Examination |
| HSF | Human Spaceflight |
| HSFO | Human Space Flight Operations |
| HSI | Hardware/Software Integration |
| HSIA | hardware-software interaction analysis |
| HSM | Health State Manager |
| HSMF | Headquarters Spectrum Management Forum |
| HSP | High Speed Photometer (on HST) |
| HSP | Health Stabilization Program |
| HSPAR | HALO Subcontractor Product Assuranec Requirement |
| HSPD | Homeland Security Presidential Directive |
| HSPP | Homeland Security Presidential Directive |
| HSR | Houston Support Room |
| HSRP | Hot Standby Routing Protocol |
| HSRT | Human Systems Research and Technology |
| HSSI | High Speed Serial Interface |
| HST | Hubble Space Telescope |
| HTC | Heat Transfer Coefficient |
| HTH | Hope This Helps |
| HTH-2 | Heat Transfer Host 2 |
| HTHL | Horizontal Takeoff Horizontal Landing |
| HTIF | hybrid circuit technology identification form |
| HTL | High Temperature Loop |
| HTL | high-temperature loop |
| HTML | Hyper-Text Markup Language |
| HTRB | high-temperature reverse bias |
| HTRB | high temperature reverse bias |
| HTTP | Hypertext Transfer Protocol |
| HTTPS | HyperText Transmission Protocol, Secure |
| HTV | HII Transfer Vehicle |
| HTV | H-2 transfer vehicle |
| HTVL | Horizontal Takeoff Vertical Landing |
| HU | Hosting Unit |
| HUT | Hopkins Ultraviolet Telescope (ASTRO package) |
| HV | High Voltage |
| HV-HPC | high voltage high power command |
| HVAC | heating, ventilation, air conditioning, & cooling |
| HVI | Hypervelocity Impact |
| HVR | Hardware Verification Review |
| HViDS | HOSC Video Distribution System |
| HW | Hardware |
| HWM | horizontal wind model |
| HX | heat exchanger |
| HXB | Heat Exchanger Bypass |
| HY | Haiyang |
| HYB2 | Hayabusa-2 |
| HYLAS | Highly Adaptable Satellite |
| HZE | particle of high atomic mass & high energy |
| Hab | Habitatation Module |
| Hab | habitation module |
| Haz | hazard |
| Hb | Hemoglobin |
| Hct | Hematocrit %PCV |
| HeDI | Helium Doppler Imager |
| HeRA | Hermes Robotic Arm |
| HeidelSat | Heidelberg Satellit |
| Hexapod | Hexapod Pointing System |
| HgCdTe | Mercury-Cadmium-Telluride (type of array used in many instruments) |
| Hi Volt,Hi V | high voltage |
| HiNCube | Høgskolen i Narvik CubeSat |
| HiNet | High-Speed Network |
| HiVHAc | High Voltage Hall Accelerator |
| HiakaSat | Hyperspectral Imaging, Aeronautical Kinematic Analysis Satellite |
| Hipparcos | High Precision Paralax Collecting Satellite |
| Hugo | Highly Unusual Geophysical Obeservations |
| HumSat-D | Humanitarian Satellite - Demonstrator |
| Hutsat | Helsinki University of Technology Satellite |
| HySIS | Hyper Spectral Imaging Spectrometer |
| HyTI | Hyperspectral Thermal Imager |
| Hyflex | Hypersonic Flight Experiment |
| HypIRI | Hyperspectral Infrared Imager |
| Hyper-X | Hypersonic Experiment |
| Hz | hertz |
| I | irradiated |
| I | &T Integration & Test |
| I | increment |
| I&T | Integration & Test |
| I&T | Integration and Testing |
| I&TO | Integration & Test Order |
| I-CCS | I-HAB Coolant Control System |
| I-HAB | International Habitation Module |
| I-V | current-voltage |
| I-load,ILoad | initial load |
| I/F | Interface |
| I/MI | Increment / Mission Integration |
| I/O | input/output |
| I/T | Information Technology |
| I2C | inter-integrated circuit |
| I3P | Information Technology Infrastructure Integration Program |
| IAA | intravehicular antenna assembly |
| IAC | International Astronautical Congress |
| IAC | Internal Audio Controller |
| IAE | Inflatable Antenna Experiment |
| IAF | Intelligent Alert Filtering |
| IAG | International Association of Geodesy |
| IAGA | International Association for Geomagnetism & Aeronomy |
| IAP | Increment Activity Plan |
| IAPFR | restraint,interoperable APFR |
| IAPPP | International Amateur/Professional Photoelectric Photometry |
| IAS | internal audio subsystem |
| IAS | Image Assessment System |
| IASB | Institute d'Aeronomie Spatiale de Belgique |
| IASB | Institute d’Aeronomie Spatiale de Belgique |
| IASI | Infrared Atmospheric Sounding Interferometer |
| IATA | international air transport association |
| IATR | Initial Architecture Technology Review |
| IAU | International Astronomical Union |
| IAUC | IAU Circular |
| IBAS | Interactive Basic Accounting System |
| IBDM | International Berthing & Docking Mechanism |
| IBEX | Interstellar Boundary Explorer |
| IBIS | Imager on Board the INTEGRAL Satellite |
| IBPD | Integrated Budget and Performance Document |
| IBPD | Integrated Budget & Performance Document |
| IBR | Integrated Baseline Review |
| IBSS-SPAS | Infrared Background Signature Survey - Shuttle Palette Satellite |
| IC | interconnected cell |
| IC | Institutional Committee |
| IC | integrated circuit |
| ICA | Innovative Concepts for Aviation |
| ICAM | Internal Camera |
| ICAM | Identity, Credential and Access Management |
| ICAO | International Civil Aviation Organization |
| ICATT | ISS Command & Telemetry Team |
| ICB | Integration Control Board |
| ICC | Integrated Computer Complex (Host Computer) |
| ICC | Integrated Command & Control |
| ICC | integrated cargo carrier |
| ICC | Integrated Control Center |
| ICC | Instrument Control Center |
| ICCN | Inter-center Council for Computer Networking |
| ICD | Interface Control Document |
| ICD | instrument control document |
| ICDC | ISS Communication Data Converter |
| ICE | International Cometary Explorer |
| ICE | ISS Characterization Experiment |
| ICE-Cap | Integrated Communications Extension Capability |
| ICECube | Ionospheric Scintilation Experiment Cubesat |
| ICESAT | Ice, Cloud & Land Elevation Satellite |
| ICESat | Ice, Cloud, and Land Elevation Satellite |
| ICEScape | Impacts of Climate change on the Eco-Systems & chemistry of the arctic pacific environment |
| ICG | International Committee on Global Navigation Satellite Systems (United Nations) |
| ICK | insert contaminant kit |
| ICM | Interim Command Module |
| ICM | interim control module |
| ICM | Increment Coordination Meeting |
| ICN | Inter Console Note |
| ICO | Intermediate Circular Orbit |
| ICON | Ionospheric Connection Explorer |
| ICP | Immediate Command Processor |
| ICPS | Interim Cryogenic Propulsion Stage |
| ICPSU | Interim Cryogenic Propulsion Stage Umbilical |
| ICR | Integration Change Request |
| ICRD | Infrastructure Configuration Requirements Document |
| ICRF | international celestial reference frame |
| ICRP | International Commission on Radiation Protection |
| ICRP | Independent Comprehensive Review Panel |
| ICRS | international celestial reference system |
| ICRU | International Commission on Radiation Units & Measurements |
| ICS | Inter-orbit Communication System (JEM) (Ka-band) |
| ICS | Inter-Orbit Communication System |
| ICS-EF | ICS unit installed at EF |
| ICSSC | International Communications Satellite Systems Conference |
| ICTL | Integrated Communication Test Laboratory |
| ICU | Integrated Communications Unit |
| ICU | Interim Control Unit |
| ICWG | Interface Control Working Group |
| ICubeIDCSP | Initial Defense Communication Satellite Program |
| ID | Identifier |
| ID | identification |
| IDA | International Dark-sky Association |
| IDA | integrated diode assembly |
| IDAGS | International Data & Graphics Standard |
| IDB | Increment Data Base |
| IDB | in-suit drink bag |
| IDD | Interface Definition Document |
| IDDT | Integrated Display & Development Team |
| IDE | Integrated Development Environment |
| IDE | Integrated Drive Electronics |
| IDEA | Ionization Density & Electric field Analyzer |
| IDECS | International Dark Energy Cosmology Survey |
| IDIQ | Indefinite Date/Indefinite Quantity |
| IDIQ | Indefinite Delivery Indefinite Quantity |
| IDL | Interactive Data Language |
| IDLE | idle control word |
| IDM | ISS Departure Maneuver |
| IDM | maneuver,ISS Departure Maneuver |
| IDM | information documentation management |
| IDMP | input data for mask or programming file generation |
| IDNX | Integrated Digital Network Exchange |
| IDP | Interface Development Panel |
| IDPS | Interface Data Processing Segment |
| IDR | Incremental Design Review |
| IDRD | Increment Definition & Requirements Document |
| IDRP | increment definitions requirements plan |
| IDS | Integrated Documentation Service |
| IDSS | International Docking System Standard |
| IE | Ionospheric Explorer (Injun Explorer) |
| IE | Innovations in Education (NASA, Education) |
| IEA | integrated equipment assembly |
| IEC | International Electrotechnical Commission |
| IEEE | Institute of Electrical & Electronics Engineers |
| IEEE | Institute of Electrical and Electronics Engineers |
| IEHA | Integrated Experiment Hazard Assessment |
| IEMP | Integrated Enterprise Management Program |
| IEPT | International Execution Planning Team |
| IERS | international earth rotation service |
| IERS | international Earth rotation & reference service |
| IES | Institute of Environmental Sciences |
| IEST | Institute of Environmental Sciences & Technology |
| IETF | internet engineering task force |
| IF | intermediate frequency |
| IFC | In-Flight called |
| IFDS | Integrated Frequency Deconfliction System |
| IFEP | In-flight examination program (MEC program) |
| IFHX | Interface Heat Exchanger |
| IFI | Item For Investigation |
| IFI | Items For Investigation |
| IFL | Integrated Flight Load |
| IFL | Inter-Facility Link |
| IFL | interpretation function language |
| IFM | In Flight Maintenance |
| IFM | in-flight maintenance |
| IFMP | Integrated Financial Management Program |
| IFMS | Interagency Fleet Management System |
| IFO | Intensive Field Observation |
| IFOC | International Flight Operations Contract |
| IFOR | Interagency Forum Operational Requirements |
| IFOV | Instantaneous Field of View |
| IFS | Integrated Flight Schedule |
| IFT | Initial Flight Test |
| IFTCA | Internal Fluid & Temperature Control Assembly |
| IFWN | In-Field Wireless Network |
| IG | Inspector General |
| IGA | Inter Government Agreement |
| IGARSS | International Geoscience and Remote Sensing Symposium |
| IGBT | insulated gate bipolar transistor |
| IGDG | Internet-based Differential GPS System |
| IGEB | Interagency GPS Executive Board |
| IGM | InterGalactic Medium |
| IGOsat | Ionospheric & Gamma-ray Observations Satellite |
| IGRF | international geomagnetic reference field |
| IGS | Interconnecting Ground System |
| IGS | Integrated Ground Segment |
| IGS | Intelligence Gathering Satellite |
| IGS | Integrated Ground Subnetwork |
| IGS | International Ground Stations |
| IGS | International GNSS Service |
| IGS | Interconnection Ground Subnetwork |
| IGS RN | Interconnect Ground Subnetwork Relays & Nodes |
| IGS RN | Interconnect Ground System Relays & Nodes |
| IGS WAN | Interconnect Ground System Wide Area Network |
| IGS WAN | Interconnect Ground Subnetwork Wide Area Network |
| IGS-NCC | IGS-Network Control Centre |
| IGS-WAN | IGS-Wide Area Network |
| IGSS | Integrated Ground System Specification |
| IGY | International Geophysical Year |
| IHX | Interloop Heat Exchanger |
| II | Increment Integration |
| IIC | Increment Integration Coordinator |
| IID | Interrupt identifier |
| IID | interface identification document |
| IIDP | increment implementation data pack |
| IIM | Increment Integration Manager |
| IIO | Increment Integration Office |
| IIP | Increment Implementation Plan |
| IIR | Increment Implementation Review |
| IIR | Increment Integration Review |
| IIR | Imaging Infrared Radiometer |
| IIRC | If I Recall Correctly |
| IIST | Initial Integrated Systems Test |
| IIT | Increment Integration Team |
| IKAROS | Interplanetary Kite-craft Accelerated by Radiation Of the Sun |
| IKI | Russian Space Research Institute |
| IL | Integration Lead |
| IL | Inboard Lower |
| ILA | Internal Lighting Assembly |
| ILFD | Increment Lead Flight Director |
| ILLUMA-T | Integrated LCRD Low-Earth Orbit User Modem and Amplifier Terminal |
| ILN | International Lunar Network |
| ILS | Integrated Logistics Support |
| ILS | integrated logistic support |
| IM | Issledovatel'ny Modul' |
| IM | Increment Manager |
| IM | intermediate moisture |
| IM | Intermodulation |
| IM-1 | Instrumentation Module (Unpressurised) |
| IM-2 | Instrumentation Module (Pressurised) |
| IMA | Integrated Modular Avionics |
| IMAGE | Imager for Magnetopause to Aurora Global Exploration |
| IMAGE | Imager for Magnetopause-To-Aurora Global Exploration |
| IMAP | Interstellar Mapping & Acceleration Probe |
| IMARS | ISS mission operations directorate avionics reconfiguration system |
| IMAX | maximum image |
| IMC | intermetallic compound |
| IMCA | integrated motor controller assembly |
| IMCCE | Institut de Mécanique Céleste et de Calcul des Ephémérides |
| IMDB | Instrument Mission Data Base |
| IMDC | Integrated Mission Design Center |
| IMEDS | Integrated Medical System |
| IMEWS | Integrated Missile Early Warning Satellite |
| IMEX | Inner Magnetosphere Explorer |
| IMF | interplanetary magnetic field |
| IMG | Integrated Medical Group |
| IMHO | In My Humble Opinion |
| IMHX | Inter-Module Heat eXchanger |
| IMI | Inner Magnetosphere Imager |
| IMIC | Integrated Management Information Center |
| IMK | Interim Medical Kit |
| IML1 | International Microgravity Laboratory 1 |
| IMMI | IVA man-machine interface |
| IMMT | International Space Station Mission Management Team |
| IMMT | ISS Mission Management Team |
| IMO | International Maritime Organization |
| IMO | International Meteor Organization |
| IMOS | Integrated Mission Operations Schedule |
| IMOT | International Medical Operation Team |
| IMP | Interplanetary Monitoring Platform |
| IMP | Integrated Master Plan |
| IMS | inventory management system |
| IMS | Infrastructure Monitoring System (Col-CC) |
| IMS | Integrated Medical System |
| IMS | Integrated Master Schedule |
| IMS | Information Management System |
| IMT | (NASA) Increment Management Team |
| IMU | Inertial Measurement Unit |
| IMULE | Inertial Measurement Unit (SpX Dragon) |
| IMV | Intermittent Mandatory Ventilation |
| IMV | Intermodule Ventilation |
| IMV | Intermodule Valve |
| INBD,Inbd | inboard |
| INCA | Ionospheric Neutron Content Analyzer |
| INCOSE | International Council on Systems Engineering |
| IND | Interplanetary Network Directorate |
| INDEX | Inovative Technology Demonstration Experiment |
| INFRA | GSOC Infrastructure |
| INFRA-GEN | Infrastructure General (Col-CC) |
| INFRA-SAN | Infrastructure Storage Area Network (ColCC) |
| INH | Inhibited |
| INH1 | IEC 61190-1-3 (2002) flux designation: inorganic, high activation (> 2 % halide) |
| INIT1 | initialisation control word 1 |
| INIT2 | initialisation control word 2 |
| INIT3 | initialisation control word 3 |
| INKSNA | Iran-North Korea-Syria Non-proliferation Act |
| INOC | Integrated Network Operation Center |
| INPE | Brazilian Institute for Space Research |
| INPE | Instituto Nacional de Pesquisas Espaciais (National Institute for Space Research, Brazil) |
| INPE | National Institute for Space Research—Brazil (Instituto Nacional de Pesquisas Espaciais) |
| INPS | Integrated Network Planning System |
| INS | inspection |
| INS | Inertial Navigation System |
| INSPIRE | Interplanetary NanoSpacecraft Pathfinder In a Relevant Environment |
| INST | Installation |
| INT MDM | Internal Multiplexer/Demultiplexer |
| INT-1 | SW Integration Facility |
| INT-2 | SW Integration Facility |
| INTA | Instituto Nacional de Técnica Aeroespacial (National Institute for Aerospace Technology, Spain) |
| INTA | Instituto Nacional de Técnica Aerospacial |
| INTEGRAL | International Gamma Ray Astrophysics Laboratory |
| INTEGRAL | INTErnational Gamma-Ray Astrophysics Laboratory |
| INTRSA | international registration scheme for assessors |
| INTSYS | Internal Systems |
| INTSYS | (ISS) Internal Systems |
| INVADER | Interactive satellite for Art & Design Experimental Research |
| IO | Italian Oscar |
| IOA | Integrated Operations Architecture |
| IOAG | Interagency Operations Advisory Group |
| IOC | Initial Operating Capability |
| IOCPS | Integrated Optical Communications & Proximity Sensors |
| IOCU | input/output controller unit |
| IOI | In-Orbit Infrastructure |
| IOMP | Increment Operations & Maintenance Plan |
| ION | Illinois Observing Nanosatellite |
| ION | Institute of Navigation |
| IONet | Internet Protocol (IP) Operational Network |
| IOOR | in-orbit operations review |
| IOP | Interoperability Plenary |
| IOP | Intensive Observation Period |
| IOP | Ignition Over Pressure |
| IOP | integrated operations plan |
| IOP | Intraocular Pressure |
| IOPM | IOT Execute Level Planning sub-service Manager |
| IOR | Increment Operations Review |
| IOR | ISS Operational Readiness |
| IOS | Integrated Operations Scenarios |
| IOSS | Inflatable Optical Sphere System |
| IOT | Industrial Operations Team |
| IOT-ARS | IOT Anomaly Reporting System |
| IOT-TS | IOT Ticket System |
| IOTA | Infrared-Optical Telescope Array |
| IOTA | International Occultation Timing Association |
| IOTMM | Integrated Overall Thermal Mathematical Model |
| IP | International Partner |
| IP | Internet Protocol |
| IP | International Partners |
| IP (Phone) | Internet Protocol (Phone) |
| IPA | isopropyl alcohol (isopropanol) |
| IPA | isopropyl alcohol |
| IPA | isopropanol |
| IPAC | Infrared Processing & Analysis Center |
| IPACS | integrated power & attitude control systems |
| IPAO | Independent Program Assessment Office |
| IPAT | International Partners Attribute Table |
| IPC | association connecting electronic industries |
| IPCB | IP-Concatenation Box |
| IPCC | International Panel on Climate Change |
| IPCE | Independent Program Cost and Evaluation |
| IPCS | Inter-process Communications System |
| IPD | Information Processing Division |
| IPEX | Intelligent Payload Experiment |
| IPF | Image Processing Facility |
| IPLAT | International Partner Label Assessment Team |
| IPM | Increment Payload Manager |
| IPMS | Integrated Procurement Management System |
| IPN | Interplanetary Network |
| IPNOC | Internet Protocol Network Operations Center |
| IPO | Integrated Program Office |
| IPO | Institutional Program Office |
| IPOL | like in ESA-ADMIN-IPOL(2008)6-rev1 |
| IPOP | ISS Prjgram Off-Nominal Situation Plan |
| IPP | Innovative Partnership Program |
| IPP | Innovative Partnerships Program |
| IPS | Internet Protocol Service |
| IPS | integrated planning system |
| IPS | Internet Protocol Suite |
| IPS | Internet Protocol Services |
| IPS | Inertial Pointing System |
| IPSP | Increment Preparation Support Plan |
| IPT | Integrated Product Team |
| IPV | International Procedure Viewer |
| IPWG | Interagency Partnerships Working Group |
| IPWG | Integrated Planning Working Group |
| IPX | Novell Internetwork Packet Exchange |
| IQSY | International Quiet Sun Year |
| IR | InfraRed |
| IRAC | Integrated Resilient Aircraft Controls |
| IRAC | Inter-department Radio Advisory Committee |
| IRAD | Independent Research and Development |
| IRAF | Image Reduction & Analysis Facility |
| IRAS | InfraRed Astronomical Satellite |
| IRB | Institutional Review Board (American) |
| IRCB | Infra-Red Calibration Balloon |
| IRD | Increment Requirements Document |
| IRD | Interface Requirements Document |
| IRDT | Inflatable Re-Entry & Descent Technology |
| IRF | inertial reference frame |
| IRFNA | Inhibited Red Fuming Nitric Acid |
| IRIG | Inter-Range Instrumentation Group |
| IRIS | Infra-Red Imaging Surveyor |
| IRIS | Interface Region Imaging Spectrograph |
| IRM | Ion Release Module |
| IRM | Information Resources Management |
| IRMS | Information Resources Management Service |
| IRN | Interface Revision Notice |
| IRPP | integrated rectangular parallelepiped |
| IRPT | inspection report |
| IRR | Investigation Readiness Reviews |
| IRRP | Institutional Realignment and Recovery Project |
| IRS | Indian Remote Sensing Satellite |
| IRSA | NASA/IPAC Infrared Science Archive |
| IRSIS | International Rendezvous System Interoperability Standard |
| IRSOV | Intermodule ventilation Return line Shut Off Valve |
| IRSP | Instrumentation Radar Support Program |
| IRT | Independent Review Team |
| IRT | Integrated Rendezvous Target |
| IRTF | Internet Research Task Force |
| IRTS | Integrated Radiation Transport Suite |
| IS | Implementing Strategy |
| IS | Istrebitel Sputnikov |
| ISA | Interconnection Security Agreement |
| ISA | Institutional Service Agreement |
| ISA | Inter Stage Adapter |
| ISARA | Integrated Solar Array & Reflectarray Antenna |
| ISAS | Institute of Space and Aeronautical Science (Japan) |
| ISAS | Institute of Space & Astronautical Science (Japan) |
| ISAT | Innovative Spacebased radar Antenna Technology |
| ISCCP | International Satellite Cloud Climatology Project |
| ISD | input serial digital |
| ISDC | International Space Development Conference |
| ISDN | Integrated Switched Digital Network |
| ISDN | Integrated Services Digital Network |
| ISDN | Integrated Service Digital Network |
| ISE | Integrated Station Executive |
| ISECG | International Space Exploration Coordination Group |
| ISEE | International Sun Earth Explorer |
| ISES | Integrated Space Experiment System |
| ISFA | Intermodule ventilation Supply Fan Assembly |
| ISIL | ISS Systems Integration Lab |
| ISIM | Integrated Science Instrument Module |
| ISIS | international subrack interface standard |
| ISM | Industrial, Scientific, and Medical |
| ISM | InterStellar Medium |
| ISO | International Standards Organization |
| ISO | International Organization for Standardization |
| ISO | Infrared Space Observatory |
| ISO | Inventory Stowage Officer |
| ISO | International Standards Organisation |
| ISOCAM | ISO infrared Camera |
| ISOV | valve,isolation valve |
| ISP | In-Space Propulsion |
| ISP | Internet Service Provider |
| ISP | Inertial Sun-Point |
| ISPM | International Solar Polar Mission (now Ulysses) |
| ISPP | In-Situ Propellant Production |
| ISPR | International Standard Payload Rack |
| ISPR | international standard payload rack: |
| ISPX | Information Sharing Protocol for External |
| ISR | Interim Standard Review |
| ISRO | Indian Space Research Organization |
| ISRO | Indian Space Research Organisation |
| ISRP | Integrated Systems Research Program |
| ISRU | In-Situ Resource Utilization |
| ISS | International Space Station |
| ISS | EP International Space Station Exploitation Program |
| ISS | Ionosphere Sounding Satellite |
| ISS FD | ISS Flight Director |
| ISS MORD | Medical Operations Requirements Document |
| ISS SPAN | ISS Spacecraft Analysis Manager |
| ISS-RD | International Space Station - Russian Segment |
| ISS-RS | International Space Station - Russian Segment |
| ISS-USOS | International Space Station-United States On-Orbit Segment |
| ISSA | International Space Station Alpha |
| ISSA | International Space Station assembly |
| ISSMP | International Space Station Medical Project |
| ISSOV | Intermodule ventilation Supply line Shut Off Valve |
| ISSP | International Space Station Program |
| IST | Increment Support Timeline |
| IST | interconnect stress test |
| IST | Integrated Support Team |
| ISTP | Integrated Space Transportation Plan |
| ISTP | International Solar Terrestrial Physics program (includes the satellites wind, Geotail, Polar, SoHO & Cluster projects) |
| ISTP | International Solar Terrestrial Physics |
| ISV | independent software validation |
| ISVV | independent software verification & validation |
| ISY | International Space Year |
| IT | Information Technology |
| ITA | Internal Task Agreement |
| ITA | integrated truss assembly |
| ITAC | International Telecommunication Advisory Committee |
| ITAR | International Traffic in Arms Regulation |
| ITAR | International Traffic in Arms Regulations |
| ITC | Instructional Training Techniques Course |
| ITC | Instructor Training Course |
| ITCB | International Training Control Board |
| ITCOP | Interagency Tracking and Communications Operations Panel |
| ITCR | Increment Training Certification Report |
| ITCS | Internal Temperature Control System |
| ITCS | internal thermal control system |
| ITEE | Integration & Test Electrical Engineering |
| ITEPC | Inter Mars TEPC |
| ITI | Innovation Triangle Initiative |
| ITIL | Information Technology Infrastructure Library |
| ITIP | Increment Training Implementation Plan |
| ITIWG | Increment Training Implementation Working Group |
| ITL | Increment Training Lead |
| ITO | indium tin oxide |
| ITOO | Integrated Tactical Operations Organization |
| ITOS | Improved Tiros Operational Satellite |
| ITOS | Integrated Test and Operations System |
| ITRD | Increment Training Requirements Document |
| ITRF | international terrestrial reference frame |
| ITRS | international terrestrial reference system |
| ITS | integrated truss structure |
| ITS | Information Technology Security |
| ITS-P | Integrated Truss Structure - Port |
| ITS-S | Integrated Truss Structure - Starboard |
| ITS-Z | Integrated Truss Structure - Zenith |
| ITT | invitation to tender |
| ITTM | ISS Telemetry to Moscow |
| ITU | International Telecommunication Union |
| ITU | Input Terminal Unit |
| ITU-R | ITU - Radiocommunication |
| ITU-R | radio communication sector of the ITU |
| ITU-R | International Telecommunication Union – Radiocommunications Sector |
| ITU-RR | ITU - Radio Regulations |
| ITU/RR | ITU radio regulations |
| ITV | Instrumented Target Vehicle |
| IU | Inboard Upper |
| IU | Instrument Unit |
| IUE | International Ultraviolet Explorer |
| IUGG | International Union of Geodesy & Geophysics |
| IUPAC | International Union of Pure & Applied Chemistry |
| IURC | Interim User Requirement Collection |
| IUS | Inertial Upper Stage |
| IUVS | Imaging UltraViolet Spectrometer |
| IV | intravehicular |
| IV | intravenous |
| IV&V | Independent Verification and Validation |
| IV&V | Independent Verification & Validation |
| IV-CPDS | intravehicular-charged particle directional spectrometer |
| IVA | Intra Vehicular Activity |
| IVG | inverted voltage gradient |
| IVGD | inverted voltage gradient discharge |
| IVR | Increment Verification Review |
| IVRHB | Intravehicular Robotics Home Base |
| IVSU | internal video switch unit |
| IVT | Interface Verification Test |
| IVV team | "Independent Verification and Validation test team" |
| IWC | International Wireless Communications |
| IWG | Investigators Working Group |
| IWG | Informal Working Group |
| IXO | International X-ray Observatory |
| IXPE | Imaging X-Ray Polarimetry Explorer |
| IXV | Intermediate eXperimental Vehicle |
| I_MDB | Integrated Mission Data Base (GUI) |
| IceBridge | NASA Science Airborne mission |
| Iinusat-1 | Indonesian inter-university satellite |
| In | inlet |
| InP | indium posphide |
| InSPACE | Investigating the Structure of Paramagnetic Aggregates from Colloidal Emulsions |
| Inact | inactive |
| Incl. | including |
| Inh | inhibit |
| Init | initialize |
| Init | initiate |
| Init | initial |
| Inop | inoperative |
| Inst | instrument |
| Inst | instrumentation |
| Int | interior |
| Int | international |
| Intasat | Instituto Nacional de Tecnica Aerospacial Satélite |
| Intelsat | International Telecommunication Satellite |
| Inv | inverter |
| Iout | output current |
| Iris | International Radiation Investigation Satellite |
| Isc | short-circuit current |
| Isis | International Satellite for Ionosphere Studies |
| Isol | isolation |
| Isol | isolate |
| Isp | specific impulse |
| Iss. | Issue |
| Itamsat | Italian Amateur Satellite |
| J-2X | Upper Stage Engine (Pratt & Whitney Rocketdyne, Inc) |
| J-CCB | Joint Contract Change Control Board |
| J-ECB | Joint Engineering Control Board |
| J-MMT | (ESA) Joint Mission Management Team |
| J-R | curve resistance curve based on J-integral |
| J2000.0 | epoch 2000 January 1.5 (TT) |
| JADE | Jovian Auroral Distributions Experiment |
| JAESat | Joint Australian Engineering Satellite |
| JAM | Joint Airlock Module |
| JAP | JOIP Approval Panel |
| JAS | Japanese Amateur Satellite |
| JAWSAT | Joint Air Force Academy / Weber State University Satellite |
| JAXA | Japan Aerospace Exploration Agency |
| JB-2006 | Jacchia-Bowman semi-empirical model (2006) |
| JB-2008 | Jacchia-Bowman semi-empirical model (2008) |
| JCCT | Joint Cargo Certification Team |
| JCL | Joint Confidence Level (cost & schedule) |
| JCPC | Joint Crew Provisioning Catalog |
| JCS | Joint Control Software |
| JCSat | Japanese Communication Satellite |
| JD | justification document |
| JDEM | Joint Dark Energy Mission |
| JDI | Jonathan Dickinson |
| JDM | Joint Drive Module |
| JDMTA | Jonathan Dickinson Missile Test Annex |
| JEDEC | Joint Electron Device Engineering Council |
| JEDEC | joint electronic devices engineering council |
| JEDI | Jupiter Energetic particle Detector Instrument |
| JEDI | Joint Execute Package Development & Integration |
| JEF | JEM Exposed Facility (see also EF) |
| JEM | Japanese Experiment Module (for SSF) |
| JEM | RMS JEM remote manipulator system |
| JEM | Japanese experiment module |
| JEM-EF | Japan Experiment Module - Exposed Facility |
| JEM-ELM-ES | Japan Experiment Module - Experimental Logistics Module Exposed Section |
| JEM-ELM-PS | Japan Experiment Module - Experimental Logistics Module Pressurised Section |
| JEM-PM | Japan Experiment Module - Pressurised Module |
| JERS | Japanese Earth Resources Satellite |
| JES | Joint excursion sensor |
| JEU | joint electronics unit |
| JEUS | Joint Emergency Undocking & Separation |
| JFET | junction field effect transistor |
| JFH | Jet Firing History |
| JFH | history,Jet Firing History |
| JFRCB | Joint Flight Rule Control Board |
| JGR | Journal of Geophysical Research |
| JHU | Johns Hopkins University |
| JHU | John Hopkins University |
| JHU-APL | Johns Hopkins University–Applied Physics Laboratory |
| JICB | Joint Integrated Control Board |
| JICB | Joint Integration Control Board |
| JICR | Joint Institutional Communications Requirements |
| JILA | Joint Institute for Laboratory Astrophysics |
| JIMO | Jupiter Icy Moons Orbiter |
| JIN | JSC Information Network |
| JIP | Joint Integration Plan |
| JIP | Joint Implementation Plan |
| JIS | Joint Integrated Simulation |
| JISRR | Joint Integrated Simulation Readiness Review |
| JITT | Just-in-Time Training |
| JIVTP | Joint Integration, Verification & Test Plan |
| JK | Johannes Kepler |
| JLE | JEM Experiment Logistic Module - Exposed Section |
| JLP | JEM Experiment Logistics Module - Pressurized Section |
| JLP | Japanese Logistics Pressurized |
| JM | Jettison Motor |
| JMAPS | Joint Milli-Arcsecond Pathfinder Survey |
| JMFP | Joint Mission Flight Plan |
| JMMT | Joint Mission Management Team |
| JMOI | Joint Mission Operations Integration Meetings |
| JMR | Jason-1 Mission Radiometer |
| JMST | Joint Multi Segment Training |
| JMST | Joint Multi-Segment Training |
| JMSTP | Joint Mission Short-Term Plan |
| JOIP | Joint Operational Interface Procedure |
| JOP | Joint Operations Panel |
| JOP | joint operations plan |
| JORR | Joint Operation Readiness Review |
| JOWG | Joint Operations Working Group |
| JPD | JSC Policy Directive |
| JPDO | Joint Planning & Development Office |
| JPEG | joint photographic experts group |
| JPF | Jenkins Pre-Doctoral Fellowship |
| JPL | Jet Propulsion Laboratory |
| JPM | JEM Pressurized Module |
| JPSS | Joint Polar Satellite System |
| JRD | Joint Requirement Document |
| JRPA | Joint Robotic Precursor Activities |
| JSAC | Joint Strategic Assessment Committee |
| JSC | Johnson Space Center |
| JSC | Johnson Space Center (NASA) |
| JSC | NASA Lyndon B. Johnson Space Center |
| JSC | Johnson Space Center (Houston, Tx.) |
| JSL | Joint Station LAN |
| JSON | JavaScript Object Notation |
| JSRR | Joint Simulation Readiness Review |
| JSSW | Ji Shu Shiyan Weixing |
| JTAG | joint test action group |
| JTCB | Joint Training Control Board |
| JTG | Joint Task Group |
| JTR | Joint Test Plan |
| JTRS | Joint Tactical Radio System |
| JTVE | JEM TV Camera Electronics |
| JUP | Joint Utilisation Plan |
| JV | Jules Verne |
| JVC | Joint Venture Company |
| JWG | Joint Working Group |
| JWS | Joint Warfighting Space |
| JWST | James Webb Space Telescope |
| JWST | James Webb Space Telescope (formerly: the NGST,Next Generation Space Telescope) |
| Juno | Jupiter Near-polar Orbiter |
| K-R | curve resistance curve based on stress intensity factor (K) |
| KABA | ESA corporate Access Control System |
| KAISTSat | Korea Advanced Institute of Science & Technology Satellite |
| KAM | Knowledge Acquired by Middle Schools |
| KAO | Kuiper Airborne Observatory |
| KARI | Korea Aerospace Research Institute |
| KASI | Korean Astronomy and Space Science Institute |
| KASI-SAT | Korea Astronomy & Space Science Institute Satellite |
| KAUSAT | Korea Aerospace University Satellite |
| KB; Kybd | keyboard |
| KBAR | Knee-bar |
| KBT | Ka-Band Transceiver |
| KC | fracture toughness for stress conditions other than plane strain |
| KCAL Kc | kilocalorie |
| KCRT | Keyboard Cathode Ray Tube |
| KDD | Knowledge Discovery and Data |
| KDP | Key Decision Point |
| KDP | Key Decision Point (review) |
| KE | kinetic energy |
| KEAS | Knots Equivalent Air Speed |
| KET | Ketones |
| KF | Kua Fu |
| KFKI | Research Institute for Particle and Nuclear Physics (Hungary) |
| KFRL | Kennedy Forward Return Link |
| KG/CM2 | Kilograms Per Square Centimeter |
| KGF/CM2 | Kilograms Force Per Square Centimeter |
| KH | Key Hole |
| KHUSAT | Kyung Hee University Satellite |
| KI | Keck Interferometer |
| KIC | plane strain fracture toughness |
| KICS | KSC Integrated Communications Services |
| KIP | key inspection point |
| KISCC | threshold stress-intensity factor for stress-corrosion cracking |
| KIc | fracture toughness |
| KIscc | stress-corrosion cracking threshold stress intensity factor |
| KKS | Kouku Kousen Satellite |
| KLOC | Thousands (Kilo) of Lines of Code |
| KNACKSAT | KKMUTNB Academic Challenge of Knowledge Satellite |
| KO | Korean Oscar |
| KOM | Kick-Off Meeting |
| KOMPSAT | Korea Multi-Purpose Satellite |
| KOMPSAT | Korean Multipurpose Satellite |
| KOS | Keep Out Sphere |
| KOZ | keep out zone,cargo (item) keep out zone |
| KPI | Key Performance Indicator |
| KPNO | Kitt Peak National Observatory |
| KPad | Kilopascals Differential |
| KQ | qualification test factor |
| KR | Kent Ridge |
| KSA | Keck Single Aperture |
| KSA | K-Band Single Access |
| KSAT | Kongsberg Satellite Services |
| KSC | Kennedy Space Center |
| KSC | Kennedy Space Center (NASA) |
| KSC | NASA John F. Kennedy Space Center |
| KTB | Cretaceous-Tertiary Boundary (from German) |
| KTS | Kennedy Tracking Station |
| KUS | Kennedy Uplink Station |
| KUTESat | Kansas Universities' Technology Evaluation Satellite |
| KYA | Keel Yoke Assembly (ICC part) |
| Ka | K-Above frequency band |
| Ka-IPS | Ka-Band IPS |
| KhSC | Khrunichev Space Center |
| KhSC | Khrunichev State Research & Production Space Center |
| Kic | plane strain critical stress intensity factor |
| Kiscc | plane strain critical stress intensity factor for a specific environment |
| Kitsat | Korea Institute of Technology Satellite |
| Ku | K-Under frequency band |
| Ku-IPS | Ku-Band IPS |
| Ku-band | Ku-band subsystem |
| KuIPS | Ku-Band Internet Protocol Service |
| KuRS | Ku radar system |
| KuSA | Ku-Band Single Access |
| L | Lagrange (as in Lagrange points L1 through L5) |
| L | launch |
| L | Luna |
| L | left |
| L&EO | Launch and Early Orbit |
| L&M | IPT Logistics & Maintenance Integrated Product Team |
| L&M | logistics and maintenance; logistics (supplies) |
| L+6 | Launch plus 6 |
| L-12 | Launch minus 12 |
| L-CC | Lanzarote-Control Center |
| L-Char | link-character |
| L/V | launch vehicle |
| L0P | Level-zero-processor |
| L1 | LaGrange Point 1 |
| L2 | LaGrange Point 2 |
| L2 | Second Sun-Earth Libration, or Lagrange Point |
| L3 | L-3 Communications Corporation |
| LACB | Landing Aids Control Building |
| LACE | Low-Power Atmospheric Compensation Experiment |
| LACIS | Logiciel Adapte a la Comuunication des Informations Systemes. (Project specific format) |
| LADEE | Lunar Atmosphere & Dust Environment Explorer |
| LADEE | Lunar Atmosphere and Dust Environment Explorer |
| LAGEOS | Laser Geodynamics Satellite |
| LAIMP | Lunar Anchored Interplanetary Monitoring Platform |
| LAM | Laser Altimetry Mission |
| LAM | Liquid Apogee Motor |
| LAN | Local Area Network |
| LANCE | Land Atmosphere Near real-time Capability for EOS |
| LANE | lane field |
| LANL | Los Alamos National Laboratory |
| LAPAP | LAPtop APplication Software |
| LARES | Laser Relativity Satellite |
| LAS | Launch Abort System |
| LASCO | Large Angle & Spectrometic Coronagraph |
| LASER | Light Amplification by Stimulated Emission of Radiation |
| LASER | Lunar Advanced Science & Exploration Research |
| LASP | Laboratory for Atmospheric & Space Physics (University of Colorado, Boulder) |
| LAT | lot acceptance test |
| LAT | Lunar Architecture Team |
| LATA | Local Access Transport Area |
| LBB | Leak-Before-Burst (design) |
| LBB | leak before burst |
| LBB | leak-before-burst |
| LBNP | Lower body negative pressure |
| LBT | Large Binocular Telescope |
| LBTI | Large Binocular Telescope Interferometer |
| LBTM | Layer Bispectral Threshold Method |
| LBV | Low Bandwidth Video |
| LBW | laser beam welding |
| LC | Launch Complex |
| LCA | Lab cradle assembly |
| LCA | loop crossover assembly |
| LCAS | Low-Cost Access to Space |
| LCC | Life Cycle Cost |
| LCC | Launch Commit Criteria |
| LCC | Launch Control Center/Complex |
| LCC | Launch Control Center (KSC) |
| LCCC | leadless ceramic chip carrier |
| LCCE | Life Cycle Cost Estimate |
| LCDA | launcher coupled dynamic analysis |
| LCDA | launch vehicle coupled dynamic analysis |
| LCDM | Landsat Data Continuity Mission |
| LCG | Liquid-Cooled Garment |
| LCG | Liquid Cooling Garment |
| LCL | latching current limiter |
| LCNS | Lunar Communication and Navigation Systems |
| LCR | Launch Control Room |
| LCRD | Laser Communications Relay Demonstration |
| LCROSS | Lunar Crater Observation & Sensing Satellite |
| LCS | Lincoln Calibration Sphere |
| LCS | LEE Control Software |
| LCT | Lunar Communications Terminal |
| LCT2 | Low Cost TDRSS Transceiver |
| LCXT | Low Cost X-Ray Telescope |
| LD | logistic delay |
| LDA | launch deploy assembly |
| LDAP | Lightweight Directory Access Protocol |
| LDAR | Lightning Detection and Ranging |
| LDCM | Landsat Data Continuity Mission |
| LDCR | long-duration crew restraint |
| LDE | Landing & Descent Element |
| LDEF | Long Duration Exposure Facility |
| LDEX | Lunar Dust EXperiment |
| LDFR | long-duration foot restraint |
| LDM | Limited Distance Modems |
| LDM | logistics double module |
| LDPC | Low Density Parity Check |
| LDPE | low density polyethylene |
| LDR | low data rate |
| LDR S-Band | Low Data Rate S-Band |
| LDREX | Large-scale Deployable Reflector Experiment Model |
| LDSD | Low Density Supersonic Decelerators |
| LDT | Long Duration Test |
| LDU | linear drive unit |
| LDU | Linear Drive Unit (MT) |
| LDUT | large data unit transfer |
| LEC | Local Exchange Carrier |
| LED | Light-emitting diode |
| LEDSAT | LED-based small Satellite |
| LEE | latching end effector |
| LEED | Leadership in Energy & Environment Design |
| LEF | load enhancement factor |
| LEFM | linear elastic fracture mechanics |
| LEISA | Linear Etalon Imaging Spectral Array |
| LEM | Lunar Excursion Module (a.k.a. LM) (Apollo spacecraft) |
| LEMNOS | Laser-Enhanced Mission Communication Navigation and Operational Services |
| LEMS | Lower extremity monitoring suit |
| LEO | Low Earth Orbit |
| LEO Data Svc | Low Earth Orbit Data Services |
| LEO-T | Low-Earth Orbiting Terminal |
| LEOP | launch & early orbit phase |
| LEOP | launch & early operations phase |
| LEOP | Launch and Early Orbit Phase |
| LEOPARDSat | Low Earth Orbit Platform for Aerospace Research & Development CubeSat |
| LES | Launch Escape System |
| LES | system,Launch Escape System |
| LES | Lincoln Experimental Satellite |
| LEST | Large Earth-based Solar Telescope |
| LET | linear energy transfer |
| LETF | Launch Equipment Test Facility |
| LEx | Lunar Data Exchange Tool |
| LF | low frequency |
| LFSA | List of Frequently Seen Acronyms (!) |
| LFSR | linear feedback shift register |
| LFT | Lufthansa Flight Training Center |
| LFW | linear friction welding |
| LGA | Low Gain Antenna |
| LGM | Little Green Men |
| LGS | Landsat-7 Ground Station |
| LH | Liquid Hydrogen (also LH2 or LHX) |
| LH | Launch Head |
| LH2 | Liquid Hydrogen |
| LHC | left hand circular |
| LHCP | Left Hand Circular Polarization |
| LHI | Light Heavy Ion Transport code |
| LHP | loop heat pipe |
| LI | List |
| LIC | laser induced contamination |
| LICIACube | Light Italian Cubesat for Imaging of Asteroids |
| LID | laser induced damage |
| LIDOS | Large Inclination Doppler Only Satellite |
| LIMS | Logistics Inventory Management System |
| LINK | Little Intelligent Nanosatellite of KAIST |
| LIPS | Living Plume Shield |
| LIRA | Lunar Interferometric Radio Array |
| LIS | Logistics Information System |
| LIS | Lead Increment Science |
| LISA | Laser Interferometer Space Antenna |
| LISN | line impedance stabilization network |
| LIT | listen-in test |
| LITE | Lidar In Space Technology Experiment |
| LITVC | Liquid Injection Thrust Vector Control |
| LK | Lunnyi Korabl |
| LL | Lincoln Laboratory |
| LL | Low Limit |
| LLC | Limited Liability Company |
| LLCD | Lunar Laser Communications Demonstration |
| LLCD | Lunar Laser Communication Demonstration |
| LLCW | Lane layer control word |
| LLGT | Lunar Lasercom Ground Terminal |
| LLIF | lower layer interface |
| LLIL | Limited Life Items List |
| LLITED | Low-Latitude Ionosphere/Thermosphere Enhancements in Density |
| LLNL | Lawrence-Livermore National Laboratory |
| LLNL | Lawrence Livermore National Laboratory |
| LLO | Low Lunar Orbit |
| LLOC | Lunar Lasercom Operations Center |
| LLOWG | Launch & Landing Operations Working Group |
| LLST | Lunar Lasercom Space Terminal |
| LLV | Lockheed Launch Vehicle |
| LM | Lockheed Martin |
| LM | Lunar Module (a.k.a. LEM) (Apollo spacecraft) |
| LM | Lunar Module |
| LMC | Large Magellanic Cloud |
| LMC | Link Monitor and Control |
| LMI | Local Management Interface |
| LMI | Lockheed Martin Intersputnik |
| LMP | Link Monitor Processor |
| LMPC | Linear Mode Photon-counting CubeSat |
| LMRSTSat | Low Mass Radio Science Transponder Satellite |
| LMS | Life and Microgravity Science |
| LMS | Lightweight MPESS Carrier |
| LMX | Les Mureaux |
| LMX-ESC | ATV Engineering Support Centre at Les Mureaux |
| LN2 | Liquid N2 (Nitrogen) |
| LNA | low noise amplifier |
| LNT | linear no-threshold |
| LO | Lunar Orbiter |
| LO | LUSAT Oscar |
| LO2 | Liquid Oxygen |
| LOAC | Loss of Attitude Control |
| LOADS | Low Altitude Density Satellite |
| LOC | Loss of Crew |
| LOC | Lines of Code |
| LOCOS | local oxidation of silicon |
| LOE | Level-of-Effort |
| LOF | Local Oscillator Frequency |
| LOF | Local Orbital Frame |
| LOFTI | Low Frequency Trans Ionospheric Satellite |
| LOFTID | Low Earth Orbit Flight Test of an Inflatable Decelerator |
| LOGACS | Low Gravity Accelerometer Calibration System |
| LOGOS | Lights Out Ground Operations System |
| LOI | Lunar Orbit Insertion |
| LOK | Lunnyi Orbitalnyi Korabl |
| LOM | Loss of Mission |
| LON | Launch on Need |
| LOOV | Liquid On-Off Valves |
| LOP | Lead Operations Planner |
| LOP | Local Operating Procedures |
| LOP-G | Lunar Orbital Platform Gateway |
| LOR | Lunar Orbit Relay |
| LOR | Line Outage Recorder |
| LORI | Large ORU Robotics Interface |
| LOS | Line of Sight |
| LOS | Loss Of Signal |
| LOST_SIGNAL | lost signal control word |
| LOX | Liquid OXygen |
| LP | Low Pass (filter) |
| LP | Lesson Plan |
| LP | Lunar Prospector |
| LPC | low power command |
| LPC-P | low power command, pulsed |
| LPC-S | low power command, static |
| LPGF | Low Profile Grapple Fixture |
| LPGS | Landsat Product Generation System |
| LPM | lumped parameter method |
| LPO | La Palma Observatory |
| LPRC | Logistics Platform/Rack/Container |
| LPS | liquid propulsion system |
| LPS | Landsat-7 Processing System |
| LPS | Launch Processing System |
| LPT | Low-Power Transceiver |
| LPU | Life Preserver Unit |
| LPV | Long Period Variable |
| LPW | Lunamuir Probe & Waves |
| LQ | limiting quality |
| LQP | Lunar Quest Program |
| LR | Lunar Rendezvous |
| LR | Lunar Relay |
| LRB | Liquid Rocket Booster |
| LRC | Langley Research Center |
| LRD | Launch Readiness Date |
| LRDL | low rate data link |
| LRE | Laser Ranging Equipment |
| LRITCS | Leak Recovery for ITCS |
| LRO | Lunar Reconnaissance Orbiter |
| LRP | Long Range Planner |
| LRP | Long-Range Planner |
| LRR | Launch Readiness Review |
| LRS | Lunar Relay Satellite |
| LRS | Laser Ranging Station |
| LRU | Line Replaceable Unit |
| LS | LAN Server |
| LSA | Logistic Support Application |
| LSAH | Lifetime Surveillance of Astronaut Health |
| LSAM | Lunar Surface Access Module |
| LSAR | Logistics Support Analysis Record |
| LSB | least-significant bit |
| LSB | least significant bit |
| LSB | less significant bit |
| LSDS | Life Sciences Data System |
| LSE | Laboratory Support Equipment |
| LSFEP | Life Sciences Flight Experiments Program |
| LSG | life sciences glove box |
| LSI | Large Space Integrator |
| LSIM | Local Simulation |
| LSM | Life Support Module |
| LSO | Landing Support Officer |
| LSOS | Limited Station Operations Support |
| LSP | Launch Services Program |
| LSR | Life Support Rack (ACLS) |
| LSR | Local Standard of Rest |
| LSRP | Life Science Research Protocol |
| LSRR | Logistic Support Readiness Review |
| LSS | life support system |
| LSSO | List of Safety Significant Operations |
| LST | Landing Support Test |
| LST | Logistics Support Team |
| LSYS | Lab Systems |
| LT | laptop |
| LTA | leg shell,lower torso assembly |
| LTA | Lunar Module Test Article |
| LTG; Ltg | lighting |
| LTI | linear time invariant |
| LTL | low-temperature loop |
| LTO | LTO NOx subsonic |
| LTP | Lunar Transient Phenomenon |
| LTRB | low-temperature reverse bias |
| LTU | load transfer unit |
| LU | latch up |
| LUTE | Lunar Ultraviolet Telescope Experiment |
| LV | Latch Valve,isolation latch valve (ATV propulsion system manifold isolation valves) |
| LV | vehicle,launch vehicle |
| LV | valve,latch valve,isolation latch valve (ATV propulsion system manifold isolation valves) |
| LV | Launch Vehicle |
| LV-HPC | low voltage high power command |
| LV; L/V | launch vehicle; booster |
| LVA | Launch Vehicle Adapter |
| LVC | Live, Virtual, Constructive |
| LVCMOS | low voltage complementary metal oxide semiconductor |
| LVD | low voltage directive |
| LVDC | Launch Vehicle Data Center |
| LVDS | low voltage differential signalling |
| LVDT | linear voltage displacement transducer |
| LVIS | Limited Voice Intercommunications System |
| LVLH | local-vertical–local-horizontal |
| LVPECL | low voltage positive emitter coupled logic |
| LVS | layout vs. schematic check |
| LVSA | Launch Vehicle Stage Adapter |
| LVT | lot validation testing |
| LVTTL | low voltage transistor – transistor logic |
| LVTTL | low voltage transistor-transistor logic |
| LWIR | long-wavelength infrared |
| LWS | Living with a Star |
| LWS | Lightweight Seat |
| LWTA | Light Weight Tool Stowage Assemblies (LWTSA) |
| LZP | Level Zero Processing |
| LZPF | Level Zero Processing Facility |
| LZPS | Level Zero Processing System |
| LZW | Lempel-Ziv-Welch |
| LaRC | Langley Research Center |
| LaRC | NASA Langley Research Center |
| LaRC | Langley Research Center (NASA) |
| LaTuR | Langmuir Turbulence Rocket |
| Lab | Laboratory |
| Lab | laboratory module |
| Lat | latch |
| LcPSO | Land cover Project Science Office |
| LeRC | Lewis Research Center (NASA now GRC) |
| LeRC | Lewis Research Center (see also: Glenn Research Center) |
| LeRC | Lewis Research Center |
| Len | length |
| Lgth,L | length |
| LiCl | Lithium Chloride (volume marker) |
| LiDAR | Light Detection & Ranging |
| LiOH | Lithium hydroxide |
| Lim | limit |
| LoB | Lines of Business |
| LoL | Limit of Liability |
| Loc | location |
| Losat-X | Low Altitude Satellite Experiment |
| M | Messier (as in M31, M13, M57, etc.) |
| M&C | Monitor & Control |
| M&O | Maintenance & Operations |
| M&O | Mission Operations |
| M&O | Maintenance and Operations |
| M&P | Materials & Processes |
| M&S | Modeling & Simulation |
| M-PSK | M-ary Phase Shift Keying |
| M/IIS | Mission / Increment Integration Service |
| M2A | Multimedia Asia |
| M2TE | MPCC Testing & Training Environment |
| M3 | Moon Mineralogy Mapper |
| MA | Milliamps |
| MA | Multiple Access |
| MA | main arm |
| MA | Mercury Atlas |
| MA | Main Arm (JEMRMS) |
| MA/ITP | Multilateral Advanced & Increment Training Plan |
| MABES | Magnetic Bearing Flywheel Experimental Satellite |
| MAC | modal assurance criterion |
| MACPEX | Mid-latitude Airborne Cirrus Properties Experiment |
| MACRO | Monopoles, Astrophysics, & Cosmic Ray Observatory |
| MACS | Mission and Computing Support |
| MACSAT | Multiple Access Communication Satellite |
| MACSAT | Medium-sized Aperture Camera Satellite |
| MAD | Madrid Ground Network call sign |
| MAF | Michoud Assembly Facility |
| MAF | Michoud Assembly Facility (NASA, managed by MSFC) |
| MAF | Multiple Access Forward |
| MAGIK | Manipulator Analisis Graphic Interactive Kinematics |
| MAGR | Miniaturized Airborne GPS Receiver |
| MAH | model of the high atmosphere |
| MAIA | Mission Analysis & Integrated Assessments |
| MAIT | manufacturing, assembly, integration & test |
| MAL | Master Alarm Light |
| MALTED | Mesospheric & lower Thermospheric Equatorial Dynamics |
| MAM | Manual Augmented Mode |
| MAMS | microgravity acceleration measurement system |
| MAO | Monoamine-oxidase |
| MAP | Microwave Anisotrophy Probe |
| MAPS | Master Analysis Plan & Schedule |
| MAPS | Measurement of Air Pollution from Satellites |
| MAPTIS | Materials & Processes Technical Information System |
| MAQSat | Maquette Satellite |
| MAR | mission analysis report |
| MAR | Mission Action Request (CHIT) |
| MAR | Middeck Accommodation Rack |
| MAR | Mission Analysis Room |
| MAR | Mission Assurance Requirement |
| MAR | Multiple Access Return |
| MARC | Maintainability Availability & Reliability Calculation (Tool) |
| MARD | Management Requirements Document |
| MARECS | Maritime European Communication Satellite |
| MARES | Muscle Atrophy Research & Exercise System |
| MARES | Muscle Atrophy Research Exercise |
| MARES | Muscle Atrophy Research and Exercise System |
| MARIO | Measurement of Actuator Response & Impedance on Orbit |
| MARS | Microgravity Advanced Research & Support Center |
| MARS | Microgravity Applications Recoverable Satellite |
| MARSIS | Mars Advanced Radar for Subsurface and Ionospheric Sounding |
| MART | Multilateral Anomaly Response Team |
| MAS | manual air supply |
| MAS | microbial air sampler |
| MAS | Maliy Avtonomiy Sputnik |
| MAS | Message Acquisition System |
| MASCB | Multilateral Avionics & Software Control Board |
| MAST | Multi-Application Survivable Tether |
| MASTER | meteoroid & space debris terrestrial environment reference model |
| MAT | Medical assessment test |
| MATE | Modular Automated Test Equipment |
| MATE | multiplexer/demultiplexer application test equipment |
| MATS | MMesospheric Airglow/Aerosol Tomography & Spectroscopy |
| MAV | Mars Assent Vehicle |
| MAVEN | Mars Atmosphere and Volatile EvolutioN |
| MAVEN | Mars Atmosphere & Volatile EvolutioN |
| MB | mission build |
| MB | Manned Base |
| MBD | Oultimission Bus Demonstration |
| MBF | mission build facility |
| MBK | Medications & Bandages Kit |
| MBOP | Multilateral BME Operations Panel |
| MBR | Microwave Background Radiation |
| MBRSC | Mohammed Bin Rashid Space Center (UAE) |
| MBRV | Maneuverable Ballistic Reentry Vehicle |
| MBS | Mobile servicer Base System (MSS) |
| MBS | mobile remote servicer base system |
| MBSAT | Mobile Broadcasting Satellite |
| MBSE | Model-Based System Engineering |
| MBSU | main bus switching unit |
| MBq | Mega Becquerel |
| MC | Magnetospheric Constellation |
| MCAS | MBS Common Attach System |
| MCAS | MBS common attachment system |
| MCB | Multilateral Control Board |
| MCB | Mission Control Board |
| MCC | Mission Control Center |
| MCC-H | Mission Control Center-Houston |
| MCC-H | Mission Control Center Houston |
| MCC-M | Mission Control Center-Moscow |
| MCC-M | Mission Control Centre Moscow |
| MCC-M | Mission Control Center – Moscow |
| MCC-X | Mission Control Center SpaceX (in Hawthorne) |
| MCCB | Mission Coordination Control Board |
| MCCS | Misson Control Centre Software |
| MCD | Maximum-likelihood Convolutional Decoder |
| MCD | Minimum Cost Design |
| MCEIE | Mission Critical External Interface Environment |
| MCF | modal confidence factor |
| MCFTM | multiplier,microconical fitting torque m. |
| MCG | Mojave Coordinating Group |
| MCG | Motion Control Group |
| MCGA | multichip column grid array |
| MCHL | master component heat load |
| MCI | mass, CoM & inertia |
| MCI | mass, centre of mass, inertia |
| MCNP | Monte Carlo N-Particle Transport Code |
| MCNPX | Monte Carlo N-Particle Extended Transport Code |
| MCO | Mars Climate Orbiter |
| MCOP | Multilateral Crew Operations Panel |
| MCOR | Medium-Rate Communications Outage Recorder |
| MCP | microchannel plate |
| MCR | Mission Concept Review |
| MCS | Mission Control System |
| MCS | Monitoring & Control Subsystem |
| MCS | Monitoring Control System |
| MCS | Motion Control System |
| MCS | Monitoring & Control System |
| MCS | Mission Control Software |
| MCT | mercury cadmium telluride |
| MCT | mercury cadmium telluride IR detector |
| MCU | MBS computer unit |
| MCV | Medical College of Virginia |
| MD | Mission Directorate |
| MDA | Metric Data Assembly |
| MDA | Mission Database Application |
| MDB | Mission Data Base |
| MDBD | MDB Data |
| MDC | Maintenance Data Collection |
| MDD | mechanism design description |
| MDD | mission description document |
| MDD | mission definition document |
| MDE | Model Development Environment (obsolete) |
| MDEALS | Multilateral Data Exchange Agreement List & Schedule |
| MDF | Manipulator Development Facility |
| MDG | Medical Disposition Group |
| MDL | Microgravity Development Laboratory |
| MDL | middeck locker |
| MDL | Mission Data Load (CST-100) |
| MDM | Multiplexer/De-Multiplexer (or Mission Data Manager) |
| MDM | multiplexer demultiplexer |
| MDM | Multiplexer/Demultiplexer |
| MDM | Modulator/Demodulator |
| MDM | multiplexer-demultiplexer |
| MDOF | multiple degree of freedom |
| MDP | maximum design pressure |
| MDPS | Micrometeoroids & Debris Protection System |
| MDPS | Meteoroids & Debris Protective Shield |
| MDR | Mission Definition Review |
| MDR | Medium Data Rate |
| MDRF | Mission Data Request Form |
| MDRS | Mars Dessert Research Station |
| MDS | Mission Demonstration Satellite |
| MDSA | Multi-sensor Data Synergy Advisor |
| MDSC | Mission Data Storage Consolidation |
| MDSCC | Madrid Deep Space Communications Complex |
| MDT | MSX Dedicated Target |
| ME | Memory Effect |
| MEA | Moon exclusion angle |
| MEASAT | Malaysia East Asia Satellite |
| MEC | medical equipment computer |
| MECO | Main Engine CutOff |
| MED | Manual Entry Device |
| MEDEVAC | Medical Evacuation |
| MEDLI | Mars Science Laboratory Entry, Descent, & Landing Instrument |
| MEDOP | Medical Extended Duration Orbiter Pack |
| MEF | Monitoring Enabling Flag |
| MEI | Mission Essential Infrastructure |
| MEIT | Multi-Element Integration Test |
| MEJI | Mars Exploration Joint Initiative |
| MEK | methyl ethyl ketone |
| MEK | methyl ethyl keton |
| MEL | Master Equipment List |
| MEL | Mass Estimate at Launch |
| MELF | metal electrode face bonded |
| MELFI | minus eighty degree laboratory freezer for ISS |
| MEMS | micro-electromechanical structure |
| MEMS | micro-electromechanical system(s) |
| MEO | medium Earth orbit |
| MEOP | maximum expected operating pressure |
| MEP | Multi Element Procedure |
| MEP | Mars Exploration Program |
| MEP | Management Education Program |
| MEPS | Microencapsulation Electrostatic Processing System |
| MEPSI | MEMS-based PICOSAT Inspector |
| MER | Mars Exploration Rover |
| MER | Mission Evaluation Room |
| MER | Maximum Error Rate |
| MERIS | Medium Resolution Imaging Spectrometer |
| MERLIN | Methane Remote Sensing Lidar Mission |
| MEROPE | Montana Earth Orbiting Pico-Explorer |
| MES | Modified GAS Ejection System |
| MESA | miniature electrostatic accelerometer |
| MESSENGER | Mercury Surface, Space Environment, Geochemistry & Ranging |
| MESSENGER | MErcury Surface, Space ENvironment, GEochemistry, and Ranging |
| MESUR | Mars Environmental Survey |
| MET | mission elapsed time |
| MET | Marshall engineering thermosphere model |
| METEOR | Multiple Experiment Transport to Earth Orbit & Return |
| METEORS | Mesosphere - Thermosphere Emissions for Ozone Remote Sensing |
| METERON | Multi-Purpose End-To-End Robotic Operation Network |
| METI | Ministry of Economy Trade & Industry (Japan) |
| METOP | Meteorological Operational Satellite |
| METSAT | Meteorological Satellite |
| MEV | Mission Extension Vehicle |
| MEX | Mars Express |
| MEaSUREs | Making Earth System data records for Use in Research Environments |
| MF | multifiltration |
| MF | Multi-frequency |
| MFC | Microgravity Facilities for Columbus |
| MFDB | Mission Flight Database |
| MFR | Multifunction Receiver |
| MFU | multifiltration unit |
| MGA | Mass Growth Allowance |
| MGA | Medium Gain Antenna |
| MGM | Mars Global Mapper |
| MGMT | Management |
| MGR | Manager |
| MGS | Mars Global Surveyor |
| MGS | McMurdo Ground Station |
| MGSE | mechanical ground support equipment |
| MGSO | Multi-mission Ground Systems Office |
| MGT | management file |
| MHD | MagnetoHydroDynamic |
| MHI | Mitsubishi Heavy Industries, Ltd. |
| MHSEALS | Multilateral Hardware & Software Exchange Agreements, Lists, & Schedules |
| MHz | megahertz |
| MI | Magnetospheric Imaging |
| MI | Minority serving Institutions |
| MI&U | Mission Integration & Utilization |
| MIA | Multiplexer Interface Adapter |
| MIA | Mission Integration Assessment |
| MIB | Mishap Investigation Board |
| MIC | materials identification card |
| MICAP | Monte Carlo Ionization Chamber Analysis Package |
| MICD | mechanical interface control document |
| MICINN | Spanish Space Agency |
| MICROSCOPE | Microsatellite à traînée Compensée pour l'Observation du Principe d'Equivalence |
| MIDAS | Military Defense Alarm System |
| MIDEX | Medium-Class Explorer |
| MIDEX | Mid-Sized Explorer |
| MIDEX | Medium Class Explorer |
| MIF | mode indicator function |
| MIG | metal inert gas (welding) |
| MIG | metal inert gas |
| MIIS | Mission / Increment Integration Service Manager |
| MIL | (spec) specification of the US Department of Defense |
| MIL-DTL | military detail specification |
| MIL-PRF | military performance specification |
| MIL-STD | military standard |
| MIL-STD | United States military standard |
| MILA | Merritt Island Launch Annex and call sign |
| MIM | multi-increment manifest |
| MIM | Maliy Issledovatel'ny Modul' |
| MIM | Multi Increment Manifest |
| MIMO | multiple-input–multiple-output |
| MIMOSA | Micro Measurements Of Satellite Acceleration |
| MIMT | Multi-Increment Management Team |
| MIOCB | Mission Integration & Operations Control Board |
| MIP | mission integration plan |
| MIRAX | Monitor e Imageador de Raios-X |
| MIRCA | Micro Reentry Capsule |
| MIRI | Mid-infrared Instrument (James Webb Space Telescope instrument) |
| MIRKA | Mikro-Rückkehrkapsel |
| MIS | Management Information System |
| MIS | Mission Information System |
| MISR | Multi-angle Imaging SpectroRadiometer |
| MISSE | Materials International Space Station Experiment |
| MISSE | Materials ISS Experiment |
| MISSE-X | Materials International Space Station Experiment-X |
| MIT | Massachusetts Institute of Technology |
| MIT LL | MIT Lincoln Laboratory |
| MITA | Mini-Satellite Italiano a Tecnologia Avanzata |
| MITAC | Medical Informatics & Technology Application Center |
| MITP | multilateral increment training plan |
| MIUP | Multi-Increment Utilisation Plan |
| MIV | Manual Isolation Valve |
| MIVR | Mission Integration & Verification Review |
| MKE | mean knowledge error |
| ML | Monitoring Limits |
| MLAR | multi-layer anti-reflection coating |
| MLC | Master List Custodian |
| MLCD | Mars Laser Communications Demonstrator |
| MLE | middeck locker equivalent |
| MLI | Multi-Layer Insulation |
| MLM | Multipurpose Laboratory Module / Mnogozelewoi Laboratorny Modul |
| MLM-U | Multipurpose Laboratory Module - Usovershenstvovanny / Mnogozelewoi Laboratorny Modul - Upgrade |
| MLP | Monthly Look-ahead Plan |
| MLS | Microwave Limb Sounder |
| MLS | Microwave Landing System |
| MLT | magnetic local time |
| MLU | Module Lighting Unit |
| MM | Milimeter |
| MM | machine model |
| MM/OD | micrometeoroid/orbital debris |
| MMC | Mission Management Computer |
| MMC | Mathematics Modeling Center |
| MMCC | metal monolith catalytic converter |
| MMD | Mass Measurement Device |
| MMDB | Mission Model Data Base |
| MME | mean measurement error |
| MMEEV | Multi-Mission Earth Entry Vehicle |
| MMF | Multi-Mode Fibre |
| MMH | MonoMethyl Hydrazine |
| MMH | Medical Monitoring Harness |
| MMI | Mission Management and Integration (CCP office) |
| MMI | man-machine interface |
| MMIC | microwave monolithic integrated circuit |
| MMIC | monolithic microwave integrated circuit |
| MMIF | multi-variate MIF |
| MMM | Mission Management Meetings |
| MMMT | Multilateral Medical Management Team |
| MMO | Mars Mission Operations |
| MMOD | Micrometeoroid / Orbital Debris |
| MMOP | Multilateral Medical Operations Panel |
| MMOWG | Multilateral Medical Operations Working Group |
| MMPB | Multilateral Medical Policy Board |
| MMPDS | Metallic Materials Properties Development & Standardisation |
| MMPDS | metallic materials properties development & standardization |
| MMPP | Materials, mechanical parts & processes |
| MMS | Magnetospheric Multiscale |
| MMS | Magnetospheric Multiscale Satellite |
| MMS | Multi-mission Modular Spacecraft |
| MMSEV | Multi-Mission Space Exploration Vehicle |
| MMSF | Modified Micro Square Fixture (SPDA) |
| MMT | Multiple Mirror Telescope |
| MMT | Mission Management Team |
| MMTE | Mission Management & Timeline Execution |
| MMU | Mass Memory Unit |
| MMU | Manned Maneuvering Unit |
| MMWS | workstation,modular MWS |
| MNRAS | Monthly Notices of the Royal Astronomical Society |
| MNTV | Mercury Network Test Vehicle |
| MO | Mission Operations |
| MO | Malaysian Oscar |
| MO | Mexican Oscar |
| MO | Mars Observer |
| MO | Missions of Opportunity |
| MO | Mars Orbiter |
| MO&DSD | Mission Operations & Data Systems Directorate |
| MO&U | CB Multilateral Operations & Utilization Control Board |
| MOA | Memorandum Of Agreement |
| MOAS | Multi-Media Operations Archive Subsystem – obsolete / part of INFRA |
| MOB | mission objective baseline |
| MOC | Mission Operations Center/Complex |
| MOC | Mars Observer Camera (on MO & MGS) |
| MOCB | Mission Operations Control Board |
| MOCD | mission operations concept document |
| MOCS | Model Observation & Control System (obsolete) |
| MOCS | Mission Operations and Communications System |
| MOD | mission operations directorate |
| MOD | Mission Operations Director |
| MODIS | Moderate Resolution Imaging Spectroradiometer |
| MODNET | MO&DSD Operational/Development Network |
| MOE | Mission Operations Element |
| MOE | Measures of Effectiveness |
| MOE | Mission Operations Environment |
| MOI | moment of inertia |
| MOIC | Mission Operations Implementation Concept |
| MOIIP | Mission Operations Integration Implementation Plan |
| MOIM | Mission Operations Integration Management |
| MOIMS | Mission Operational and Information Management Services |
| MOIO | Mission Operations Integration Office |
| MOIP | Mission Operations Implementation Plan |
| MOL | Manned Orbiting Laboratory |
| MOL | Manned Orbital Laboratory |
| MOL | Mission Operations Laboratory |
| MOL-HSQ | Manned Orbital Laboratory - Heat Shield Qualification Test |
| MOLA | Mars Observer Laser Altimeter (on Mars Observer) |
| MOMS | Mission Operations and Mission Services |
| MOMV | Manned Orbital Maneuvering Vehicle |
| MON | Monitoring |
| MOP | Meteosat Operational Programme |
| MOPITT | Measurement of Pollution in the Troposphere |
| MOPITT | Measurements of Pollution in the Troposphere |
| MOPSS | Mission Operations Planning and Scheduling System |
| MOR | Mission Operations Room |
| MORSE | Multigroup Oak Ridge Stochastic Experiment - coupled neutron-g-ray Monte Carlo radiation transport code |
| MOS | Mission Operations Services (DLR ops contract) |
| MOS | Mission Operation Service |
| MOS | Marine Observation Satellite |
| MOS | Mission Operations Summary |
| MOSA | Mission Ops Support Area |
| MOSFET | metal oxide semiconductor field effect transistor |
| MOSO | Multi-mission Operations Support Office |
| MOSS | Multimedia Operations Support Subsystem |
| MOST | Microvariability & Oscillation of Stars |
| MOTS | modified off-the-shelf |
| MOTV | Manned Orbital Transfer Vehicle |
| MOU | Memorandum of Understanding |
| MOVE | Mission Operations Voice Enhancement |
| MOVE | Mission Operations Voice Enhancement\ |
| MP | Mass Properties |
| MPAR | Major Program Annual Report |
| MPC | Minor Planets Circular |
| MPCB | materials & processes control board |
| MPCB | material & processes control board |
| MPCB | Material, Mechanical Parts & Processes Control Board |
| MPCC | Multi-Purpose Communication Computer |
| MPCV | Multipurpose Crew Vehicle |
| MPCV | Multi-Purpose Crew Vehicle |
| MPCV-ESM | Multi-Purpose Crew Vehicle European Service Module |
| MPD | magneto-plasma-dynamic thruster |
| MPDL | mechanical pump driven loop |
| MPE | mean performance error |
| MPEC | Minor Planets Electronic Circular |
| MPEG | Moving Picture Experts Group |
| MPEP | Multi-Purpose Experiment Platform (JEM AL,RMS) |
| MPESS | Multi-Purpose Equipment Support Structure |
| MPEV | Manual Pressure Equalization Valve |
| MPF | Mars Pathfinder |
| MPIM | Multi-Program Integrated Milestones |
| MPL | Mars Polar Lander |
| MPLM | Mini Pressurized Logistics Module |
| MPLM | Multi-Purpose Pressurised Logistics Module |
| MPLM | multipurpose logistics module |
| MPLM | Multipurpose Logistic Module or Mini-Pressurized Logistic Module) |
| MPLS | Multi protocol label switching |
| MPM | Manipulator Positioning Mechanism |
| MPM | Multi Purpose Module |
| MPMI | Multi-Increment Payload Mission Integration |
| MPOA | Multi-Protocol over ATM |
| MPOE | Multipurpose Outfitting Equipment |
| MPP | Milestone Payment Plan |
| MPPF | Multi-Payload Processing Facility |
| MPPT | maximum power point tracker |
| MPR | Manual Pulmonary Resuscitator |
| MPS | Mission Preparation Software |
| MPSD | Multi-Purpose Support Drive |
| MPSR | Multi-Purpose Support Room |
| MPTP | Multilateral Payload Training Panel |
| MPV | manual procedure viewer |
| MPW | magnetic pulse welding |
| MPa | Megapascal |
| MR | Monitoring Result |
| MR | Mars Relay |
| MR | Mercury Redstone |
| MR-BD | Mercury Redstone - Booster Development |
| MRAD/HR | Millirad per hour |
| MRB | Material Review Board |
| MRB | Microgravity Rack Barrier |
| MRCAR | Middeck Requirements Change Assessment Report |
| MRD | Mission Requirements Document |
| MRD | Microgravity Research Division |
| MRDL | medium rate data link |
| MRDL | Medium Rate Data Line |
| MRE | measurement reproducibility error |
| MRF | Maintenance & Repair Facility |
| MRF | mechanical reference frame |
| MRG | Maintenance & Repair Group |
| MRHWG | Multilateral Radiation Health Working Group |
| MRI | Magnetic Resonance Imaging |
| MRID | Medical Requirements Implementation Doc. |
| MRK | MSMK Re-supply Kit |
| MRL | Manipulator Retention Latch |
| MRM | Mini Research Module |
| MRM1 | Mini Research Module No. 1 |
| MRMDF | Multi-use Remote Manipulator Development Facility |
| MRO | Mars Reconnaissance Orbiter |
| MRO | MSS Robotics Operator |
| MRR | Mission Readiness Review |
| MRR | Mission Requirement Request |
| MRSR | Mars Rover & Sample Return |
| MRSRM | Mars Rover & Sample Return Mission |
| MRT | mission readiness tests |
| MRT | Mission Readiness Test |
| MS | Mercury Scout |
| MS | Monitoring Status |
| MS/S | mega symbols per second |
| MSA | MUREP Small Activities |
| MSAM | Mars Surface Access Module |
| MSB | most-significant bit |
| MSB | most significant bit |
| MSBLS | Microwave Scanning Beam Landing System |
| MSC | mobile servicing center |
| MSD | Mission Support Directorate |
| MSD | mass storage device |
| MSD | Multi Satellite Dispenser |
| MSE | Mission Support Environment |
| MSET | Multilateral Sustaining Engineering Team |
| MSFC | Marshall Space Flight Centre |
| MSFC | NASA George C. Marshall Space Flight Center |
| MSFC | Marshall Space Flight Center |
| MSFN | Manned Space Flight Network |
| MSG | Meteosat Second Generation |
| MSG | Microgravity Science Glovebox |
| MSID | Measurement & Stimulus Identification |
| MSIS | mass spectrometer & incoherent scatter |
| MSL | materials science laboratory |
| MSL | Material Science Laboratory |
| MSL | Mission Support LAN |
| MSL | Mars Science Laboratory |
| MSL-EML | Material Science Laboratory – Electromagnetic Levitator |
| MSLS | Multiservice Launch Systems (Minuteman II) |
| MSM | Monthly Status Meeting |
| MSM | Manned Spaceflight & Microgravity |
| MSM | Mission and Science Measurement Technology |
| MSM | Manned Spaceflight & Micro-Gravity |
| MSM-GS | MSM Ground Segment |
| MSMB | Multilateral Space Medicine Board |
| MSMK | Mir Supplemental Medical Kit |
| MSNA | Muscle Sympathetic Nerve Activity |
| MSO | Mission Science Office |
| MSO | Mars Science Orbiter |
| MSOC | Mission Support Operations Contract |
| MSOCC | Multi-Satellite Operations Control Center |
| MSP | Manned Space Program |
| MSPE | metallic special pressurized equipment |
| MSR | Mars sample return |
| MSR | Mission Support Room |
| MSR | Mission Support Request |
| MSR | Monthly Status Reviews |
| MSRD | Module Systems Requirements Document |
| MSRE | Mir Sample Return Experiment |
| MSRF | materials science research facility |
| MSRR | Medilog Sleep Research Recorder |
| MSRR | materials science research rack |
| MSS | Magnetospheric MultiScale |
| MSS | mobile servicing system |
| MSS | Mass Storage System |
| MSSTA | Multispectral Solar Telescope Array |
| MST | modal survey test |
| MSTI | Miniature Sensor Technology Integration |
| MSTO | Mars Science and Telecommunications Orbiter |
| MSU | Monitoring & Safing Unit (CAM system) |
| MSV | MPLM Support Vehicle |
| MSVP | safety critical mechanisms verification plan |
| MSVR | safety critical mechanisms verification report |
| MSX | Midcourse Space Experiment |
| MSat | Mobile Communication Satellite |
| MT | mobile transporter |
| MT-Sat | Multifunctional Transport Satellite |
| MT2E | MPCC Test & Training Environment |
| MTA | milestone trend analysis |
| MTBF | Mean Time Between Failure |
| MTBF | Mean Time Between Failures |
| MTBO | mean time between outages |
| MTC | Man Tended Capability |
| MTCL | MT capture latch |
| MTCube | Memory Test CubeSat |
| MTE | Monitoring Table Entry |
| MTE | MPCC Training Enhancement |
| MTI | Multispectral Thermal Imager |
| MTL | Master Timeline |
| MTL | moderate-temperate loop |
| MTLO | Moscow Technical Liaison Office |
| MTO | Mars Telecommunications Orbiter |
| MTO | metal turnover |
| MTP | Meteosat Transition Programme |
| MTPE | Mission to Planet Earth |
| MTRS | McMurdo TDRSS Relay System |
| MTS | Meteoroid Technology Satellite |
| MTSAS | module truss structures attachment system |
| MTTF | mean time to failure |
| MTTFF | mean time to first failure |
| MTTO | mean time to outage |
| MTTR | Mean Time to Repair |
| MTTR | Max Time To Repair |
| MTV | Mars Transfer Vehicle |
| MUA | Material Use Agreement |
| MUA | Material Usage Agreement |
| MUBLCOM | Multiple Path Beyond Line of Sight Communication |
| MUE | MDM Utility Extension |
| MULASSIS | Multi-Layered Shielding Simulation Software |
| MUM | mechanism user manual |
| MUREP | Minority University Research & Education Project |
| MUSC | Microgravity User Support Center |
| MUSS | Multi-User Systems & Support |
| MUST | Motivating Undergraduates in Science & Technology |
| MUT | mean up time |
| MUT | tether,multi-use t. |
| MV | Maneuvering Vehicle |
| MVC | Maximal voluntary contraction |
| MVCB | Multi-Lateral Vehicle Control Board |
| MVD | Mirrored Vital data |
| MVDB | Master Verification Data Base |
| MVDS (or VIDS) | Mission Video Distribution System |
| MVM | Mission & Vehicle management |
| MWF | Must Work Function |
| MWG | Manifest Working Group |
| MWIR | medium-wavelength infrared |
| MWL | Microwave Link (ACES) |
| MWL GT | Microwave Link Ground Terminal (ACES) |
| MWR | Microwave Radiometer |
| MWS | workstation,mini-workstation |
| MWt | molecular weight |
| MaRS | Metrics and Reporting Study |
| MaSat | Magyar Satellite |
| MagEIS | Magnetic Electron Ion Spectrometer instruments |
| Magic | Magnetospheric Interkosmos |
| Magsat | Magnetic Field Satellite |
| Maj | major |
| Mal | malfunction |
| Man | manual |
| MarCO | Mars Cube One |
| Marisat | Maritime Satellite |
| Mat | matrix |
| Mb/s | Megabits per second |
| Mbps | Megabits per second |
| Meas | measurement |
| Mech | mechanical |
| Med C/L | medical checklist |
| MegSat | Meggiorin Satellite |
| Meteosat | Meteorological Satellite |
| MiRaTA | Microwave Radiometer Technology Acceleration |
| MiSS | Multi-functional Smart Skin |
| Microb | Mission Change Review Operations Board |
| Milstar | Military Strategic & Tactical Relay |
| Min | minimum value |
| MinXSS | Miniature X-ray Solar Spectrometer |
| MisST | Microsatellite in-situ Space Technologies |
| Mn | main |
| Mnvr | maneuver (burn) |
| MoM | minutes of meeting |
| Mod | modify |
| Mod | modulator |
| Moon | ’s Interaction with the Sun |
| Moonlight | Lunar Comms & Navigation System |
| Msps | mega symbol per second |
| Mtr | motor |
| MuSat | Mu (Micro) Satellite |
| Mult | multiple; multiply |
| Muses | Mu Space Engineering Satellite |
| MySat | Malaysian Satellite |
| N | nominal |
| N | newton (unit of force,SI) |
| N | node |
| N-Char | normal character |
| N-Char | normal-character |
| N-ISDN | Narrow Band ISDN |
| N-Star | Nippon Star |
| N-USOC | Norway (Trondheim) |
| N/W | Network |
| N1 | Node One |
| N2 | Node Two |
| N3SYS2 | Node 3 System 2 |
| NABEO | Nanosat Bremssegel Entfaltversuch im Orbit |
| NAC | Network and Communications |
| NAC | NASA Advisory Council |
| NAC | NASA Advisory Committee |
| NACA | National Advisory Committee on Aeronautics (became NASA) |
| NACAIT | Network And Communication Analysis & Integration Team |
| NACAIT | Network & Communications Analysis & Integration Team (sub-panel of ISS GSCB) |
| NACC | NASA ADP Consolidated Center |
| NACK | negative acknowledgement |
| NAFCOM | NASA Air Force Cost Model |
| NAI | National Aerospace Initiative |
| NALF | Naval Auxiliary Landing Field |
| NAOS | National Advanced Optical System |
| NAR | Non-Advocacy Review |
| NARA | National Archives and Records Administration |
| NAS | Naval Air Station |
| NAS | Numerical Aerodynamic Simulation |
| NAS | Network Attached Storage |
| NAS | National Airspace System |
| NASA | National Aeronautics & Space Administration |
| NASA | National Aeronautics and Space Administration |
| NASA HALO | Habitation Module |
| NASA HOSC | Nasa Huntsville Operations Support Centre, incorporating the Payload Operations & Integration Centre |
| NASA JSC | Nasa Johnson Space Centre, incorporating the Mission Control Centre Houston |
| NASCOM | NASA Communications 2000 |
| NASCOM | NASA Communications Network |
| NASCOM | NASA Communications System (now NISN) |
| NASCOP | NASA Communications Operating Procedures |
| NASDA | NAtional Space Development Agency (Japan) |
| NASDA | National Aeronautics and Space Development Agency of Japan; National Aeronautics/Space Development Agency of Japan |
| NASDA | National Space Development Agency of Japan |
| NASIRC | NASA Automated Systems Incident Response Capability |
| NASM | National Air & Space Museum |
| NASP | National AeroSpace Plane |
| NASTRAN | NASA Structural Analysis |
| NATO | North Atlantic Treaty Organisation |
| NAVISP | Navigation Innovation & Support Programme |
| NBF | Neutral Buoyancy Facility |
| NBL | Neutral Buoyancy Facility |
| NBS | National Bureau of Standards |
| NBS | National Bureau of Standards (now NIST) |
| NC | Nominal Correction (phase angle adjustment) |
| NC | Nominal Catchup (Phasing Maneuver) |
| NC | maneuver,Nominal Catchup (Phasing Maneuver) |
| NC | nozzle closed |
| NC2MS | NICS Consolidated Configuration Management System |
| NCAR | National Center for Atmospheric Research |
| NCAS | NASA Contract Assurance Services |
| NCC | Nominal Correction Combination (maneuver) |
| NCC | netlist comparison check |
| NCC | Network Control Center |
| NCCDS | Network Control Center Data System |
| NCDC | National Climatic Data Center |
| NCG | Non-Condensable Gas |
| NCHX | Non-Condensing Heat Exchanger |
| NCI | NASA Collaborative Infrastructure |
| NCI | National Cancer Institute (National Institutes of Health) |
| NCMA | National Contract Management Association |
| NCMS | NICS Configuration Management System |
| NCO | National Coordination Office |
| NCP | Network Control Program |
| NCR | report,Non-Compliance Report |
| NCR | Non Conformance Record |
| NCR | Non-Compliance Report |
| NCRP | National Council on Radiation Protection & Measurements |
| NCRP | National Committee on Radiation protection |
| NCS | Node Control Software |
| NCS | National Communications System |
| NCTAMS | Naval Computer and Telecommunications Area Master Station |
| NDA | Non-Disclosure Agreement |
| NDC | Notification of Document Change (see also DCN) |
| NDD | No-Direct Dazzling |
| NDE | non-destructive evaluation |
| NDI | non-destructive inspection |
| NDS | Neuroscientific Data Station |
| NDS | Nuclear Detection Satellite |
| NDT | non-destructive test |
| NDV | NASP Derived Vehicle |
| NDVI | Normalized Difference Vegetation Index |
| NE | Near Earth |
| NE | Norepinephrine |
| NEA | Near Earth Asteroid |
| NEAR | Near Earth Asteroid Rendezvous |
| NEAR | Near Earth Asteroid Rendezvous (now named NEAR Shoemaker) |
| NEBULA | NASA's Cloud Computing Platform |
| NEEMO | Nasa Extreme Environment Mission Operations |
| NEMO | Naval Earth Map Observer |
| NEMS | NASA Equipment Management System |
| NEN | Near-Earth Network (formerly: GN,Ground Network; now the Near Space Network) |
| NEN | Near Earth Network |
| NENS | Near Earth Networks Services |
| NENUG | Near Earth Network User’s Guide |
| NEO | Near Earth Object |
| NEO | Near-Earth Object |
| NEOO | Near-Earth Object Observations |
| NEOWISE | Near-Earth Object Wide-field Infrared Survey Explorer |
| NEP | Nucno-Energeticeskaya Platforma |
| NEPA | National Environmental Policy Act |
| NERDS | NASA Electronic Radio Database System |
| NERN | Near Earth Relay Network |
| NERV | Nuclear Emulsion Recovery Vehicle |
| NERVA | Nuclear Engine for Rocket Vehicle Application |
| NES | NASA Explorer Schools |
| NESC | NASA Engineering & Safety Center |
| NESP | NASA Engineering Standards Panel |
| NET | Not Earlier Than |
| NETEX | Network Executive |
| NETS | NASA Educational Technology Services |
| NETSIM | Network Simulator |
| NEX | NASA Excepted Service |
| NEXRAD | Next Generation Radar |
| NEXT | NASA Evolutionary Xenon Thruster |
| NEXTSat/CSC | Next Generation Satellite & Commodities Spacecraft |
| NEXUS | Next Generation X Unique Satellite |
| NExScI | NASA Exoplanet Science Institute |
| NF | Noise Figure |
| NFIRE | Near Field Infrared Experiment |
| NFS | NASA FAR Supplement |
| NFS | Network File System |
| NG | Nasogastric tube |
| NG | NewsGroup |
| NGAS | Northrup Grumman Aerospace Systems |
| NGC | New General Catalog |
| NGD | normal gradient discharge |
| NGI | Next Generation Internet |
| NGIMS | Neutral Gas & Ion Mass Spectrometer |
| NGIN | Next Generation Integrated Network |
| NGIS | Northrop Grumman Innovation Systems |
| NGLT | Next Generation Launch Technology |
| NGO | Non-Governmental Organization |
| NGPS | Next Generation Planning System |
| NGSS | Next Generation Sky Survey |
| NGST | Northrop Grumman Space Technology |
| NGST | Next Generation Space Telescope |
| NGST | Next Generation Space Telescope (see also: JWST) |
| NH | maneuver,Nominal Height Adjust (Altitude Raising Maneuver) (CST-100) |
| NH | Nominal Height Adjust (Altitude Raising Maneuver) (CST-100) |
| NH | Northern Hemisphere |
| NH3 | Ammonia |
| NHB | NASA Handbook |
| NHLBB | non-hazardous leak before burst |
| NIA | nitrogen interface assembly |
| NIAC | NASA Innovative Advanced Concepts |
| NIC | Network Integration Center |
| NICE | NASA Innovations in Climate Education |
| NICER | Neutron star Interior Composition ExploreR |
| NICMOS | Near Infrared Camera / Multi Object Spectrometer (HST upgrade) |
| NICS | NASA Information Configuration Services |
| NID | non-ionising dose (identical to TNID) |
| NID | NASA Interim Directive |
| NIE | Networks Integration and Engineering |
| NIEL | non-ionizing energy loss |
| NIEL | non-ionising energy loss |
| NIF | NASCOM Interface Facility |
| NIH | National Institute for Health |
| NIH | National Institutes of Health |
| NII | National Information Infrastructure |
| NIM | Networks Integration Manager |
| NIMO | Networks Integration Management Office |
| NIMS | Near-Infrared Mapping Spectrometer (on Galileo) |
| NIMS | Network Information Management System |
| NIR | Near InfraRed |
| NIRCam | Near-Infrared Camera |
| NIRSpec | Near-Infrared Spectrometer |
| NIS | Network Infrastructure Subsystem |
| NIS | Network Information System |
| NIS | Network Information System (ColCC) |
| NISAR | NASA-ISRO Synthetic Aperture Radar |
| NISN | NASA Integrated Services Network |
| NISSU | NASA Information Systems Services Utility |
| NIST | National Institute of Standards and Technology |
| NIST | National Institute of Standards & Technology (was NBS) |
| NIVR | Netherlands Agency for Aerospace Programs |
| NLDN | National Lightning Detection Network |
| NLDP | National Launch Development Program |
| NLR | National Aerospace Laboratory of the Netherlands |
| NLS | NASA Launch Services |
| NLSI | NASA Lunar Science Institute |
| NLT | Not Later Than |
| NLTE | Non Local Thermodynamic Equilibrium |
| NMC | Network Monitor and Control |
| NMC | Network Management Center |
| NMC | National Center for Atmospheric Research |
| NME | Non-Maintainable Equipment |
| NMI | Nautical Mile |
| NMI | NASA Management Instruction |
| NMO | NASA Management Office |
| NMOS | N-channel metal oxide semiconductor |
| NMP | New Millenium Program |
| NMS | Network Management System |
| NMS | Neutral Mass Spectrometer |
| NMS | New Member States |
| NMSU | New Mexico State University |
| NMT | network management |
| NMTSat | New Mexico Tech Satellite |
| NNS | Navy Navigation Satellite |
| NNSG | NASCOM Network Scheduling Group |
| NO | Naval Oscar |
| NO | nozzle open |
| NO2 | Nitrogen Dioxide |
| NOA | New Obligational Authority |
| NOAA | National Oceanic & Atmospheric Administration |
| NOAA | National Oceanographic and Atmospheric Administration |
| NOAO | National Optical Astronomy Observatories |
| NOC | Networks Operations Center |
| NOCT | Network Operations Control Team |
| NODC | National Ocean Data Center |
| NODIS | NASA Online Directives Information System |
| NOLAN | NASCOM Operational Local Area Network |
| NOP | Network Operations Plan |
| NOPE | Network Operations Project Engineer |
| NOR | Northrup Lakebed Landing Site |
| NORAD | NORth American aerospace Defense |
| NORAD | North American Air Defense Command |
| NOSA | Norwegian Space Agency (formerly: NSC,Norwegian Space Center) |
| NOSP | Network Operations Support Plan |
| NOSS | Navy Ocean Surveilance Satellite |
| NOSS-MSD | Navy Ocean Surveilance Satellite - Multi Satellite Dispenser |
| NOSS-TLD | Navy Ocean Surveilance Satellite - Titan Launch Dispenser |
| NOTS | Nitrogen/Oxygen Transfer System |
| NOVICE | 3-D Radiation transport simulation code developed by Experimental & Mathematical Physics Consultants, Gaithersburg, USA |
| NOx | Nitrogen Oxide |
| NPAS | Network Planning and Analysis System |
| NPAT | National Partnership for Aeronautic alTesting |
| NPC | Nominal Plane Change (CST-100) |
| NPC | maneuver,Nominal Plane Change (CST-100) |
| NPCC | nonpressurized cargo carrier |
| NPD | NASA Policy Directive |
| NPG | NASA Procedures and Guidelines |
| NPI | National Partnership Initiative |
| NPLD | North Polar Layered Deposit |
| NPN | bipolar junction transistor with P-type base |
| NPO | Non-Profit Organization |
| NPOES | National Polar-orbiting Operational Environmental Satellite |
| NPOESS | National Polar–orbiting Operational Environmental Satellite System |
| NPOESS | National Polar-Orbiting Operational Environmental Satellite System |
| NPP | Suomi National Polar orbiting Partnership (new name for NPOESS) |
| NPP | Network Planning and Preparation |
| NPP | NPOESS Preparatory Project |
| NPP | Net Primary Productivity |
| NPPS | NASA Personnel and Payroll System |
| NPR | National Performance Review |
| NPR | NASA Procedural Requirement |
| NPS-SCAT | Naval Postgraduate School Solar Cell Array Tester |
| NPSL | NASA parts selection list |
| NPSP | net positive suction pressure |
| NPSat | Naval Postgraduate School Satellite |
| NPV | Non-Propulsive Vent |
| NRA | NASA Research Announcement |
| NRAO | National Radio Astronomy Observatory |
| NRB | nonconformance review board |
| NRC | National Research Council |
| NRCC | National Research Council Canada |
| NRE | Non Recurring Engineering |
| NREL | National Renewable Energy Laboratory |
| NREN | NASA Research and Education Network |
| NRF | network-model & results format |
| NRL | Naval Research Laboratory |
| NRL-PL | Naval Research Laboratory Payload |
| NRO | National Reconnaissance Office |
| NRPTA | National Rocket Propulsion Test Alliance |
| NRT | Near Real-Time |
| NRTM | Near-Real-Time Monitoring |
| NRZ | non return to zero |
| NRZ | non-return to zero |
| NRZ-L | non-return to zero level |
| NRZ-L | non return to zero-level |
| NRZ-L | NRZ Level |
| NRZ-L | NRZ-level |
| NRZ-M | non-return to zero mark |
| NRZ-M | non return to zero-mark |
| NRZ-M | non-return-to-zero-mark |
| NRZ-M | NRZ Mark |
| NS | Neutron Star |
| NS | Network Services |
| NSA | National Security Agency |
| NSAID | Nonsteroidal Anti-Inflammatory Drug |
| NSAP | Network Service Assurance Plan |
| NSBRI | National Space Biomedical Research Institute |
| NSC | NASA Safety Center |
| NSCC | NASCOM Security Control Center |
| NSCP | National Space Communications Program |
| NSD | Network Services Division |
| NSD | NISN Services Document |
| NSDP | NASCOM System Development Plan |
| NSEP | National Security Emergency Preparedness |
| NSF | National Science Foundation |
| NSI | NASA Science Internet |
| NSI | Nuclear Systems Initiative |
| NSMG | NASA Spectrum Managers Group |
| NSN | Near Space Network (formerly: NEN— Near Earth Network and SN,Space Network) |
| NSO | National Solar Observatory |
| NSP | Network Support Plan |
| NSPD | National Space Policy Directive |
| NSPO | National Space Program Office (Taiwan) |
| NSPSEWG | Network Services Projects Systems Engineering Working Group |
| NSR | Nominal Slow Rate (Co-elliptic Maneuver) |
| NSR | maneuver,Nominal Slow Rate (Co-elliptic Maneuver) |
| NSR | NISN Service Request |
| NSRPC | maneuver,Nominal Slow Rate & Plane Change |
| NSRPC | Nominal Slow Rate & Plane Change |
| NSS | New Skies Satellite |
| NSSA | National Security Space Architect |
| NSSC | NASA Shared Services Center |
| NSSDC | National Space Science Data Center |
| NSSL | National Security Space Launch (formerly: EELV,Evolved Expendable Launch Vehicle) |
| NSST | Neutral Salt Spray Test |
| NSTAC | National Security Telecommunications Advisory Committee |
| NSTC | National Science and Technology Council |
| NSTC | National Science & Technology Council |
| NSTI-MSI | NASA Science & Technology Institute for Minority Serving Institutions |
| NSTS | National Space Transportation System (NASA Space Shuttle) |
| NSTS | NASA Space Transportation System |
| NSWPC | National Space Weather Program Council |
| NSYS | Node System |
| NSpC | National Space Council |
| NTA | nitrogen tank assembly |
| NTC | NASA Teleconferencing Center |
| NTC | NASA Technical Capabilities |
| NTD | NASA Test Director |
| NTDC | NASA Technical Capabilities Database |
| NTEC | NASA Technology Executive Council |
| NTIA | National Telecommunications and Information Administration |
| NTIA | National Telecommunications & Information Administration |
| NTO | tetroxide,diNitrogen Tetroxide (commonly referred to as nitrogen tetroxide) |
| NTO | nitrogen tetroxide |
| NTP | Netrix Trunk Protocol |
| NTP | Network Time Protocol |
| NTR | Nuclear Thermal Rocket(ry) |
| NTS | Navigation Technology Satellite |
| NTSP | NASA Technical Standards Program |
| NTT | New Technology Telescope |
| NTTF | Networks Technical Training Facility |
| NUDTSat | National University of Defense Technology Satellite |
| NUREG | Nuclear Regulatory Commission Regulation |
| NUREG | U.S. Nuclear Regulatory Commission, Washington, DC |
| NUREG-CR | US Nuclear Regulatory Commission contractor report |
| NUV | Near Ultraviolet |
| NVP | NOCC Very Long Baseline Interferometry (VLBI) Processor |
| NVR | non-volatile residue |
| NVTS | NASCOM Video Transponder Service |
| NW | negative window |
| NWF | Next Worst Failure |
| NWF | failure,Next Worst Failure |
| NWP | Numerical Weather Prediction |
| NWS | National Weather Service |
| NWSW | Network Software |
| Nav | navigation |
| Navstar | Navigation System using Timing & Ranging |
| Ncube | Norwegian Cubesat |
| Neg | negative |
| Net | network |
| NextGen | Next Generation Air Transportation System |
| Nodes | Network & Operation Demonstration Satellite |
| Nom | nominal |
| NuSTAR | Nuclear Spectroscopic Telescope Array |
| Nusat | North Utah Satellite |
| O | Operational (Transit) |
| O&C | Operations & Checkout (building) |
| O&C | Operations & Checkout |
| O&C | Operations and Checkout |
| O&M | Operations & Maintenance |
| O&M | Operations and Maintenance |
| O&U | Operation & Utilisation |
| O-OHA | On-Orbit Hearing Assessment |
| O/B | On-Board |
| O/D | On Dock |
| O/OREOS | Organics and/or Organisms Exposure to Orbital Stresses |
| O/S | Operating System |
| O2 | Oxygen |
| O2O | Orion Artemis II Optical Communications System |
| O; Ovhd | overhead |
| OA | Office of Audits |
| OAA | Orbiter Access Arm |
| OAFS | Onizuka Air Force Station |
| OAO | Orbiting Astronomical Observatory |
| OAR | Operations Assessment Report |
| OARE | orbital acceleration research experiment |
| OASPL | Overall Sound Pressure Level |
| OAST-Flyer | Office of Aeronautics & Space Technology Flyer |
| OB | On-Board |
| OBAP | on-board application procedure |
| OBAS | Orbiter Body Axis System |
| OBC | on-board computer |
| OBC | on board computer |
| OBCP | original baseline cost plan |
| OBCP | on-board control procedure |
| OBDH | on-board data handling |
| OBE | Onboard Equivalent |
| OBOP | on-board operations procedure |
| OBS | organizational breakdown structure |
| OBS | Operational bioinstrumentation system |
| OBSM | on-board software maintenance |
| OBSM | on‐board software maintenance |
| OBSW | on-board software |
| OBT | Onboard Training |
| OBT | On-Board Training |
| OBTWG | On-Board Training Working Group |
| OC | Optical Carrier |
| OC | Operations Controller |
| OCA | Orbital Communications Adapter |
| OCA | Orbital Communication Adapter |
| OCA | orbiter communications adapter |
| OCACT | Ohio Consortium for Advanced Communications Technology |
| OCAD | Operations Control Agreement Document |
| OCAMS | OSRISIS-REx Camera Suite |
| OCB | Operations Control Board |
| OCC | operational control centre |
| OCCS | onboard complex control system |
| OCD | Operations Concept Document |
| OCE | Office of the Chief Engineer |
| OCF | Operations Control Facilities |
| OCFO | Office of the Chief Financial Officer |
| OCFO | Office of Chief Financial Officer |
| OCHM | Operational Hazardous Control Matrix |
| OCHMO | Office of the Chief Health & Medical Officer |
| OCIO | Office of Chief Information Officer |
| OCIP | Operations Control Implementation Plan |
| OCM | Orbital Conjunction Message |
| OCN | Order Control Number |
| OCO | Orbiting Carbon Observatory |
| OCONUS | Outside the Continental United States |
| OCR | Operations Change Request |
| OCRD | operations customer requirements document |
| OCS | Orbit Control System (larger thrusters) |
| OCSD | Optical Communications & Sensor Demonstration |
| OCSE | Optical Calibration Sphere Experiment |
| OCSM | Organization Computer Security Manager |
| OCST | Office of Commercial Space Transportation |
| OCT | Office of the Chief Technologist |
| OCTL | Optical Communication Telescope Laboratory |
| OD | Orbit Determination |
| ODAC | Orion Design Analysis Cycle |
| ODAR | Obsolescence Driven Architecture Redesign |
| ODB | Operations Data Base |
| ODC | Other Direct Costs |
| ODE | one-dimensional equilibrium |
| ODERACS | Orbital Debris Radar Calibration Sphere |
| ODF | Operations Data File |
| ODF-CB | Operations Data File Control Board |
| ODFCB | ODF Control Board |
| ODFCR | Operations Data File Change Request |
| ODFDN | Operations Data File Discrepancy Note |
| ODFRV | Operations Data File Desktop Review & Validation System |
| ODIN | Outsourcing Desktop Initiative for NASA |
| ODIN | On-board Data & Information Network Officer |
| ODM | Operations Data Message |
| ODM | Orbit Data Message |
| ODM | Object Data Management |
| ODM | Orbiter Disconnect Mechanism |
| ODN | On-board Data Network |
| ODR | Operations Data Room |
| ODRC | Operational Data Reduction Complex |
| ODS | orbiter docking system |
| OE | Operational Engineer |
| OE/V | OSTP editor/viewer |
| OEDIPUS | Observation of Electric Field Distributions in the Ionospheric Plasma - a Unique Strategy |
| OEM | Original Equipment Manufacturer |
| OEM | Orbit Ephemeris Message |
| OEP | operations engineering plan |
| OEX-Target | Orbiter Experiment Target |
| OF | obscuration factor |
| OFA | operations feasibility assessment |
| OFK | Official Flight Kit |
| OFO | Orbiting Frog Otolith |
| OFP | Operational Flight Program |
| OFPP | Office of Federal Procurement Policy |
| OFT | On Board File Transfer |
| OFT | Orbital Flight Test |
| OFT | test,Orbital Flight Test |
| OFTP | Orbital Flight Technique Panel (Space Shuttle Program) |
| OFTS | orbital flight targeting system |
| OGC | Office of General Counsel |
| OGC | Office of the General Counsel |
| OGC | check MCC; on MCC go |
| OGCh | Orbital'noy Golovnoy Chasti |
| OGMS-SA | Outgassing Material Study by Spectroscopy Analysis |
| OGO | Orbiting Geophysical Observatory |
| OGRR | Operations Ground Rules &Requirements |
| OGS | Oxygen Generator System |
| OGSE | optical ground support equipment |
| OGV | Ogive Panel |
| OHA | operating hazard analysis |
| OHCM | Office of Human Capital Management |
| OHD | Overheating Detection |
| OI | Operational Improved (Transit) |
| OI | Office of Investigations |
| OICETS | Optical Inter-orbit Communication Engineering Test Satellite |
| OIG | Office of Inspector General |
| OIIR | Office of International Interagency Relations |
| OIIR | Office of International & Interagency Relations |
| OIM | Operations Integration Manager |
| OIP | Operations Interface Procedures |
| OIP | Operations Integration Plan |
| OIR | Operations Integration Review |
| OIS | Operational Intercommunications System |
| OIS-D | Operational Intercommunications System Digital |
| OIS-Q | Operational Intercommunications System Quintron |
| OIT | oxygen induction time |
| OITP | oxygen induction temperature |
| OJT | On-Job Trainee |
| OJT | On-the-Job Training |
| OKN | Optokinetic Nystagmus |
| OL | Outboard Lower |
| OL | Operations Lead |
| OLA | OSIRIS-REx Laser Altimeter |
| OLA | Office of Legislative Affairs |
| OLI | Operational Land Imager (Landsat Data Continuity Mission instrument) |
| OLIA | Office of Legislative and Intergovernmental Affairs |
| OLS | Operational Linescan System |
| OLSG | Optical Link Study Group |
| OLVBI | Orbiting Very Long Baseline Interferometry |
| OM | &DA Other Mission & Data Analysis |
| OMA | optical modulation amplitude |
| OMB | Office of Management & Budget |
| OMB | Office of Management and Budget |
| OMC | Operations Management Council |
| OMCF | Orbiter Maintenance Checkout Facility |
| OMCS | Operations Monitor and Control System |
| OMEGA | Offshore Membrane Enclosures for Growing Algae |
| OMERE | Radiation environment & effects code developed by TRAD with the support of CNES |
| OMG | Object Management Group |
| OMI | On-Orbit Maintenance Item |
| OMI | Ozone Monitoring Instrument |
| OMM | Orbital Maintenance Maneuvers |
| OMOTENASHI | Outstanding Moon exploration Technologies demonstrated by Nano Semi-Hard Impactor |
| OMP | Operations Management Plan |
| OMPS | Ozone Mapping & Profiler Suite (NPOESS Preparatory Project instrument) |
| OMRS | Operations Maintenance Requirements Set |
| OMS | Orbital Maneuvering System |
| OMS-E | Orbital Maneuvering System Engine |
| OMSA | Office of Mission Safety Assurance |
| OMT | Operations Management Team (name of the IGS/GS HW at ESTEC) |
| OMT | Operations Management Team |
| OMUX | output multiplexer |
| ONERA | Office National d'Études et de Recherches Aérospatiales |
| ONS | off-nominal situation |
| ONTO | Oxiden & Nitrogen Tanks (see also HPGT) |
| OO | Opal Oscar |
| OOB | Out-Of-Band |
| OOCI | OSTP/ODF crew interface |
| OODA | Observe, Orient, Decide, Act |
| OOL | Out of limit |
| OOLC | Out of Limit counter |
| OOM | on-orbit maintenance |
| OOS | On-Orbit Operations Summary |
| OP | operational plan |
| OPAL | Oxygen Photometry of the Atmospheric Limb |
| OPAL | Orbiting Picosat Automatic Launcher |
| OPD | Operations Processes Document |
| OPDCS | Operations Planning Data Collection System |
| OPEN | Open Prototype for Educational NanoSats |
| OPF | Orbiter Processing Facility |
| OPF | Orbital Processing Facility |
| OPI | Oral Proficiency Interview |
| OPII | Office of Program and Institutional Integration |
| OPM | Optimized Propellant Maneuver |
| OPM | maneuver,Optimized Propellant Maneuver |
| OPM | Office of Personnel Management |
| OPPS | Operations Preparation & Planning System |
| OPR | Office of Primary Responsibility |
| OPS | Operations |
| OPS | Orbitalnaya Pilotiruemaya Stanziya |
| OPS | LAN onboard operations local area network |
| OPS-HA | ATV Mission Operations Division |
| OPSPLAN | Operations Planner |
| OPSR | Operations Preparation Support Room |
| OPUSAT | Osaka Prefecture University Satellite |
| OPVR | Operations Preparation Validation Review |
| OPVR | Operations Preparation & Validation Review |
| OQPSK | offset quadrature phase shift keying |
| OQR | operational qualification review |
| ORAS | Orbiter Rotation Axis System |
| ORC | Operationally Restricted Commands |
| OREX | Orbital Reentry Experiment |
| ORFEUS | Orbiting & Retrievable Far & Extreme Ultraviolet Spectrometer |
| ORFEUS-SPAS | Orbiting & Retrievable Far & Extreme UV Spectrometer - Shuttle Palette Satellite |
| ORI | Operational Readiness Inspection |
| ORION | Orion ESM European Service Module |
| ORNL | Oak Ridge National Laboratory |
| ORR | Operational Readiness Review |
| ORR | Operations Readiness Review |
| ORS | Octahedral Research Satellite |
| ORS | Operationally Responsive Space |
| ORS | Tech Operationally Responsive Space - Technology |
| ORSES | Operationally Responsive Space Enabler Satellite |
| ORT | Operation Readiness Test |
| ORT | Operational Readiness Test |
| ORU | On-Board Replaceable Unit |
| ORU | Orbital Replacement Unit |
| ORU | Onboard Redundancy Unit |
| OS | Operating System |
| OS | Operation System |
| OS | Orbiting Sample |
| OSA | Orion Stage Adapter |
| OSAL | Operating System Abstraction Layer |
| OSB | Operations Steering Board |
| OSB | Operational Support Building |
| OSC | Orbital Sciences Corporation |
| OSCA | onboard spacesuit control assembly |
| OSCAR | Orbiting Satellite Carrying Amateur Radio |
| OSCAT | Indian Space Agency's scatterometer instrument |
| OSD | output serial digital |
| OSE | Orbital Support Equipment |
| OSE | on-orbit support equipment |
| OSHA | Occupational & Safety & Health Administration |
| OSHA | Occupational Safety and Health Administration |
| OSHA | Occupational Safety & Health Agency |
| OSI | Office of Strategic Infrastructure |
| OSI | Open Systems Interconnection |
| OSIP | Open Space Innovation Platform |
| OSIRIS-3U | Orbital Satellite for Investigating the Response of the Ionosphere to Stimulation & Space Weather - 3 Unit Cubesat |
| OSIRIS-REx | Origins-Spectral Interpretation-Resource Identification-Security-Regolith Explorer |
| OSL | Orbiting Solar Laboratory |
| OSMA | Office of Safety & Mission Assurance |
| OSMA | Office of Safety and Mission Assurance |
| OSNSAT | Open Space Network Satellite |
| OSO | Operations Support Officer |
| OSO | Orbiting Solar Observatory |
| OSP | Orbital / Suborbital Program (of the USAF) |
| OSP | Orbital Space Plane |
| OSPL | overall sound pressure level |
| OSR | Optical Solar Reflector |
| OSR | Operations Status Report |
| OSSA | Office of Space Science & Applications |
| OSSE | Oriented Scintillation Spectrometer Experiment (on CGRO) |
| OST | Operations Support Tools (Col-CC) |
| OST | Operations Support Tool |
| OSTC | on station thermal cycling |
| OSTM | Ocean Surface Topography from Space Missions |
| OSTM | Ocean Surface Topography Mission |
| OSTP | onboard short-term plan |
| OSTP | Office of Science & Technology Policy |
| OSTP | Onboard Short Term Plan |
| OSTPV | Onboard Short Term Plan Viewer |
| OSTST | Ocean Surface Topography Science Team |
| OSWG | Operations Safety Working Group |
| OT | Off-Topic |
| OT | Operational Tiros |
| OTA | Optical Telescope Assembly (on HST) |
| OTB | Orbital Test Bed |
| OTC | Outbound Trajectory Corrections |
| OTCM | ORU tool changeout mechanism |
| OTCM | ORU Tool Change-out Mechanism (SPDM) |
| OTD | ORU transfer device |
| OTE | Optical Telescope Element |
| OTES | OSIRIS-REx Thermal Emission Spectrometer |
| OTHB | Over The Horizon Backscatter |
| OTIS | Optical Telescope Element/ Integrated Science Module (JWST) |
| OTM | output transformation matrix |
| OTP | operations training plan |
| OTP | ORU/Tool Platform (SPDM) |
| OTR | ORU Temporary Platform |
| OTS | Orbital Test Satellite |
| OTV | Orbital Transfer Vehicle |
| OU | Outboard Upper |
| OUFTI | Orbital Utility For Telecommunications / Technology Innovations |
| OV | orbital vehicle |
| OV | Overview |
| OV | OrbView |
| OV | Orbiting Vehicle |
| OV | Orbiter Vehicle |
| OV | vehicle,orbital vehicle |
| OVDB | Operational Validation Data Base |
| OVEIWG | Orion Vehicle Engineering Integration Working Group |
| OVHD | Overhead |
| OVIRS | OSIRIS-REx Visible & Infrared Spectrometer |
| OVP | operational validation plan |
| OVT | Operations Validation Test |
| OVWST | Ocean Vector Winds Science Team |
| OW | Open Work |
| OWI | Operational Work Instruction |
| OWTL | Open Work Tracking Log |
| OXP | Orbcomm Experiment Platform |
| OZ | NASA Department responsible for ISS payload integration |
| Obs | observation |
| OpNom | Operations Nomenclature |
| Opr | operator |
| Ops-Sup | Operations Support |
| Opt | option |
| Orb | Orbiter |
| Orb | orbit |
| OrbView | Orbital View |
| Orbcomm | Orbital Communication |
| Orbis | Orbiting Radio Beacon Ionospheric Satellite |
| Orbiscal | Orbiting Radio Beacon Ionospheric Satellite Calibration |
| OreSat | Oregon Satellite |
| OrigamiSat | Organization of research Group on Advanced deployable Membrane structures for Innovative space science Satellite |
| Osc | oscilloscope |
| Outbd | outboard |
| Ovld | overload |
| Ovvolt,Ov V | overvoltage |
| Ox | oxidizer |
| P | Precision (P-code) |
| P | Probe |
| P | Project |
| P&F | Particles & Fields |
| P&R | place & route |
| P&S | pointing & support |
| P-AM | Pancreatic Amylase |
| P-E&OI | Payload Engineering & Operations Integration |
| P-REC | Received Power |
| P.L. | Public Law |
| P/AWS | Paging and Area Warning System |
| P/B | Playback |
| P/L | Payload |
| P/L Reg | Payload Regulation |
| P/L; PL | payload |
| P/N | part number |
| P/SDR | Program System Design Review |
| P/SRR | Program System Requirements Review |
| P2P | Point-To-Point |
| P2P | Program to Program |
| P2T2 | Prototype Part Task Trainer |
| P3I | Preplanned Program Improvement |
| P; Port | port |
| PA | Product Assurance |
| PA&E | Program Analysis And Evaluation |
| PA&S | Product Assurance & Safety |
| PA/S | Product Assurance & Safety |
| PAA | phased array antenna |
| PAA | PDGF Adapter Assembly |
| PAA | Program Alignment & Analysis |
| PABX | Private Automated Branch Exchange |
| PAC | Package Attitude Control |
| PAC | Partial Solar Calibrator |
| PACE | Pre-Aerosols, Carbon & Ecosystems |
| PACE | University of Pittsburg Airglow Ion Chemistry Experiment |
| PACE | Plankton, Aerosol, Cloud & ocean Ecosystem |
| PACE | Platform for Attitude Control Experiments |
| PACOR | Packet Processor |
| PACOR-A | Packet Processor Automation |
| PACSAT | Packet Radio Satellite |
| PACT | power augmented catalytic thruster |
| PAD | Program Approval Document |
| PAD | Packet Assembler/Disassembler |
| PAD | part approval document |
| PAD | pad control word |
| PAD | part approval documents |
| PAD | Project Authorization Document |
| PAET | Planetary Athmosphere Entry Test |
| PAF | product assurance file |
| PAGEOS | Passive Geodetic Earth Orbiting Satellite |
| PAI | Payload Analytical Integration |
| PAIG | Program and Institutional Guidance |
| PAL | Phase Alternating Line |
| PALI | Payload Accommodation Locker Indicator |
| PAM | pulse amplitude modulation |
| PAM | Payload Assist Module |
| PAM | Payload Attach Mechanism (EF) |
| PAM-D | Payload Assist Module, Delta-class |
| PAMS-STU | Passive Aerodynamically Stabilized Magnetically Damped Satellite - Satellite Test Unit |
| PAMWG | Performance Assessment Metrics Working Group |
| PAN | Pathfinder for Autonomous Navigation |
| PAN | Palladium At Night |
| PANSAT | Petite Amateur Navy Satellite |
| PAO | Public Affairs Office |
| PAO | Public Affairs Office (NASA PR) |
| PAO | Public Affairs Opportunity |
| PAO | Public Affair Officer |
| PAP | Product Assurance & Safety Plan |
| PAPAC | Provide Aerospace Products and Capabilities |
| PAPOS | Payload Parking Position Interface |
| PAR | Program Acceptance Review |
| PAR | Performance & Accountability Report |
| PAR | Performance and Accountability Report |
| PAR | Performance Accountability Report |
| PARASOL | Polarization & Anisotropy of Reflectances for Atmospheric Science coupled with Observations from a LIDAR |
| PARD | Product Assurance & Safety Requirements for Phases |
| PARS | Playback Anomaly Recovery System |
| PART | Program Assessment Rating Tool |
| PARTNeR | Proyecto Academico con el Radiotelescopio de NASA en Robledo (Spanish equivalent of GAVRT) |
| PARX | Pulsating Aurora Rocke Experiment |
| PAS | payload attachment system |
| PAS | Pan Am Satellite |
| PASI | Philippine Agila Satellite Inc. |
| PASO | Product Assurance & Safety Officer |
| PASS | Primary Avionics Software System |
| PAT | Paroxysmal Atrial Tachycardia |
| PAT | Pre-flight Adaptive training |
| PAV | Progress Assistance Visit |
| PAYCOM | Payload Communicator |
| PB | President’s Budget |
| PB-HME | Programme Board – Human Spaceflight Microgravity & Exploration |
| PB-HME | Human Spaceflight, Microgravity & Exploration Programme Board |
| PBA | Portable Breathing Assembly |
| PBA | portable breathing apparatus |
| PBA | Pump Bypass Assembly |
| PBIT | Periodic BIT |
| PBMA | Process Based Mission Assurance |
| PBR | President’s Budget Request |
| PBS | Public Broadcasting Service |
| PBS | President’s Budget Submit |
| PBX | Post Base Exchange |
| PC | portable computer |
| PC | Plane Change |
| PC | Personal Computer |
| PCA | Physicians’ comparability allowance |
| PCA | Program Commitment Agreement |
| PCAD | Propulsion Cryogenics Advanced Development |
| PCAM | Panoramic Camera |
| PCAP | payload crew activity plan |
| PCAR | Payload Complement Acceptance Review |
| PCASS | Program Compliance Assurance and Status System |
| PCB | Program Control Board |
| PCB | printed circuit board |
| PCB | parts control board |
| PCB | product configuration baseline |
| PCB | Polychlorinated Biphenyl |
| PCBA | portable clinical blood analyzer |
| PCBM | passive CBM |
| PCBs | Polychlorinated biphenyls |
| PCC | Processing Control Center |
| PCC | pressurized cargo carrier |
| PCC | Permanent Consultative Committee |
| PCCA | Principal Center for Communications Architecture |
| PCCB | Program Change Control Board |
| PCCM | Project Configuration Control Management |
| PCCS | Physical Configuration Control System |
| PCCU | Power Conditioning & Control Unit (APAS) |
| PCD | Project Commitment Document |
| PCD | Process Control Document |
| PCD | Product Configuration Documentation |
| PCDF | PU PCDF Processing Unit |
| PCDF | EU PCDF Experiment Unit |
| PCDF | Protein Crystallization Diagnostics Facility |
| PCDU | power control & distribution unit |
| PCDU | power conditioning & distribution unit |
| PCE | Proximity Communication Equipment |
| PCE | Project Communications Engineers |
| PCEM | Payload Computer & Electronic Module |
| PCF | Protocol Control Frame |
| PCFC | Proposed Change from Control |
| PCFS | Personal Computer Field System |
| PCG | protein crystal growth |
| PCI | Product Configuration Items |
| PCIR | Payload Complement Integration Review |
| PCM | Process Control Module |
| PCM | Program Control Manager |
| PCM | pulse coded modulation |
| PCM | phase change material |
| PCM | pulse code modulation |
| PCM | process control monitor |
| PCN | Page Change Notice |
| PCN | Procurement Control Number |
| PCN | process change notice |
| PCOS | Physics of the Cosmos |
| PCR | Payload Changeout Room |
| PCR | product conformance report |
| PCR | Polymerase chain reaction |
| PCS | Portable Computer System |
| PCS | Personal Communication Service |
| PCS | Physics of Colloids in Space |
| PCSR | Payload Complement Safety Review |
| PCSat | Prototype Communication Satellite |
| PCT | post contact thrusting |
| PCU | plasma contactor unit |
| PCV | Progress cargo vehicle |
| PCV | Packed cell volume,hematocrit |
| PCV | physical configuration verification |
| PCVP | Pump & Control Valve Package |
| PCWS | pressure alarm sensor |
| PD | Program Directive |
| PD | Position Description |
| PD | payload developer |
| PD | Processed Data |
| PDA | Portable Diagnostic Analyzer |
| PDA | power distribution assembly |
| PDA | Personal Digital Assistant |
| PDA | Payload Disconnect Assembly |
| PDAC | Procedures Development and Control |
| PDAC | procedures development & control |
| PDAM | Power Management & Distribution |
| PDAM | maneuver,pre-determined DAM |
| PDAM | Pre-determined DAM |
| PDB | Project Data Base |
| PDC | Payload Development Capability |
| PDC | Payload Data Center |
| PDD | Presidential Decision Directive |
| PDD | Payload Deployment Device |
| PDD | PPL Description Document |
| PDDS | Procedure Development Support Software |
| PDE | performance drift error |
| PDEP | Process for Disposal of ESA Property |
| portable document format | |
| Portable Date File format | |
| Programmable Data Formatter | |
| probability density function | |
| PDG | Payload Data Generator |
| PDGF | Power Data Grasp Fixture or grasp fixture |
| PDGF | power & data grapple fixture |
| PDL | Ponce De Leon (STDN Station) |
| PDL | Payload Data Library |
| PDL | Procedure Distribution List |
| PDM | Program Decision Memorandum |
| PDM | precedence diagram method |
| PDMS | Product Data Management System |
| PDN | Public Data Network |
| PDO | process data object |
| PDOP | Position Dilution Of Precision |
| PDOT | Payload Development & Operations Team |
| PDP | Personal Data Protection |
| PDP | Plasma Diagnostics Package |
| PDR | Preliminary Design Review |
| PDRS | PDRS engineer |
| PDS | Payload Data Set |
| PDS | Planetary Data System |
| PDSS | Payload Data Service System |
| PDSS | Payload Data Services System |
| PDSS | Payload Data Services System (HOSC) |
| PDT | Peripheral Docking Target |
| PDT | Procurement Development Team |
| PDTA | Power and Data Transfer Assembly |
| PDU | Power Distribution Unit |
| PDWG | Processed Data Working Group |
| PE | Program Executive |
| PE&OI | Payload Engineering & Operations Integration |
| PEA | Pulseless Electrical Activity |
| PEA | Pressure Equalization Assembly |
| PEARL | Payload & Experiment Assignment Responsibility List |
| PEASSS | Piezo Electric Assisted Smart Satellite Structure |
| PEB | Performance Evaluation Board |
| PEC | Passive Experiment Carrier (MISSE) |
| PEC | Performance Evaluation Committee |
| PECL | pseudo-ECL |
| PED | pressure equipment directive |
| PED | plastic encapsulated device |
| PED | positive expulsion device |
| PEEK | polyetheretherketone |
| PEF | price escalation formula |
| PEHB | payload Ethernet hub/bridge |
| PEHG | payload Ethernet hub gateway |
| PEI | Payload Engineering Integration |
| PEL | Power Equipment List |
| PEM | Payload Engineering Manager |
| PEMS | Percutaneous Electrical Muscle Stimular |
| PEO | polar Earth orbit |
| PEP | Power Equipment Panel |
| PEPE | Plasma Experiment for Planetary Exploration |
| PERS | Payload Equipment Restraint System |
| PES | Payload Engineering Support Facility (Friedrichshafen) |
| PES | Pallet Ejection System |
| PEST | Plasma Experiment Satellite Test |
| PET | polyethylene terephthalate |
| PEV | Post Event [RGS] Visibility |
| PEV | pressure equalization valve |
| PF | Processing Facility |
| PF | parabolic flight |
| PFA | Perfluoral oxide Copolymer |
| PFA | perfluoroalkoxy |
| PFC | Parabolic Flight Campaign |
| PFC | pump & flow control |
| PFC | Private Family Conference |
| PFCI | potential fracture-critical item |
| PFCI | potential fracture critical item |
| PFCIL | potential fracture-critical items list |
| PFCS | pump & flow control subassembly |
| PFD | power flux density |
| PFE | Periodic Fitness Evaluation |
| PFE | Portable Fire Extinguisher System |
| PFE | portable fire extinguisher |
| PFF | Pluto Fast Flyby |
| PFM | pulse frequency modulation |
| PFMC | Pump/Fan Motor Controller |
| PFMI | Pore Formation and Mobility Investigation |
| PFO | particle fall out |
| PFOTS | Poker Flats Research Range Orbital Tracking Station |
| PFP | Program Financial Plan |
| PFR | Post Flight Report |
| PFR | Post Flight Review |
| PFR2 | Post Flight Review 2 board |
| PFRR | Poker Flats Research Range |
| PFS | Particles & Field Subsatellite |
| PFS | Pulmonary Function System |
| PFS | Poker Flat Station |
| PFT | pulmonary function test |
| PG | Product Groups |
| PG | Procedural Guideline |
| PGBA | Plant Generic Bioprocessing Apporatus |
| PGOC | Payload Ground Operations Contract |
| PGP | Pretty Good Protection |
| PGS | Product Generation System |
| PGSE | pressure ground support equipment |
| PGW | Propylene/Glycol Water (heat transfer fluid) |
| PH | Momentum vector |
| PH | pressurized hardware |
| PHA | preliminary hazard analysis |
| PHA | Personal Hygiene Articles |
| PHALCON | Power Articulation Lighting & Control Officer |
| PHASR | Personal Hazards Associated with Space Radiation |
| PHAZE | Physics of Auroral Zone Electrons |
| PHEG | Payload Hub Ethernet Gateway |
| PHP | passive hearing protection |
| PHS | Periodic health Status |
| PHS&T | Packing, Handling, Storage & Transportation |
| PHSF | Payload Hazardous Servicing Facility |
| PHW | Program Hours Worked |
| PI | Principal Investigator |
| PI | prime investigation |
| PI/TL | Principal Investigator/Team Leader |
| PIA | Payload Integration Agreement |
| PIA | port inboard aft |
| PIAU | Payload Interface Adapter Unit |
| PIC | particle in cell |
| PICASSO | PICosatellite for Atmospheric & Space Science Observations |
| PICASSO-CENA | Pathfinder Instrument for Cloud & Aerosol Spaceborne Obeservation - Climatologie Etendue des Nuages et des Aerosols |
| PICOSat | Polymer Battery Experiment / Ionospheric Occulation Experiment / Coherent Electro Magnetic Radio Tomography / Optical Precision Platform Experiment - Satellite |
| PICS | Partnerships, Innovation & Commercial Space |
| PICS | Passive Inspection CubeSat |
| PID | process identification document |
| PIDS | Prime Item Document Specification |
| PIER | Post Increment Evaluation Report |
| PIF | port inboard forward |
| PIM | Plasma Interaction Model |
| PIM | Payload Intregration Manager |
| PIM | Program Integration Manager |
| PIM | Payload Integration Manager |
| PIMC | Program/Institutional Management Council |
| PIMP | passive intermodulation product |
| PIMS | Payload Information Management System |
| PIMS | Photoionisation Mass Spectrometer |
| PIMS | principal investigator microgravity services |
| PIN | Personal Identification Number |
| PIN | p-type semiconductor, intrinsic semiconductor, n type semiconductor |
| PIN | Product Identification Number |
| PIND | particle impact noise detection |
| PIO | Program Integration Office (JSC) |
| PIO | Program Integration Office |
| PIO | Public Information Office |
| PIP | Premium Internet Protocol |
| PIP | Process Improvement Project |
| PIP | Payload Interface Processor |
| PIP | payload integration plan |
| PIR | Partner Interface Rack |
| PIR | Program Implementation Review |
| PIRATE | Payload Imagery Requirements & Transit Evaluation |
| PIRD | Preliminary Interface Requirement Document |
| PIRN | Preliminary Interface Revision Notice |
| PIRN | Proposed Interface Revision Notice |
| PISat | PESIT Imaging Satellite |
| PIT | Payload Integration Team |
| PITL | Processor In The Loop |
| PIU | Payload Interface Unit (JLE) |
| PIU | payload interface unit |
| PIUV | Parallel Input Undervoltage Protection |
| PIV | Personal Identification Verification |
| PIX | Plasma Interaction Experiment |
| PIXIE | particle-induce X-ray emission |
| PJ | Pararescue Jumper |
| PKI | Public Key Infrastructure |
| PL | Postlanding |
| PL | Payload |
| PL MDM | Payload Multiplexer/Demultiplexer |
| PLA | PayLoad Adapter |
| PLAR | Post Launch Assessment Review |
| PLATO | Planetary Transits & Oscillations of stars |
| PLB | payload bay |
| PLC | Postlanding Communications |
| PLC | Programmable Logic Control |
| PLCC | plastic leaded chip carrier |
| PLCU | Payload Control Unit |
| PLD | Payload |
| PLG | Payloads Group |
| PLG | Payload Group |
| PLI | Propellant Liner Insulation |
| PLL | phase-locked loop |
| PLL | phase locked loop |
| PLOP | Physical Layer Operations Procedure |
| PLOP | physical layer operation procedure |
| PLR | Parasitic Load Radiator |
| PLS | Proximity Link System (HTV) |
| PLSS | personal life support system |
| PLSS | Portable Life Support System |
| PLT | Payload Laptop Terminal (JEM) |
| PLUTO | Plug-in-Port Utilization Officer |
| PM | Phase Modulation |
| PM | propulsion module |
| PM | Pressurized Module |
| PM | preventive maintenance |
| PM | Pump Module |
| PM | Program Manager |
| PM&P | parts materials & processes |
| PMA | Pressurised Mating Adaptor |
| PMA | President's Management Agenda |
| PMA | pressurized mating adapter |
| PMA | President’s Management Agenda |
| PMAC | payment milestone achievement certificate |
| PMAD | power management & distribution |
| PMB | Program Management Budget |
| PMB | Performance Measurement Baseline |
| PMB | Program Management Board |
| PMC | Permanently Manned Capability |
| PMC | Private medical conference |
| PMC | Private Mediacl Conference |
| PMC | Program Management Council |
| PMCA | Power Management and Control Application |
| PMCA | Photovoltaic Control Application |
| PMCA | Power Management Control Application |
| PMCF | product manufacturing & control file |
| PMCU | Power Management and Control Unit |
| PMCU | Panoramic Modular Camera Unit |
| PMD | propellant management device |
| PMD | permanent molecular deposition |
| PMEL | Precision Measuring Equipment Laboratory |
| PMG | Plasma Motor Generator |
| PMIC | Payload Mission Integration Contract |
| PMIRR | Pressure Modulated InfraRed Radiometer (on Mars Observer) |
| PML | Phoenix Mars Lander |
| PMM | Permanent Multipurpose Module |
| PMM | Program Management Metrics |
| PMON | parameter monitoring |
| PMOS | P-channel metal oxide semiconductor |
| PMP | Program Management Plan |
| PMP | Point-to-Multipoint |
| PMP | parts, materials & processes |
| PMP | parts, materials, processes |
| PMP | parts, materials, process |
| PMP | project management plan |
| PMP | Payload Mounting Panel |
| PMR | Program Management Review |
| PMR | Payload Management Review |
| PMR | Payloads Mission Readiness |
| PMR#13 | Payload Manager Review number 13 |
| PMS | Performance Measurement System |
| PMSR | Project Management Status Report |
| PMT | PhotoMultiplier Tube |
| PMT | Program Management Tool |
| PN | Pseudo-Random Noise |
| PN | probability (of occurrence) number |
| PNAR | Preliminary Non-Advocate Review |
| PNCF | Probability of No Catastrophic Failure |
| PNO | Public Network Operator |
| PNP | Preliminary Network Plan |
| PNP | bipolar junction transistor with N-type base |
| PNPN | deliberate or parasitic thyristor-like semiconductor structure (containing four, alternating P-type & N-type regions) |
| PNT | Positioning, Navigation, and Timing |
| PNT | Positioning, Navigation, & Timing |
| PO | Purchase Order |
| PO | Payload Operations |
| PO | Portugese Oscar |
| PO | Pansat Oscar |
| PO/CP | Engineering Change Request / Change Proposal |
| POA | Payload ORU Accommodation (MBS) |
| POA | port outboard aft |
| POA | payload/ORU accommodation |
| POC | Point Of Contact |
| POC | Payload Ops Center |
| POCB | Payload Operations Control Board |
| POCC | Project Operations Control Center (GSFC, JSC, MSFC) |
| POCC | Payload Operations Control Center (JPL) |
| POCC | Payload Operations Coordination Center |
| POCS | Photo Optical Control System |
| POD | Payload Operations Director |
| PODF | Payload Operations Data File |
| PODSAT | Payload Orbital Delivery Satellite |
| POEMS | Prime Operated Enhanced Management System |
| POF | port outboard forward |
| POGO | Polar Orbiting Geophysical Observatory |
| POGS & SSR | Polar Orbiting Geomagnetic Survey & Solid State Recorder |
| POH | NASA Payload Operations Handbook |
| POIC | Payload Operations Integration Center |
| POIC | Payload Operations & Integration Center |
| POIF | payload operations & integration function |
| POIP | Payload Operations Integration Plan |
| POIS | PSCNI Online Information Service |
| POLAR | Polar Plasma Laboratory |
| POM | polyoxymethylene |
| POMB | Plant Operations Maintenance Branch |
| PONSFD | Proximity Operations Nano-Satellite Flight Demonstration |
| POO | Plumes Of Opportunity |
| POP | Program Operating Plan |
| POP | Period of Performance |
| POP | payload operations plan |
| POPACS | Polar Orbiting Passive Atmospheric Calibration Sphere |
| POR | Program Operating Room |
| POS | Position Hold |
| POSAR | Payload Operations Status Analysis Review |
| POST | power-on self-test |
| POWER | Protecting Our Workers & Ensuring Reemployment Presidential Initiative |
| POWG | Payload Operations Working Group |
| PP | Program Plan |
| PP | Processed Parameter |
| PP | Planning Package |
| PP | planning period |
| PP&C | Program Planning & Control |
| PPA | pump package assembly |
| PPA | Pollution Prevention Act |
| PPAA | planetary protection approval authority |
| PPAC | parallel plate avalanche counter |
| PPBE | Planning, Programming, Budgeting, & Execution |
| PPBE | Planning, Programming, Budgeting, and Execution |
| PPC | Private Psychological Conference |
| PPCR | Planning Product Change Request |
| PPD | Purified Protein Derivative (test) |
| PPDA | Primary Power Distribution Assembly |
| PPE | Personal Protective Equipment |
| PPE | Personal Preference Electronics |
| PPF | Payload Processing Facilities |
| PPFS | Portable Pulmonary Function System |
| PPK | Personal Preference Kit |
| PPL | Pre-Programmed/Pre-Position Load |
| PPL | load,Pre-Programmed/Pre-Position Load |
| PPL | Pre-Positioned Load |
| PPM | Positions & Proper Motions (catalog) |
| PPM | Program Performance Metrics |
| PPMS | Petal Position Measurement System |
| PPP | Point-to-Point Proximity |
| PPR | Program Planning Review |
| PPRA | Positive Pressure Relief Assembly |
| PPS | Packet Processing System |
| PPS | Payload Planning System (MSFC) |
| PPS | Precise Positioning System |
| PPS | Precipitation Processing System |
| PPSB | Payload Power Switching Box |
| PPT | pulsed plasma thruster |
| PQM | propulsion qualification model |
| PR | Public Relations |
| PR | Planning Request |
| PR | Project Requirements |
| PR | Precipitation Radar |
| PRA | Probabilistic Risk Assessment |
| PRA | Probabilistic Risk Analysis |
| PRA | Project Reporting Attribute |
| PRACA | Problem Report & Corrective Action |
| PRACA | Problem Reporting and Corrective Action |
| PRB | Peer Review Board |
| PRBS | pseudo-random bit sequence |
| PRCB | Program Requirements Control Board |
| PRCU | Payload Rack Control Unit |
| PRD | device,payload retention d. |
| PRD | Resources Planning Division (OCFO) |
| PRD | project requirements document |
| PRD | project requirements documents |
| PRD | Program Requirements Document |
| PRE | performance reproducibility error |
| PREFIRE | Polar Radiant Energy in the Far Infrared Experiment |
| PREMIER | Programme de Retour d'Echantillons Martiens et Installation d'Expériences en Réseau |
| PRG | Program and Resources Guidance |
| PRG | Program Requirements Guidance |
| PRG | Progress |
| PRG | Program Requirement Guidelines |
| PRI | Primary Rate Interface |
| PRI&BRI | Primary and Basic Rate Interface |
| PRIME | Precision Recovery Including Maneuvering Entry |
| PRISM | Picosatellite for Remote-sensing & Innovative Space Missions |
| PRISMA | Prototype Research Instruments & Space Mission technology Advancement |
| PRLA | payload retention latch actuators |
| PRM | Perigee Raising Manoeuvre |
| PRMD | Private Management Domain |
| PRN | Post-rotational Nystagmus |
| PRNU | photo response non-uniformity |
| PRO | Payload Rack Officer |
| PRO | Primary Responsible Office (or Office of primary responsibility) |
| PROBA | Project for On-Board Autonomy |
| PROCYON | Proximate Object Close flyby with Optical Navigation |
| PRODEX | PROgramme de Développement d'Expériences scientifiques |
| PROM | programmable read-only memory |
| PROM | programmable read only memory |
| PROP | Propulsion engineer |
| PROX | proximity operations |
| PROX | Proximity communication system (ISS) |
| PROXI | Proximity |
| PRP | Personal Radiation Protection |
| PRR | preliminary requirements review |
| PRR | preliminary requirement review |
| PRS | Personal Rescue Sphere |
| PRS | P?rsonal Rescue Sphere |
| PRS | PORTS Refurbishment System |
| PRT | Perimeter Reflector Target |
| PR_CuNaR | PPerto Rico CubeSat NanoRocks |
| PRoFILE | Passive Radio Frequency Interference Location Experiment |
| PS | Payload Specialist |
| PS | Planning Set |
| PS | pressurized section |
| PS | Prostreishiy Sputnik |
| PSA | Part stress analysis |
| PSA | Pre-sleep and Post-sleep Activities |
| PSBR | Proton Spectrometer Belt Research |
| PSC | Program Support Communications |
| PSC | Policy and Strategic Communications |
| PSC | Polar Stratospheric Cloud |
| PSCN | Program Support Communications Network |
| PSCNI | PSCN Internet |
| PSCRD | Program Support Communications Requirements Document |
| PSCS | Personal Suit Cooling System |
| PSD | power spectral density |
| PSE | Programmable Serializer Equipment |
| PSE | Program Systems Engineering |
| PSELFEXT | Power Sum Equal Level Far-End Cross-Talk |
| PSF | Point Spread Function |
| PSHS | Public Safety and Homeland Security Bureau |
| PSK | phase shift keying |
| PSL | Propulsion Systems Laboratory |
| PSLA | Project Service Level Agreement |
| PSM | Power Slice Module |
| PSM | Procurement Strategy Meeting |
| PSM | Payload Software Manager |
| PSNEXT | Power Sum Near End Cross-Talk |
| PSP | Program Support Plan |
| PSP | Parker Solar Probe |
| PSR | Program Status Review |
| PSR | Physical Sciences Research |
| PSR | PulSaR |
| PSRP | Payload Safety Review Panel |
| PSS | Platform System Services |
| PSS | Portable Spacecraft Simulator (GSFC) |
| PSS | procedure standard specification |
| PSS | Packet Switching System (MSFC) |
| PSSO | Project System Security Officer |
| PSSO | Programme/Project & Site Security Officer |
| PSSO | Programme & Site Security Officer |
| PSTAR | stopping power & range tables for protons |
| PSTN | Public Switched Telephone Network |
| PSU | Power Supply Board |
| PSU | power switching unit |
| PT | product tree |
| PT | performance test |
| PTA | Portable TDRSS Antenna |
| PTC | Payload Training Capability |
| PTC | parameter type code |
| PTC | packet field type code |
| PTC | Pacific Telecommunication Council |
| PTCS | passive thermal control system |
| PTCSC | Passive ITCS Control |
| PTD | Pathfinder Technology Demonstrator |
| PTDR | Payload Training Dry Run |
| PTFE | polytetrafluoroethylene |
| PTFE | polytetrafluroethylene |
| PTFE | polytetrafluorethylene |
| PTH | plated-through hole |
| PTH | plated through hole |
| PTH | power transfer harness |
| PTH | platedthrough hole |
| PTLS | Persistent TT&C using LEO Satcom |
| PTP | Programmable Telemetry Processor |
| PTP | Payload Tactical Plan |
| PTR | post test review |
| PTR | Port Thermal Radiator |
| PTT | Part Task Trainer |
| PTT | push-to-talk button |
| PTT | Push to Talk |
| PTT | Postal Telegraph and Telephone |
| PTU | pan-tilt unit |
| PTV | Pre-Transmission Verification |
| PU | panel unit |
| PUC | Power Utilities Commission |
| PUL | portable utility light |
| PULSAUR | Pulsating Aurora |
| PUM | product user manual |
| PUMP | Project Utilization Management Position |
| PUMP | Pump Package |
| PUMPS | Pump Sensors |
| PUNCH | Polarimeter to Unify the Corona & Heliosphere |
| PUP | Partner Utilization Plan |
| PUR | Purple |
| PUS | Packet Utilisation Standard |
| PV | Photovoltaic |
| PV | Procedure Verification |
| PVA | photovoltaic array |
| PVC | Premature Ventricular Contraction |
| PVC | Permanent Virtual Circuit |
| PVC | Permanent Virtual Circuits |
| PVCS | Polytron Version Control System |
| PVCU | photovoltaic control unit |
| PVD | physical vapour deposition |
| PVDF | polyvinylidene fluoride (Kynar) |
| PVF | polyvinyl fluoride |
| PVL | Product Verification List |
| PVM | Pioneer Venus Multiprobe |
| PVM | photovoltaic module |
| PVO | Pioneer Venus Orbiter |
| PVP | Payload Verification Plan |
| PVR | photovoltaic radiator |
| PVT | pressure-volume-temperature |
| PVT | Position,Velocity,Time (state vector format) |
| PVTCS | photovoltaic thermal control system |
| PW | positive window |
| PWC | Price Waterhouse Coopers |
| PWC | Physical Work (Performance) Capacity |
| PWD | Potable Water Dispenser |
| PWM | pulse-width modulation |
| PWM | pulse-width modulator |
| PWP | portable work platform |
| PWR | Pratt & Whitney Rocketdyne |
| PWR | Payload Water Reservoir |
| PWS | Portable Workstation |
| PYRO | Pyrotechnic |
| PaCTS | Payload Computer Test System File |
| Pan-STARRS | USAF Panoramic Survey Telescope & Rapid Reporting System |
| Param | parameter |
| PasComSat | Passive Communication Satellite |
| Pegsat | Pegasus Satellite |
| Peole | Preliminaire Eole |
| PetitSat | Plasma Enhancements in The Ionosphere-Thermosphere Satellite |
| Ph | phase |
| PjM | Project Manager |
| Pkg | package |
| Pmax | maximum power |
| Pneum | pneumatic |
| Polar | Polar Auroral Plasma Physics Spacecraft |
| Polar-Bear | Polar Beacon Experiment & Auroral Research |
| Portcomm | Portable Communications |
| Posat | Portugese Satellite |
| Posn; pos | position |
| Ppk | process performance index |
| Ppm | Parts Per Million |
| PrISMS | Program Information Systems Mission Services |
| Pre-JORR | Preliminary Joint Operation Readiness Review |
| Prep | prepare,preparation |
| Preparatory | Project or NPP |
| Press,P | pressure |
| Pri,Prim | primary |
| ProSEDS | Propulsive Small Expendable Deployer System |
| Proc | procedure |
| Procedure | Development Support Software |
| Project | instrument) |
| Proof cell | Proof Pressure Cell |
| Pt | point |
| PtP | Progress to Plan |
| Pwr | power |
| Pwrup | powerup |
| Pyro | pyrotechnics |
| Q | Quarter |
| Q-DNRZ | quaternary differential NRZ |
| QA | Quality Assurance |
| QAR | Qualification Acceptance Review |
| QARMAN | QubeSat for Aerothermodynamic Research & Measurements on Ablation |
| QBSD | full quadrant back scatter electron detector |
| QCI | quality conformance inspection |
| QCM | quartz crystal monitor |
| QCM | quartz crystal microbalance |
| QD | Quick Disconnect |
| QD | disconnect,Quick Disconnect |
| QD | Quick Disconnect (non-sealing) |
| QDM | Quick Don Mask |
| QFN | quad flat pack no leads |
| QFP | quad flat pack |
| QL | qualification test load |
| QM | qualification model |
| QM | Quality Manual |
| QML | qualified manufacturer list |
| QML | qualified manufacturers list |
| QMS | Quality Management System |
| QPI | Quality Performance Index |
| QPL | qualified parts list |
| QPL | qualified product list |
| QPMR | Quarterly Program Management Review |
| QPSK | Quadrature Phase Shift Key |
| QPSK | quadrature phase shift keying |
| QQW | Qi Qui Weixing |
| QR | qualification review |
| QRA | Quantitative Risk Assessment |
| QRR | qualification review report |
| QSA | Qualification Site Approval |
| QSAT-EOS | Kyushu Satellite for Earth Observation System Demonstration |
| QSL | qualification status list |
| QSO | Quasi-Stellar Object |
| QSS | Quantum Science Satellite |
| QTP | qualification test plan |
| QTR | Quarter |
| QUESS | Quantum Experiments at Space Scale |
| QUIKSCAT | Quick Scatterometer |
| QZSS | Quasi-Zenith Satellite System |
| Qmax | maximum heat transport capability |
| QoS | Quality of Service |
| Qty | quantity |
| QuARCS | Quad Amateur Radio Communications Satellite |
| QuikSCAT | Quick SCATerometer |
| QuikTOMS | Quick Total Ozone Mapping Spectrometer |
| R | Roll |
| R | roentgen |
| R | ratio of the minimum stress to maximum stress |
| R | sunspot number |
| R | redundant |
| R&A | Research & Analysis |
| R&AD | Research and Advanced Development |
| R&D | Research and Development |
| R&D | Research & Development |
| R&D | R&D thrusters |
| R&MA | Restraint & Mobility Aid |
| R&R | Repair & Recovery |
| R&TTE | radio & telecommunications terminal equipment |
| R-S | receive-send |
| R-Z | DDS Rover Zone |
| R/A | return air |
| R/D | receiver/demodulator |
| R/F | refrigerator/freezer |
| R/T | Real Time |
| R/Y/G | Red/Yellow/Green |
| R2 | Robonaut 2 |
| R2A | A low nutrient bacterial medium with agar |
| RA | Radar Altimeter |
| RA | Right Ascension |
| RA | ascension,right ascension |
| RAB | Registration Accreditation Board |
| RAC | Request for Attitude Change |
| RAC | Remote Access Computer |
| RACE | Radiometer Atmospheric CubeSat Experiment |
| RACE | Rocket Auroral Correlator Experiment |
| RAD | Radiation |
| RADAR | RAdio Detection & Ranging |
| RADARSAT | Radar Satellite |
| RADLAT | radiation lot acceptance test |
| RADOSE | Radiation Dosimeter Experiment |
| RAE | Radio Astronomy Explorer |
| RAF | Return All Frames |
| RAID | Reports and Information Distribution |
| RAID | Redundant Array of Independent Disks |
| RAIDS | Remote Atmospheric and Ionospheric Detection System (HREP) |
| RAIF | Research Aircraft Integration Facility |
| RAIU | Russian audio interface unit |
| RAM | Responsibility Assignment Matrix |
| RAM | random access memory |
| RAM | Radio Attenuation Measurement |
| RAM | radiation area monitor |
| RAMPART | Rapidprototyped Mems Propulsion & Radiation Test |
| RAMS | reliability, availability, maintainability & safety |
| RAMS | reliability, availability, maintenance & safety |
| RAMS | reliability, availability, maintainability, safety |
| RANGE | Ranging & Nanosatellite Guidance Experiment |
| RAP | Robotics Alliance Project |
| RAPIS | Rapid Innovative Payload Demonstration Satellite |
| RAPTR | Remote Advanced Payload Test Rig (NASA) |
| RAR | risk assessment report |
| RAS | Royal Astronomical Society |
| RASC | Royal Astronomical Society of Canada |
| RASCOM | Regional African Satellite Communication |
| RASM | Remote Access Scheduling Mailbox |
| RATE | Radiant Teak |
| RAU | Remote Actuator Unit |
| RAVAN | Radiometer Assessment using Vertically Aligned Nanotubes |
| RB | requirements baseline |
| RBAM | Risk-Based Acquisition Management |
| RBD | reliability block diagram |
| RBE | relative biological effectiveness |
| RBG | Robotics Group |
| RBI | remote bus isolator |
| RBLE | Radiation Belt Loss Experiment |
| RBLL | Radiator Beam Launch Lock |
| RBSP | Radiation Belt Storm Probes |
| RBSPICE | Radiation Belt Science of Protons, Ions, Composition, & Electrons |
| RC | rigidity Cut-off for geomagnetic shielding |
| RC | resistor-capacitor |
| RCAR | Requirements Change Assessment Report |
| RCB | Risk Control Board |
| RCCA | Root Cause Corrective Action |
| RCCB | Reconfiguration Change Control Board |
| RCDR; Rcdr | recorder |
| RCF | Return Channel Frame |
| RCI | Rodent Cage Interface (for SLS mission) |
| RCI | Remote Control Interface |
| RCM | RGA Control & Monitor |
| RCM | Reliability Centered Maintenance |
| RCRA | Resource Conservation and Recovery Act |
| RCS | Radio Conference Sector/Subcommittee |
| RCS | Radar Cross Section |
| RCS | Reaction Control System |
| RCT | Rover Control Station |
| RCT | Rover Control Terminal |
| RD | Reference Document |
| RDC | relative damage coefficients |
| RDD | Return Data Delay |
| RDM | radiation design margin |
| RDR | Radiator Deploy/Retract |
| RDS | Russian Docking System |
| RDTE | Research, Development, Testing and Evaluation |
| RDV | Rendezvous |
| RE | Ranging Equipment |
| RE | radiated emission |
| RE | Earth radius |
| REACH | Registration, Evaluation, Authorisation & Restriction of Chemicals (European Regulation) |
| REACH | registration, evaluation, authorisation of chemicals |
| REALM | RFID Enabled Autonomous Logistics Management |
| REALOP | Remote Experimentation & Analysis of Low Orbit Phenomena |
| RECONSO | Reconnaissance of Space Objects |
| RECS | Russian Equipment Control System |
| REDU | ESA Satellite Ground Station in Redu Belgium |
| REG | regulated electron gun |
| REM | Roentgen/RAD Equivalent Man |
| REM | Rat Enclosure Module (for SLS mission) |
| RENAISSANCE | Reusable Network Architecture for Interoperable Space Science, Analysis, Navigation and Control Environments |
| REP | Rendezvous Evaluation Pod |
| RER | Receiver-Exciter Ranging |
| RES | equivalent symbol rate |
| REST | Representational State Transfer architecture |
| RET | tether,retractable equipment t. |
| RET | Rendezvous Evaluation Table |
| RETRY | retry control word |
| REV | Russian EVA operations (crew position) |
| REV | Response Execution Verification |
| REX | Radiation Experiment |
| REXS | Radiation Experiments SatelliteRadar Imaging Satellite |
| RF | Radio Frequency |
| RFA | Request for Action |
| RFA | request for approval |
| RFC | Rotary Fluid Coupler |
| RFC | Radio Frequency Compatibility |
| RFCP | reduced fracture-control programme |
| RFD | Reentry Flight Demonstration |
| RFD | Request for Deviation |
| RFI | Radio Frequency Interference |
| RFI | Request for Information |
| RFID | Radio Frequency IDentification |
| RFISS | Radio Frequency Interference Surveillance System |
| RFNA | Red Fuming Nitric Acid |
| RFP | Request for Proposal |
| RFP | Request For Proposals |
| RFQ | Request for Quotation |
| RFQ | request for quote |
| RFRR | Russian Facility Readiness Review |
| RFS | Request for Service |
| RFSA | Russian Federal Space Agency |
| RFSOC | Radio Frequency Simulations Operations Center |
| RFT | reduced functional test |
| RFTA | Recyclable Filter Tank Assemblies |
| RFTS | Radio Frequency and Telemetry Station |
| RFTSat | Radio Frequency Tag Satellitee |
| RFW | Request for Waiver |
| RFW | Request For Work |
| RGA | rate gyro assembly |
| RGAC | Radiator Goal Angle Calculation |
| RGPS | Relative GPS |
| RGRT | Remote Ground Relay Terminal |
| RGS | Russian Ground Station |
| RGS | Requirements Generation System |
| RGS | reflection grating spectrometer |
| RH | relative humidity |
| RHA | radiation hardness assurance |
| RHC | rotational hand controller |
| RHCP | Right Hand Circular Polarization |
| RHEED | Reflection High Energy Electron Diffraction |
| RHESSI | Reuven Ramaty High Energy Solar Spectroscopic Imager (formerly: HESSI,High Energy Solar Spectroscopic Imager) |
| RHESSI | Reuven Ramaty High Energy Solar Spectroscopic Imager |
| RHR | right hand rule |
| RHS | right handed system |
| RHU | radiosisotope heater unit |
| RHX | regenerative heat exchanger |
| RI | Rack Interface |
| RI | refractive index |
| RI&V | Requirements Integration & Verification (For GS IPS PLs) |
| RIACS | Research Institute for Advanced Computer Science |
| RIC | rack interface controller |
| RIC | Rack Interface Computer |
| RID | Review Item Discrepancy |
| RID | Requirement Input Document |
| RID | Review Item Disposition |
| RID | Review Item Discrepancy/Disposition |
| RIDM | Risk-Informed Decision Making |
| RIDU | Remote Interface Data Unit |
| RIE | Rapid Improvement Events |
| RIN | relative intensity noise |
| RIO | Remote Interface Officer |
| RIO | Russian Interface Officer |
| RIP | Requirements Integration Panel |
| RIS | remote triaxial sensor |
| RISAT | Radar Imaging Satellite |
| RISC | Reduced Instruction Set Computer |
| RISS | Russian Inventory Stowage Specialist |
| RIU | Remote Interface Unit |
| RIV | Requirements, Integration & Verification |
| RJ | jovian radius |
| RJF | requirement justification file |
| RJOP | Russian Joint Operations Panel |
| RKE | relative knowledge error |
| RLCL | retriggerable latching current limiter |
| RLEP | Robotic Lunar Exploration Program |
| RLG | Ring Laser Gyro |
| RLT | RMS Laptop Terminal (JEM) |
| RLTF | Rack Level Test Facility |
| RLV | reusable launch vehicle |
| RLVCC | RLV Control Center |
| RM | Radiometer |
| RM | Risk Management |
| RM | Review Manager |
| RM | Radiation Meteoroid |
| RM | Research Module |
| RM1 ... RM3 | Research Module 1,2,3 |
| RMA | Reliability, Maintainability, Availability |
| RMAP | remote memory access protocol |
| RMB | Risk Management Board |
| RMC | raw material certificate |
| RMCT | Robot Micro Conical Tool (SPDA) |
| RMD | Risk Management Database |
| RMDC | Radiometric Data Conditioning |
| RME | Random muscular exertion |
| RME | Relay Mirror Experiment |
| RML | residual mass loss |
| RML | recovered mass loss |
| RMO | Risk Management Officer |
| RMOC | Remote Mission Operations Center |
| RMP | Risk Mitigation Phase |
| RMP | Risk Management Plan |
| RMPR | Reliability & Maintainability Predictions Report |
| RMS | Radiation Meteoroid Satellite |
| RMS | Remote Manipulator System |
| RMS | Root Mean Square |
| RMS | relay cell |
| RMSA | Rack Maintenance Switch Assembly |
| RMW | read-modify-write |
| RMWG | Risk Management Working Group |
| RN | Release Note |
| RNGC | Revised New General Catalog |
| RNase | Ribonuclease |
| ROBUSTA | Radiation on Bipolar Test for University Satellite Application |
| ROC | Remote Operations Center |
| ROCC | Eastern Range Operations Control Center |
| ROCSat | Republic of China Satellite |
| ROD | review of design |
| ROD | review-of-design |
| RODF | Russian Operations Data File |
| ROEU | remotely operable electrical umbilical |
| ROEU | Remotely Operated Electrical Umbilical |
| ROH1 | IEC 61190-1-3 (2002) flux designation: rosin, high activation (≥ 2 % halide) |
| ROL0 | IEC 61190-1-3 (2002) flux designation: rosin, very low activation (< 0,01 % halide) |
| ROL1 | IEC 61190-1-3 (2002) flux designation: rosin, low activation (< 0,15 % halide) |
| ROM | read-only memory |
| ROM | read only memory |
| ROM/RAM | read only memory / random access memory |
| ROS | Russian Orbital Segment |
| ROSA | Roll-Out Solar Array |
| ROSAT | ROentgen SATellite |
| ROSES | Research Opportunities in Space & Earth Science |
| ROTFL | Rolling On The Floor Laughing |
| ROUS | Rodents Of Unusual Size (I don't believe they exist) |
| RPC | remote power controller |
| RPC(M) | Remote Power Controller (Module) |
| RPCM | remote power controller module |
| RPCS | Robotics Planning & Control Station |
| RPDA | remote power distribution assembly |
| RPDO | receive PDO |
| RPE | relative performance error |
| RPF | robotics planning facility |
| RPFS | Research Partnerships and Flight Support |
| RPM | Revolutions Per Minute |
| RPOD | Rendezvous, Proximity Operations, and Docking |
| RPOD | Rendezvous, Proximity Operations & Docking |
| RPODU | RPOD & Undocking |
| RPP | rectangular parallelepiped |
| RPS | Record and Playback Subsystem |
| RPS | Relativistic Proton Spectrometer |
| RPS | Radioisotope Power System |
| RPT | Rocket Propulsion Testing |
| RPTA | Rudder Pedal Transducer Assembly |
| RPU | Receiver/Processor Unit |
| RPWG | Research Planning Working Group |
| RQ | Requirement |
| RQ; Reqrmt | requirement |
| RR | Readiness Review |
| RRF | Risk Reduction Flight |
| RRM | Robotic Refuelling Mission |
| RRPT | review of design report |
| RRW | rate random walk |
| RS | Rohini Satellite |
| RS | Radio Sputnik |
| RS | Russian Segment |
| RS | like in ESA-ISS-COL_SEC-RS-002 |
| RS | Russian (on-orbit) Segment |
| RS | Right Side |
| RS | Relay Satellite |
| RS-25d | Core Stage Engine (Pratt & Whitney Rocketdyne, Inc) |
| RSA | Russian Space Agency |
| RSA | Russian Aviation & Space Agency |
| RSAS | Raytheon Space & Airborne Systems |
| RSC-E | Rocket & Space Corporation Energia |
| RSC-E; RSCE,RSC E | Rocket Space Corporation-Energia; RSC Energia |
| RSCC | Russian Space Control Center |
| RSC–E | Rocket Space Corporation–Energia |
| RSDO | Rapid Spacecraft Development Office |
| RSEL | Robotic Systems Evaluation Laboratory |
| RSK | Recumbent Seat Kit |
| RSMM | Russian Segment Mathematical Model |
| RSN | Radio SuperNova |
| RSN | Real Soon Now |
| RSP | respiratory support pack |
| RSP | resupply stowage platform |
| RSR | resupply stowage rack |
| RSRB | Reusable Solid Rocket Booster |
| RSRM | Reusable Solid Rocket Motor |
| RSS | reusable space system |
| RSST | Russian Segment Support Team |
| RST | Read Signal Tone |
| RSTF | Russian segment training facility |
| RSU | roller suspension unit |
| RT | Remote Terminal |
| RT | Rate |
| RTAS | Boeing/Rocketdyne truss attachment system |
| RTAX | A field programmable gate array on RSBP |
| RTC | Real Time Combiner |
| RTC | Return Trajectory Corrections |
| RTCC | Real Time Computer Complex |
| RTDS | Radar Tracking Density Satellite |
| RTE | Reusable TE |
| RTEMS | Real-Time Executive for Multiprocessor Systems |
| RTF | Return to Flight |
| RTFM | Russian Telemetry from Moscow |
| RTG | Radioisotope Thermoelectric Generator |
| RTI | Runtime Infrastructure |
| RTL | register transfer logic |
| RTL | ready to latch |
| RTLS | Return to Launch Site |
| RTLS | Return To Launch Site (Shuttle abort plan) |
| RTM | requirement traceability matrix |
| RTMM | Real Time Mission Monitor |
| RTN | Return to Normal |
| RTN | Return (Link) |
| RTOS | Real Time Operating System |
| RTP | Rohini Test Payload |
| RTR | remote transmission request |
| RTS | Robonaut Teleoperation System |
| RTS | system,Range Tracking System (AFSS) |
| RTS | Range Tracking System (AFSS) |
| RTS | remote triaxial sensor |
| RTS | Real Time System |
| RTT | Research Transition Teams |
| RU | Rigid Umbilical |
| RUC | Rectangular Umbilical Connectors |
| RUD | Rapid Unplanned Disassembly |
| RUD | Rapid Unscheduled Disassembly |
| RUPS | Recorder/Utility Processor System |
| RUPSM | resource utilization planning & system models |
| RUST | Remote User Scheduling Terminal |
| RV | re-entry vehicle |
| RVAC | response vector assurance criterion |
| RVCO | RVE closeout |
| RVD | Rendezvous & Docking |
| RVE | rack volume equivalent |
| RVEs | Rack Volume Equivalents |
| RVT | Reference Vehicle Design |
| RW | rework simulation |
| RWND; Rew | rewind |
| RWS | robotics workstation |
| RX | receive |
| RXERR | receive error control word |
| RXTE | Rossi X-Ray Timing Explorer |
| RX_EN | receive enable |
| RadFxSat | Radiation Effects Satellite |
| RadHard | radiation hardened |
| Radcal | Radiation Calibration |
| Radcat | Radar Calibration Target |
| Radsat | Radiation Satellite |
| RainCube | Radar In a CubeSat |
| Rbar | radius vector |
| Rcd | record |
| Rchs | channel symbol rate |
| Rcv | receive |
| Rcvd | received |
| Rdy | ready |
| ReMAP | Research Maximization and Prioritization Task Force |
| Reflector | Retro-reflector Ensemble For Laser Experiments, Calibration, Testing & Optical Research |
| Rel | relative |
| Rel | release |
| RelMo | motion,relative motion (in plane) |
| RelMo | Relative Motion (in plane) |
| Req | require |
| Req | request |
| Retro | Retrorockets |
| Rev | revolution |
| Rev | review |
| Rev | reverse:- |
| Rev. | Revision |
| Rg | resistance to ground |
| Ri | insulation resistance |
| RoHS | restriction of certain hazardous substances |
| RoHs | restriction of the use of certain hazardous substances |
| Rodnik | Rodnik water supply assembly |
| Roscosmos | Russian Federal Space Agency |
| Rot | rotation |
| RpK | Rocketplane-Kistler |
| Rtn | return |
| Rx | receiver |
| S | Scientific |
| S&B | Storage & Backup |
| S&MA | Safety & Mission Assurance |
| S&MA | Safety and Mission Assurance |
| S-CUBE S3 | Shootingstar Sensing Satellite |
| S-Z | DDS Station Zone |
| S-band | S-band subsystem |
| S.C. | (AM0) solar constant at air mass 0 |
| S.C. | solar constant |
| S/A | Supplemental Agreement |
| S/A | Solar array |
| S/C | SpaceCraft |
| S/E | Space-to-Earth |
| S/G | Space-to-Ground |
| S/N | signal to noise ratio |
| S/P | Soyuz/Progress |
| S/S | Space-to-Space |
| S/S | Subsystem |
| S/W | software |
| S0 | Starboard Truss System 0 |
| S1P1 | Starboard 1 Port 1 |
| S3 | Small Secondary Satellite |
| S3P3 | Starboard 3 Port 3 |
| S; Stbd | starboard |
| SA | Sample Acquisition, Processing, & Handling (drill for MSL) |
| SA | System Administrator |
| SA | Supplemental Agreement |
| SA | Spacecraft Adapter |
| SA | Sinoauricular node |
| SA | Service Agreement |
| SA | Single Access |
| SA | Infrastructure Monitoring System (ColCC) |
| SA | Spar Aerospace |
| SA | solar array |
| SA | Saturn Apollo |
| SA&R | System Architecture and Requirements |
| SAA | South Atlantic Anomaly |
| SAA | Space Act Agreement |
| SAAM | Space Act Agreement Maker |
| SABIA-Mar SAC E | Satélites Argentino-Brasileño para Información Ambiental del Mar |
| SAC | Senate Appropriations Committee |
| SAC | Satelite de Aplicaciones Cientificas |
| SAC | Satellite de Aplicaciones Cientificas |
| SAC-B/HETE | Scientific Applications Satellite/High Energy Transient |
| SAC-C | Satellite de Aplicaciones Cientificas |
| SAC-D | Satellite de Aplicaciones Cientificas–D (Argentina) |
| SACI | Satélite Científico |
| SACS | SSRMS Arm Control Software |
| SAD | solar array drive |
| SADA | Solar Array Drive Assembly |
| SADM | solar array drive mechanism |
| SAE | Society of Automotive Engineers |
| SAEF | Spacecraft Assembly and Encapsulation Facility |
| SAFER | Simplified Aid for EVA Rescue |
| SAGA | Solar Array Gain Augmentation (for HST) |
| SAGE | Stratospheric Aerosol & Gas Experiment |
| SAGE | strategic aerosol & gas experiment |
| SAIC | Science Applications International Corporation |
| SAID | Strategic Analysis & Integration Division |
| SAIL | Shuttle Avionics Integration Lab |
| SAL | Spread Around Liquid |
| SALMON | Stand Alone Missions of Opportunity NRA |
| SALSAT | Spectrum AnaLysis Satellite |
| SALT | Spinsat Altimeter |
| SAM | scanning acoustic microscopy |
| SAM | scanning accoustic microscopy |
| SAM | Stratospheric Aerosol Measurement |
| SAM | SFA Attachment Mechanism (on JEM A/L table) |
| SAM | scanning acoustic microscope |
| SAM-II | second-generation space acceleration measurement system |
| SAMBA | Satellite for Measurement of Background Anisotropies |
| SAMMI | Standards-based Advanced Man-Machine Interface |
| SAMPEX | Solar Anomalous and Magnetospheric Particle Explorer |
| SAMPEX | Solar Anomalous & Magnetospheric Particle EXplorer |
| SAMS | Space Acceleration Measurement System |
| SAMS | Servicing and Maintenance System |
| SAMSON | Space Autonomous Mission for Swarming & Geolocation with Nanosatellites |
| SAN | Storage Area Network |
| SANA | Space Assigned Numbers Authority |
| SAO | Smithsonian Astrophysical Observatory |
| SAOCOM | Satélite Argentino de Observación Con Microondas |
| SAP | Stand-Alone Payload |
| SAP | NASA’s Core Financial System |
| SAPPHIRE | Stanford Audio Phonic Photographic Infra Red Experiment |
| SAR | Search & Rescue |
| SAR | Software Acceptance Review |
| SAR | Schedule and Request |
| SAR | Search and Rescue |
| SAR | Synthetic Aperture Radar |
| SARA | Satellite Amateur de Radio-Astronomie |
| SARA | Satellite pour Astronomie Radio Amateur |
| SAREX | Shuttle amateur radio experiment |
| SAREX | Search & Rescue Exercise |
| SAREX | Space Amateur Radio Experiment |
| SARJ | solar alpha rotary joint |
| SARSAT | Search and Rescue Satellite-Aided Trucking |
| SARSAT | Search & Rescue Satellite Aided Tracking |
| SART | Security Assessment & Report Team |
| SART | Security Analysis & Response Team (sub-panel of ISS GSCB) |
| SAS | Shuttle Avionics System |
| SAS | Special Application Software |
| SAS | Space Adaptation Syndrome |
| SAS | Small Astronomy Satellite |
| SAS | Space Activity Suit |
| SASSI2 | Student Aerothermal Spectrometer Satellite of Illinois & Indiana |
| SAT | Synthetic Aperture Telescope |
| SAT | Strategic Astrophysics Technology |
| SATEC | Satélite Tecnológico |
| SATMON | Satellite Monitoring Tool |
| SAU | Strategic Airspace Usage |
| SAVE | (solstice MTPE instrument) |
| SAVIO | Software and Avionics Integration Office |
| SAW | solar array wing |
| SAX | Satellite Astronomia Raggio-X |
| SB | Storage Battery |
| SB | solder bath float |
| SB | Small Business |
| SB | small body |
| SB/SDB | Small Business/Small Disadvantage Business |
| SBA | Sorbent Belt Assembly |
| SBAS | Satellite-based Augmentation System (ESA) |
| SBC | Single Board Computer |
| SBD | Special Bus Design |
| SBDR | Strategic Budget Decision Review |
| SBF | start of broadcast frame |
| SBIR | Small Business Innovative Research |
| SBIR | Small Business Innovation Research |
| SBIRS-High | Space Based Infra Red Sensor - High Altitude |
| SBIRS-Low | Space Based Infra Red Sensor - Low Altitude |
| SBLO | Small Business Liaison Officer |
| SBNg | Software Bus Network - Gateway |
| SBP | Systolic blood pressure |
| SBRS | Santa Barbara Remote Sensing (Division of Raytheon) |
| SBS | Satellite Business System |
| SBSS | Space-Based Space Surveillance |
| SBT | S-Band Transceiver |
| SBTS | Sistema Brasilero de Telecomunicacoes por Satellite |
| SBU | Sensitive But Unclassified |
| SC | Spacecraft |
| SC | Space Communications |
| SC | Switching Center |
| SC | short circuit |
| SC | Security Critical |
| SC | stress-corrosion |
| SC | Statement of Capability |
| SCA | Simulation Control Area |
| SCA | Shuttle Carrier Aircraft |
| SCADA | Supervisory Control & Data Acquisition |
| SCAMA | Switching, Conferencing, and Monitoring Arrangement |
| SCAMP | Supersonics Caustic Analysis & Measurement Program |
| SCAMPI | standard CMMI appraisal method for process improvement |
| SCAP | Shared Capacity Asset Program |
| SCAP | Shared Capability Assets Program |
| SCAPE | Self-Contained Atmospheric Protection Ensemble |
| SCAR | Smoke, Clouds, and Radiation |
| SCARI | Self Compensating All Reflection Interferometer |
| SCAT | Spaceflight Cognitive Assessment Tool |
| SCATHA | Spacecraft Charging At High Altitudes |
| SCAWG | Space Communications Architecture Working Group |
| SCB | Security Control Board |
| SCC | stress-corrosion cracking |
| SCC | space component coordination |
| SCC | stress corrosion cracking |
| SCCIB | Space Communications Coordination and Integration Board |
| SCCS | Spaceport Command & Control System |
| SCD | Satellite Ceintificus Development -(Brazilian Environ) |
| SCD | Satelites de Coleta de Dados |
| SCDS | Space Communications & Data Systems |
| SCE | Store & Forward Selective Communication Experiment |
| SCE | Spacecraft Command Encoder |
| SCEF | stress-corrosion evaluation form |
| SCEM | The Scientific Context for Exploration of the Moon, NRC Planetary Science report |
| SCENIC | SCaN Compatibility Environment for Networks and Integrated Communications |
| SCET | spacecraft elapsed time |
| SCEX | Several Compatible Experiments using Rocket-borne Accelerator |
| SCF | software configuration file |
| SCI | scaleable coherent interface |
| SCID | Spacecraft Identifier |
| SCIF | Sensitive Compartmented Information Facility |
| SCIFER | Souding of the Cleft Ion Fountain Energization Region |
| SCIO | Space Communications Integration Office |
| SCIP | SCaN Constellation Integration Project |
| SCIR | Station Cargo Integration Review |
| SCISAT | Scientific Satellites From Canada |
| SCM | Space Operations Commercialization Manager |
| SCM | Station Cargo Manifest |
| SCM | Single Column Model |
| SCMB | Space Communications Management Board |
| SCMM | Space Communications Mission Model |
| SCNS | Space Communications Network Services |
| SCO | Space Communications Office |
| SCOE | Special Checkout Equipment |
| SCOF | SOP Checkout Fixture |
| SCORE | Signal Communication Orbit Relay Experiment |
| SCP | Station Communications Processor |
| SCP | Standard Console Procedure |
| SCPB | Space Communications Planning Board |
| SCPS | Space Communications Protocol Standards |
| SCR | Strip Chart Recorder |
| SCR | Selective Catalytic Reduction |
| SCR | Software Change Request |
| SCR | SOMO Change Request |
| SCS | Specialized Customer Services |
| SCS | Scan Correlated Shift |
| SCS | Small Communication Satellite |
| SCS | Stabilization and Control System |
| SCSB | Space Components Steering Board |
| SCSC | Spacecraft Computer Support Center |
| SCSI | Small Computer System Interface |
| SCT | Schmidt-Cassegrain Telescope |
| SCTS | SCaN Compatibility Test Set |
| SCU | sync & control unit |
| SCUBA | Self-Contained Under-Water Breathing Apparatus |
| SCWG | Spacecraft Control Working Group |
| SCaN | Space Communications & Navigation |
| SCaN | Space Communications and Navigation |
| SCaN-Tesbed | Space Communications & Navigation Testbed |
| SCaNCB | Space Communications and Navigation Control Board |
| SD | State Determination |
| SD | Smoke Detector |
| SD2 | NISN Service Design and Development |
| SDA | Subcarrier Demodulator Assembly |
| SDB | Small Disadvantaged Business |
| SDBP | spacecraft data bus protocol |
| SDC | Science Data Centre |
| SDC | Shuttle Data Center |
| SDD | Software Design Document |
| SDD | Service Description Document |
| SDDF | SW Design & Development Facility |
| SDDN | Secure Data Distribution Network |
| SDDR | System Detailed Design Review |
| SDE | software development environment |
| SDES | Solar Dynamic Energy System |
| SDF | Software Development Facility |
| SDF | start of data frame |
| SDFD | Solar Dynamic Flight Demonstration |
| SDFR | short-duration foot restraint |
| SDI | Strategic Defense Initiative |
| SDI | Solenoid Driver Input |
| SDIL | Software Development Integration Laboratory |
| SDIL | Software Development & Integration Laboratory (Houston) |
| SDIO | Strategic Defense Initiative Organization (now BMDO) |
| SDIS | Switched Digital Integrated Service |
| SDK | software development kit |
| SDLC | Synchronous data link control |
| SDM | Solar Dynamic Module |
| SDM | Space Debris Mitigation |
| SDM | Separation and Distancing Module |
| SDMA | Space Division Multiple Access |
| SDMS | Secured DMS |
| SDMS | Secure Document Management System |
| SDO | Space Discovery Office |
| SDO | Solar Dynamics Observatory |
| SDO | Solenoid Driver Output |
| SDOF | single degree of freedom |
| SDOM | Station Development Operations Meeting |
| SDP | Spin-plane Double Probe |
| SDP | Special Defense Program |
| SDP | Science Data Processing |
| SDPF | Sensor Data Processing Facility |
| SDR | Software Defined Radio |
| SDR | System Design Review |
| SDR | System Definition Review |
| SDRAM | synchronous dynamic random access memory |
| SDRD | Subcontractor Data Requirement List |
| SDS | Satellite Data System |
| SDS | Shuttle Drawing System |
| SDS | Switched Data Service |
| SDSMP | Space Data Standards Management Plan |
| SDSR | Service Delivery Status Report |
| SDTO | Station Development Test Objective |
| SDU | service data unit |
| SE | sensor enclosure |
| SE | Systems Engineering |
| SE | &I System Engineering & Integration |
| SE | Solar Explorer |
| SE&A | Systems Engineering and Architecture |
| SE&I | Systems Engineering & Integration |
| SE&I | System Engineering and Integration |
| SE&OI | System Engineering & Operations Integration |
| SEA | Scientist’s Expert Assistant |
| SEA | Sun exclusion angle |
| SEAC4RS | Southeast Asia Composition, Cloud, Climate Coupling Regional Study |
| SEAS | Systems Engineering and Analysis Support |
| SEASTAR | Commercial Data Buy Of Ocean Color Data |
| SEAT | Safety Engineering Analysis and Test |
| SEATEST | Space Environment Analog for Testing EVA Systems & Training |
| SEAWARS | Seawater-Activated Release System |
| SEB | single event burn-out |
| SEB | Source Evaluation Board |
| SEBO | single event burn-out |
| SEC | Security |
| SEC | Sun-Earth Connection |
| SECO | Second Engine Cut-Off |
| SECOR | Sequential Collation of Range |
| SECS | Special Experimental Communication System |
| SED | single event disturb |
| SEDR | single event dielectric rupture |
| SEDS | Small Expendable Deployer System |
| SEDS | Students for the Exploration & Development of Space |
| SEDSAT | Students For Exploration & Development Satellite |
| SEDSat | Students for the Exploration & Development of Space Satellite |
| SEE | single-event effect |
| SEE | single event effects |
| SEE | single event effect |
| SEE | single level effect |
| SEE | secondary electron emission |
| SEEA | Software Error Effects Analysis |
| SEED | Spacecraft Electrical Equipment Database |
| SEEDS | Space Engineering Educational Satellite |
| SEER | Support Engineering Evaluation Room |
| SEF | spectral efficiency factor |
| SEF | System Engineering Facility (GSFC) |
| SEF | Sustaining Engineering Facility |
| SEFI | single event functional interrupt |
| SEGR | single event gate rupture |
| SEHE | single event hard error |
| SEI | Space Exploration Initiative |
| SEID | Service Element Identification |
| SEL | single-event latch-up |
| SEL | Single Event Latching/Latchup |
| SEL | single event latch-up |
| SELENE | Selenological & Engineering Explorer |
| SELENE | SELenological and ENgineering Explorer |
| SELV | Small Expandable Launch Vehicle |
| SEM | scanning electronic microscope |
| SEM | scanning electron microscope |
| SEMAA | Science Engineering Mathematics Aerospace Academy |
| SEMDA | System Engineering,Modeling,and Design Analysis |
| SEMDA | System Engineering,Modeling,& Data Analysis |
| SEMP | Systems Engineering Management Plan |
| SENSE | Space Environmental NanoSat Experiment |
| SEO | Space Environment Officer |
| SEP | Solar Energetic Particles |
| SEPE | solar energetic particle event |
| SEPE | solar energetic particle events |
| SEPS | secondary electrical power system |
| SEPs | solar energetic particles |
| SEQ_NUM | sequence number |
| SER | Savings Estimating Relationship |
| SEREP | system equivalent reduction expansion process |
| SERF | Software Engineering Research Facility |
| SERPENS | Sistema Espacial para Realização de Pesquisa e Experimentos com Nanossatélites |
| SERS | Space Erectable Radiator System |
| SERT | Space Electric Rocket Test |
| SERTS | Solar EUV Rocket Telescope & Spectrograph |
| SERVIS | Space Environment Reliability Verification Integrated System |
| SES | Senior Executive Service |
| SESAT | Sibirian European Satellite |
| SESB | single event snapback |
| SESP | Space Experiment Support Program |
| SEST | Swedish ESO Submillimeter Telescope |
| SET | Space Environment Testbeds |
| SET | Systems Engineering Team |
| SETAG | Space Environment Test Alliance Group |
| SETI | Search for ExtraTerrestrial Intelligence |
| SEU | Structure and Evolution of the Universe |
| SEU | single event upset |
| SEV | Scout Evaluation Vehicle |
| SEWG | Systems Engineering Working Group |
| SEWG | System Engineering Working Group |
| SEWP | Solutions for Enterprise-Wide Procurement |
| SEY | secondary emission yield |
| SFA | small fine arm |
| SFA | Small Fine Arm (JEMRMS) |
| SFAC | Space Flight Advisory Council |
| SFCA | system flow control assembly |
| SFCG | Space Frequency Co-ordination Group |
| SFCO | Space Flight Crew Operations |
| SFMEA | Software FMEA |
| SFOC | Space Flight Operations Contract |
| SFOC | Space Flight Operations Contract(or) |
| SFOF | Space Flight Operations Facility |
| SFPP | Space flight participant program |
| SFRM | Student Flow Research Model |
| SFS | Space and Flight Support |
| SFS | Space & Flight Support |
| SFT | system functional test |
| SFU | Space Flyer Unit |
| SFW | Subsonic Fixed Wing |
| SG | Study Group (ITU-R) |
| SG | general specification |
| SG 4 | ITU-R Study Group 4 – Fixed Satellite Service |
| SG 7 | ITU-R Study Group 7 – Science Services |
| SGANT | antenna group |
| SGAS | Second Guam Antenna System |
| SGDC | Satélite Geoestacionário de Defesa e Comunicações Estratégicas |
| SGI | Silicon Graphics Inc. |
| SGICD | space-to-ground interface control document |
| SGL | Space Ground Link |
| SGLS | Satellite Ground Link System |
| SGLT | Space-to-Ground Link Terminals |
| SGLT | Space to Ground Link Terminal |
| SGM | SafeGuard Memory |
| SGMT | Simulation GMT |
| SGS | Svalbard Ground Station (Norway) |
| SGS | Solar Generation System |
| SGSS | Space Network Ground Segment Sustainment |
| SGVS | Space-to-Ground Voice System |
| SH | Southern Hemisphere |
| SH&E | Safety, Health and Environment |
| SHA | system hazard analysis |
| SHARC | Satellite for High Accuracy Radar Calibration |
| SHARES | SHAred RESources |
| SHARP | Slender Hypervelocity Aerothermodynamic Research Probe |
| SHC | Structural Hazard Control |
| SHE | Safety, Health and Environment |
| SHF | super-high frequency (3 GHz-30 GHz) |
| SHF | super high frequency, frequency from 3 GHz to 30 GHz |
| SHFE | Space Human Factors Engineering |
| SHFT | Space-based High Frequency Testbed |
| SHIELDOSE | space shielding radiation dose calculations |
| SHM | Structural Health Monitoring |
| SHO | Scheduling Order |
| SHO | Satellite Handover |
| SHP | SharePoint |
| SI | System Integration |
| SI | Strategic Integration |
| SIA | starboard inboard aft |
| SIAG | Space Internetworking Architecture Group |
| SIC | Support Identification Code (GSFC) |
| SIC | Standard Industrial Classification |
| SICRAL | Sistema Italiano per Comunicazioni Riservate ed Allarmi |
| SID | Short Identifier |
| SID | Sudden Ionospheric Disturbance |
| SIDEX | Signal Identification Experiment |
| SIF | starboard inboard forward |
| SIGF | Solar Irradiance Gap Filler |
| SIGI | Space Integrated GPS/INS |
| SIGMA | Scientific cubesat with Instruments for Global magnetic field & radiation |
| SII | Strategic Institutional Investments |
| SIIP | Space Internetworking Infusion Project |
| SIL | System Integration Laboratory |
| SIM | Space Interferometer Mission |
| SIM | Space Interferometry Mission |
| SIM | Simulation |
| SIM SUP | Simulation Supervisor |
| SIMBA | Sun-earth Imbalance |
| SIMPL | Satlet Initial-Mission Proofs & Lessons |
| SIMSS | Scalable Integrated Multi-mission Simulation Suite |
| SINOD | SRI International NanoSat Orbital Demonstration |
| SINSG | SCaN Integrated Network Steering Group |
| SIOT | System Integrated Operations Test |
| SIP | SCaN Internship Project |
| SIP | Standard Internet Protocol |
| SIP | Support Increment Planner |
| SIP | Space Interceptor Program |
| SIR | System Integration Review |
| SIR | Spaceborne Imaging Radar |
| SIR | Shuttle Imaging Radar |
| SIR | standard interface rack |
| SIRD | Support Instrumentation Requirements Document |
| SIRTF | Space Infrared Telescope Facility |
| SIRTF | Space Infrared Telescope |
| SIRTF | Space (formerly Shuttle) InfraRed Telescope Facility |
| SIS | Science Information Services |
| SISO | single input - single output |
| SISO | single input - single output system |
| SITE | Software Integration & Test Environment |
| SITF | Space Infrared Telescope Facility |
| SITF | Software Integration Testing Facility |
| SIUG | Special Interest User Groups |
| SIV&V | System Integration, Verification, and Validation |
| SIVQ | Software Integration & Verification |
| SIVVP | SCaN Integration Verification & Validation Plan |
| SJ | Single Joint (mode) |
| SJ | Shi Jian |
| SJEU | SPDM Joint Electronics Unit |
| SJRM | Single Joint Remote Manipulate |
| SK | stationkeeping (NASA term vs. hold ESA term) |
| SKD | orbit correction engine |
| SKIP | skip control word |
| SKM | space kinematic model |
| SL | Spacelab |
| SL | (Comet) Shoemaker-Levy |
| SL | Senior Level |
| SL-ASTRO | Spacelab - Astronomy |
| SL-ATLAS | Spacelab - Atmospheric Laboratory for Applications & Science |
| SL-D | Spacelab - Deutschland |
| SL-IML | Spacelab - International Microgravity Laboratory |
| SL-J | Spacelab - Japan |
| SL-LMS | Spacelab - Life & Material Science |
| SL-M | Spacelab - Mir |
| SL-MSL | Spacelab - Material Science Laboratory |
| SL-SLS | Spacelab - Space Life Science |
| SL-USML | Spacelab - United States Microgravity Laboratory |
| SLA | Service Level Agreement |
| SLA | Spacecraft LM Adapter panels |
| SLAR | Side-Looking Airborne Radar |
| SLC | Space Launch Complex |
| SLC | Scan Line Corrector |
| SLDCOM | Satellite Launch Dispenser Communication |
| SLDPF | Spacelab Data Processing Function |
| SLE | Space Link Extension |
| SLES | Spacecraft Life Extension System |
| SLF | Shuttle Landing Facility |
| SLI | Space Launch Initiative |
| SLM | Structure Latch Mechanism |
| SLOC | Single Line of Code |
| SLOC | Source Lines of Code |
| SLP | Spacelab pallet |
| SLP | System Level Procedure |
| SLPP | Summary Level Planning Package |
| SLPSRA | Space, Life & Physical Sciences Research & Applications |
| SLPSRAD | Space Life & Physical Sciences Research & Applications Division |
| SLR | Satellite Laser Ranging |
| SLS | Space Launch System |
| SLS | Space(lab) Life Sciences |
| SLSD | Space & Life Sciences Directorate (JSC) |
| SLSOV | Sample Line Shut Off Valve |
| SLSS | Shuttle Launch Support System |
| SLT | System Laptop Terminal (JEM) |
| SLU | Structure Latch Mechanism Unit |
| SM | Service Module |
| SM | Spectrum Management |
| SM | Statistical Multiplexer |
| SM | module,Service Module (CST-100) |
| SMA | Semi-Major Axis |
| SMA | Safety & Mission Assurance |
| SMA | S-band Multiple Access (GSFC) |
| SMA | Scan Mirror Assembly |
| SMA | Sensor Module Assembly |
| SMA | Science Monitoring Area |
| SMAC | spacecraft maximum allowable concentration |
| SMAC | System Monitor and Control |
| SMAF | S-band Multiple Access Forward |
| SMAP | Soil Moisture Passive and Active |
| SMAP | Soil Moisture Active/Passive |
| SMAR | S-band Multiple Access Return |
| SMART | SCaN Management Automation Resources Tool |
| SMART | Small Missions for Advanced Research in Technology |
| SMART | Safety and Mission Assurance Review Team |
| SMART-1 | Small Mission for Advanced Research & Technology |
| SMART-OP | Stress Management & Resilience Training for Optimal Performance (on long duration missions) |
| SMARTsat | Shape Memory Alloy Research Technology Satellite |
| SMC | Small Magellanic Cloud |
| SMC | Sciences Mission Directorate |
| SMC | Strategic Management Council |
| SMC | Sensor Management Council |
| SMC/TEL | Space & Mission Command/Test & Evaluation Directorate |
| SMCC | Service Module Central Computer |
| SMCDS | Space Mission Communications and Data Services |
| SMCH | Standard Mixed Cargo Harness |
| SMD | Science Mission Directorate |
| SMD | Space and Missile Defense |
| SMD JAT | Space and Missile Defense Joint Analysis Team |
| SMDC-One | Space Missile Defense Command - Operational Nanosatellite Effect |
| SMDC-TechSat | Space Missile Defense Command - Technology Satellite |
| SMDL | Simulation Model Definition Language |
| SMDP | SM Debris Panels |
| SMDR | Station Message Detail Reporting |
| SMDS | Statistical Multiplexer Data System |
| SMDS | Switched Multimegabit Data Service |
| SME | Subject Matter Expert |
| SME | Scan Mirror Electronics |
| SME | Solar Mesosphere Explorer |
| SMEX | SMall EXplorers |
| SMEX | Small Explorer |
| SMG | Spaceflight Meteorology Group |
| SMG | Spectrum Managers’ Group |
| SMG | Structures & Mechanisms Group |
| SMGM | Spectrum Managers Group Meeting |
| SMILE | Solar wind Magnetosphere Ionosphere Link Explorer |
| SMILES | Superconducting Submillimeter-Wave Limb-Emission Sounder |
| SML | FOD’s DDE Shared Model Library |
| SMM | Solar Maximum Mission |
| SMMOD | service module micrometeoroid & orbital debris shield |
| SMMR | Scanning Multichannel Microwave Radiometer |
| SMO | Space Medicine Office |
| SMO | Systems Management Office |
| SMOS | Soil Moisture & Ocean Salinity |
| SMP | Security Management Plan |
| SMP | System Management Policy |
| SMRSC | Service Module RSC |
| SMS | Safety & Mission Success |
| SMS | Shuttle Mission Simulator |
| SMS | Synchroneous Meteorological Satellite |
| SMS | Space motion sickness |
| SMT | Simulation Time |
| SMT | Simulated Mission Time |
| SMTF | Software Maintenance and Training Facility |
| SMTF | Shuttle Mission Training Facility |
| SMTP | Simple Mail Transport Protocol |
| SMTP | simple mail transfer protocol |
| SMTS | Space Missile Tracking System |
| SMU | single word multiple-bit upset |
| SN | Space Network |
| SN | SuperNova (e.g., SN1987A) |
| SN/GN | Space Network/Ground Network |
| SNA | System Network Architecture |
| SNAFU | Situation Normal All F**cked Up |
| SNAP | Systems and Networks Architecture Project |
| SNAPS | Stanford Nano Picture Satellite |
| SNAS | Space Network Access System |
| SNAT | Sun Attitude |
| SNC | Sierra Nevada Corporation |
| SNCD | Selected Non-Critical Data |
| SNE | Space Network Expansion |
| SNGG | Space Network Ground Segment Sustainment |
| SNGS | Space Network Ground Segment |
| SNIP | Space Network Implementation Plan |
| SNIP | Space Network Interoperability Program |
| SNIPE | Small scale magNetospheric & Ionospheric Plasma Experiment |
| SNIS | Space Network IP Services |
| SNL | Sandia National Laboratory |
| SNM | Space Network Modernization |
| SNMP | Simple Network Management Protocol |
| SNOE | Student Nitric Oxide Explorer |
| SNQR | Space Network Quarterly Review |
| SNR | SuperNova Remnant |
| SNR | Signal Noise Ratio |
| SNR | Signal to Noise Ratio |
| SNU | Solar Neutrino Units |
| SNUG | Space Network User’s Guide |
| SNVCD | Selected Non-Vital Command & Data |
| SNoOPI | SSigNals of Opportunity P-band Investigation |
| SO | Starshine Oscar |
| SO | SEDS Oscar |
| SO | Saudisat Oscar |
| SO | Sunsat Oscar |
| SO | Stikovchnoy Otsek |
| SOA | Statement of Assurance |
| SOA | starboard outboard aft |
| SOARS | Spacecraft Orbital Anomaly Reporting System |
| SOARS | Space Object Automated Reporting Systems |
| SOC | Simulation Operations Center |
| SOC | Science Operations Coordination |
| SOC | Science Operations Center |
| SOC | state of charge |
| SOC | Security Operations Center |
| SOC | Solar Orbiter Collaboration |
| SOC | Space Operations Council |
| SOCB | Space Operations Change Board — |
| SOCB | Space Operations Control Board |
| SOCCRATES | SW Only CEV Risk Reduction Analysis & Test Engineering Simulator |
| SOCRATES | Space Optical Communications Research Advanced Technology Satellite |
| SOCRATES | Signal of Opportunity Cubesat Ranging & Timing Experiments |
| SOD | small outline device |
| SODA | Space Operations Directive Agreement |
| SODF | systems operations data file |
| SODF | System Operations Data File |
| SODF | Station Operations Data File |
| SOE | Sequence of Events |
| SOE | Standard of Excellence |
| SOEP | Science Operations & Evaluation Plan |
| SOF | starboard outboard forward |
| SOFIA | Stratospheric Observatory for Infrared Astronomy |
| SOHO | Solar Heliospheric Observer |
| SOHO | Solar and Heliospheric Observatory |
| SOIC | small outline integrated circuits |
| SOICAL | Space Object Identification Calibration |
| SOIS | spacecraft onboard interface services (from CCSDS) |
| SOIS | spacecraft onboard interface services |
| SOLAR | Solar Monitoring Observatory Facility |
| SOLAR | NASA Site for Online Learning and Resources |
| SOLAR-A | (Japanese solar research satellite) |
| SOLC | Space Operations Learning Center |
| SOMD | Space Operations Mission Directorate |
| SOMO | Space Operations Management Office |
| SOMS | Shuttle-Orbiter Medical System |
| SOMS | Shuttle Orbiter Medical System |
| SONATE | Solutus Nano atellite |
| SONET | Synchronous Optical Network |
| SOOS | Stacked Oscars On Scout |
| SOP | Standard Operating Procedure |
| SOP | System Operations Procedure |
| SOR | Systems Operation Reference |
| SOR | System Operation Reference document |
| SORCE | Solar Radiation & Climate Experiment |
| SORCE | Solar Radiation and Climate Experiment |
| SORD | Support Operations Requirements Document |
| SORI | Small ORU Robotics Interface |
| SORI LV | SORI Launch Variant |
| SORR | Stage Operations Readiness Review |
| SORR | review,Stage Operations Readiness Review |
| SORTIE | Scintillation Observations & Response of The Ionosphere to Electrodynamics |
| SOS | Space Operations Service |
| SOS | Science on a Sphere |
| SOS | silicon-on-sapphire |
| SOS | software operation support |
| SOS | System of Systems |
| SOSC | Space Operations Support Center |
| SOST | Space Operations Streamlining Team |
| SOST | Subcommittee on Ocean Science & Technology |
| SOT | small outline transistor |
| SOTA | Special Operations and Testing Area |
| SOW | State of Work |
| SOW | statement of work |
| SP | Solar Probe |
| SP | System Processor |
| SP | SharePoint |
| SP&M | Special Projects and Missions |
| SP&OD | Suborbital Projects and Operations Directorate |
| SP-L | split phase-level |
| SPA | Shuttle Processing Area |
| SPA | software product assurance |
| SPACE-HAUC | Science Program Around Communication Engineering with High Achieving Undergraduate Cadres |
| SPADES | Solar Perturbation of Atmospheric Density Experiment Satellite |
| SPADEX | Space Docking Experiment |
| SPAICE | SPAce Infrastructure Computer gEneration |
| SPAMR | software product assurance milestone report |
| SPAN | Spacecraft Analysis Manager |
| SPAN | Space Physics Analysis Network |
| SPAN | Space Physics & Analysis Network |
| SPAN | Spacecraft Analysis (manager) |
| SPAN | Spacecraft Analysis (JSC) |
| SPAP | software product assurance plan |
| SPAR | Space Processing Application Rocket |
| SPARC | Space Plug-and-play Architecture Research Cubesat |
| SPARCLE | Space Readiness Coherent Lidar Experiment |
| SPARCS | Star-Planet Activity Research CubeSat |
| SPARTAN | Station Power |
| SPAS | Shuttle Palette Satellite |
| SPAS | Shuttle Pallet Satellite |
| SPASE | Small Payload Access to Space Experiment |
| SPC | Signal Processing Center |
| SPC | Standard Processing Computers |
| SPCB | Scan Program Change Board |
| SPCD | Secondary Power Conversion & Distribution |
| SPD | Space Product Development |
| SPDA | secondary power distribution assembly |
| SPDE | Secondary Power Domain Electronics |
| SPDG | Space Product Development Group |
| SPDM | special purpose dexterous manipulator (system) |
| SPDM | Special Purpose Dextrous Manipulator |
| SPDM | special purpose dexterous manipulator |
| SPDMS | Shuttle Processing Data Management System |
| SPE | special pressurized equipment |
| SPE | solar particle event |
| SPE | solar particle events |
| SPE | static phase error |
| SPEA | Solar Pressure Equilibrium Attitude |
| SPEAR | Space Power Experiment aboard Rocket |
| SPEC | Spectrometer |
| SPECTRE | Student Run Program for Exoatmospheric Collection Technologies Rocket Experiment |
| SPEL | synthetic parameter expression language |
| SPENVIS | Space Environment Information System |
| SPF | Service Providing Facilities |
| SPF | Space Power Facility |
| SPF | Software Production Facility |
| SPG | Strategic Planning Guidance |
| SPG | single point ground |
| SPHERES | Synchronized Position Hold, Engage, Reorient, Experimental Satellites |
| SPHINX | Space Plasma High-Voltage Interaction Experiment |
| SPI | Schedule (Work) Performance Index |
| SPI | Spectrometer on INTEGRAL |
| SPICE | Space Program Integrated Contract Environment |
| SPIDR | Spectroscopy & Photometry of the Intergalactic Medium's Diffuse Radiation |
| SPIE | Spacecraft Payload Integration Evolution |
| SPIF | Shuttle POCC Interface Facility |
| SPIF-RS | SPIF – Replacement System |
| SPINR | Spectrograph for Photometric Imaging with Numeric Reconstruction |
| SPIP | SSP’s Process Integrity Plan |
| SPIP | Station Program Implementation Plan |
| SPIP | Spacecraft Program Implementation Plan |
| SPIP | Strategic Program Implementation Plan |
| SPIRALE | Système Préparatoire Infra-Rouge pour l'Alerte |
| SPIRIT | Student Project Involving Rocket Investigation Techniques |
| SPIRIT | Space Infra-Red Imaging Telescope |
| SPIS | spacecraft plasma interaction simulation |
| SPK | Sredstvo Peredvizheniya Kosmonavtov |
| SPL | sound pressure level |
| SPLC | Standard Payload Computer |
| SPM | Service Performance Metrics |
| SPMC | Software Production Management & Control (JPL) |
| SPN | Station Program Note |
| SPO | Shuttle Program Office |
| SPO2 | O2 Saturation |
| SPOC | Space Program Operations Contract |
| SPOC | Shuttle Payload of Opportunity Carrier |
| SPOE | Standard Payload Outfitting Equipment |
| SPORT | Scintillation Prediction Observations Research Task |
| SPOT | Satellite Pour l’Observation de la Terre |
| SPOT | Satellite Pour l'Observation de la Terre |
| SPP | Solar Power Platform |
| SPP | Scientific Passenger Pod |
| SPP | science power platform |
| SPP | Solar Probe Plus |
| SPP | SCaN Program Plan |
| SPR | Software Problem Report |
| SPR | System Problem Report |
| SPR-Db | System Problem Reporting Database |
| SPROUT | Space Research On Unique Technology |
| SPRdb | System Problem Report data base |
| SPS | SM Propulsion System |
| SPS | Solar Power Satellite |
| SPS | Spectrum Planning Subcommittee (under the IRAC) |
| SPS | Service Planning Segment |
| SPSR | Service Planning Segment Replacement |
| SPSR | spectroreflectometer |
| SPT | System Performance Test |
| SPT | stationary plasma thruster |
| SPTR | Starboard Port Thermal Radiator |
| SPTR | South Pole TDRS Relay |
| SPU | Sample Processing Unit (CSLM) |
| SPV | single-pressure vessel |
| SPaH | Sample Acquisition, Processing, & Handling (drill for MSL) |
| SPjM | Sub-Project Managers |
| SQIF | Superconducting Quantum Interference Filter |
| SR | Special Relativity |
| SR | Sun Ray |
| SR | Space Radiation |
| SR | Senior Review |
| SR | Sunrise |
| SR | Service Request |
| SR | Support Requirements |
| SR&MA | Safety, Reliability, & Mission Assurance |
| SR&Q | Safety, Reliability, & Quality |
| SR&T | Supporting Research & Technology |
| SRA | Sequential Ranging Assembly |
| SRAM | static random access memory |
| SRATS | Solar Radiation & Thermospheric Satellite |
| SRB | Standing Review Board |
| SRB | Senior Review Board |
| SRB | booster,Solid Rocket Booster (LV) |
| SRB | Solid Rocket Booster |
| SRB-SEP | solid rocket booster separation |
| SRC | Sample Return Capsule |
| SRCS | Standardized Remote Channel Switch |
| SRD | System (or Subsystem) RequirementsDocument |
| SRD | Systems Requirements Document |
| SRDB | Satellite Reference Database |
| SRDS | Support Requirements Data Set |
| SRE | Space Capsule Recovery Experiment |
| SREM | Standard Radiation Environment Monitor |
| SRET | Satellite des Recherches et d'Etudes Technologiques |
| SRF | stellar reference frame |
| SRF | sensing reference frame |
| SRG | Stirling Radioisotope Generator |
| SRH | Shoulder Roll Held (control algorithm) |
| SRL | Space Radar Laboratory |
| SRM | Solid Rocket Motor |
| SRMS | Shuttle remote manipulator system |
| SRMSAT | Sri Ramaswamy Memorial Satellite |
| SRO | Software Release Order |
| SROSS | Streched Rohini Satellite Series |
| SRP | Space Radio Project |
| SRPM | Sun Reference Pointing Mode |
| SRR | System Requirement Review |
| SRR | System Readiness Review |
| SRRC | square-root raised-cosine |
| SRRE | Search Rescue and Recovery Element |
| SRS | Supplemental Reboost System |
| SRS | Systems Requirements Specification |
| SRS | Software Requirements Specification |
| SRS | Space Research Service |
| SRS | shock response spectrum |
| SRS | Service Request System |
| SRT | System Readiness Test |
| SRTM | Shuttle radar topography mission |
| SRTM | Space Radar Topography Mission |
| SRTT | Short Range Reflector Target |
| SRW | Subsonic Rotary Wing |
| SRWS | Simulated Robotic Workstation |
| SS | Scientific Satellite |
| SS | Space Shuttle |
| SS | Shutter Speed |
| SS7 | Signaling System 7 |
| SSA | SITE Simulation Assembly |
| SSA | Symbol Synchronizer Assembly |
| SSA | S-band Single Access |
| SSAF | S-band Single Access Forward |
| SSAR | S-band Single Access Return |
| SSAR | System Safety Analysis Report |
| SSAS | segment-to-segment attachment system |
| SSAS | Service Scheduling Applications Software |
| SSAT | Sector Shielding Analysis Tool |
| SSB | Soft Stowage Bag |
| SSB | space studies board |
| SSBRP | Space Station Biological Research Project |
| SSBUV | Shuttle Solar Backscatter Ultraviolet |
| SSC | Swedish Space Corporation |
| SSC | Station Support Computers |
| SSC | Station Support Computer |
| SSC | Stennis Space Center |
| SSCB | Space Station Control Board |
| SSCC | Space Station Control Center |
| SSCCD-O | Space Station Configuration Control Document - On-Orbit |
| SSCD | Space Station Change Directive |
| SSCM | Space Station Change Memo |
| SSCS | space-to-space communication system |
| SSD | Solar Sail Demonstration |
| SSDR | Subsystem/Software Design Review |
| SSDS | Service Supplied Diving System |
| SSE | Space Station Eyewash |
| SSE | Space Science Enterprise |
| SSE | Small fine arm Storage Equipment (JEF) |
| SSE | Solar System Exploration |
| SSEO | Solar System and Earth-Observing |
| SSEO | Space Science and Earth Observation |
| SSEO | Space Science and Earth Observing |
| SSETI-Express | Student Space Exploration & Technology Initiative - Express |
| SSF | Support Service Facilities |
| SSF | Space Station Fred (er, Freedom) (Superseded by ISS) |
| SSF | System Support Facility |
| SSFDR | Subsystem/Software Functional Design Review |
| SSFO | Space Shuttle Flight Office |
| SSG | Space Systems Group (old term, now SSS) |
| SSH | Secure Shell Protocol |
| SSHA | subsystem hazard analysis |
| SSI | Server Side Include |
| SSI | Space Studies Institut |
| SSI | Solid-State Imager (on Galileo) |
| SSIPC | Space Station Integration & Promotion Center |
| SSK | surface sampler kit |
| SSL | Secure Socket Layer |
| SSL | Secure Socket Layers |
| SSLA | Space Station Light Assembly |
| SSM | space system model |
| SSM | second surface mirror |
| SSM/I | Special Sensor Microwave/Imager |
| SSMB | Space Station Manned Base |
| SSMDM | Standard Space Station MDM |
| SSME | Space Shuttle Main Engine |
| SSMMU | Solid State Mass Memory Unit |
| SSNSAP | source subnetwork service access point |
| SSO | Source Selection Official |
| SSO | Space Shuttle Orbiter |
| SSO | Safety Significant Operations |
| SSORD | space segment operability requirements document |
| SSOT | Sistema Satelital para Observación de la Tierra |
| SSP | Solar Sail Sub Payload Soraseiru Sabupeiro-do |
| SSP | Space Station Program |
| SSP | Space Shuttle Program |
| SSPCB | Space Station Program Control Board |
| SSPCM | solid-state power control module |
| SSPF | Space Station Processing Facility |
| SSPO | Space Shuttle Program Office (JSC) |
| SSPS | Sky Survey Prototype System |
| SSR | Satelites de Sensoriamento Remoto |
| SSR | Solid State Recorder |
| SSR | Satellite Situation Report |
| SSR | (Digital) Solid State Recorder |
| SSR | Smart Switch Router |
| SSR | Bus loss Subsystem Recovery |
| SSRE | Search Rescue and Recovery Element |
| SSRML | Safety, Reliability, Maintainability, & Logistics |
| SSRMS | Space Station Remote Manipulator System |
| SSRT | Single Stage Rocket Technology |
| SSS | Space Systems Subcommittee (under the IRAC) |
| SSS | Sea Surface Salinity |
| SSS | Small Scientific Satellite |
| SSSR | space-to-Space-Station radio |
| SST | Spitzer Space Telescope |
| SST | SuperSonic Transport |
| SST | Spectroscopic Survey Telescope |
| SSTF | Space Station Training Facility |
| SSTO | Single Stage To Orbit |
| SSU | Space Shuttle Upgrades |
| SSU | Subsatellite Unit |
| SSU | sequential shunt unit |
| SSUM | space segment user manual |
| SSV | Space Service Volume |
| SSVTF | Space Station Verification & Training Facility |
| ST | Space Technologies |
| ST | Senior Scientific and Technical |
| ST | Singapore Thailand |
| ST | Space Technology |
| ST | Space Telescope |
| ST-DCF | Hubble Space Telescope-Data Capture Facility |
| ST7 | Space Technology 7 mission |
| ST; S TKR | star tracker |
| STA | Shuttle Training Aircraft |
| STA | Structural Test Article |
| STACEM | Sttudent Academic Environmental Monitoring |
| STADAN | Satellite Tracking and Data Acquisition Network |
| STANDBY | standby control word |
| STARDUST | Space Dust Analysis Mission |
| STARE | Space-Based Telescope for the Actionable Refinement of Ephemeris |
| STARLink | Satellite Telemetry & Return Link |
| STARS | Space Tethered Autonomous Robotic Satellite |
| STATUS | status field |
| STB | SCaN Testbed |
| STC | star camera |
| STCR | Starboard Thermal Control Radiator |
| STD | Standard Technical Design |
| STDN | Spaceflight Tracking and Data Network |
| STE | Secure Telephone Equipment |
| STEDI | Student Explorer Demonstration Initiative |
| STEM | Science, Technology, Engineering, & Mathematics (Education) |
| STEM | Science, Technology, Engineering and Mathematics |
| STENSAT | Stenhouse Satellite |
| STEP | Space Test Experiment Platform |
| STEP | Space Test Experimental Platform |
| STEP Cube Lab | Space Technology Experimental Projects CubeSat Laboratory |
| STEREO | Solar TErrestrial RElations Observatory |
| STEX | Sensor Technology Experiment |
| STF | Simulation to Flight |
| STGT | Second Tracking and Data Relay Satellite System Ground Terminal |
| STI | Scientific and Technical Information |
| STI | Scientific & Technical Information |
| STIC | Scientific and Technical Information Center |
| STIS | Space Telescope Imaging Spectrometer (to replace FOC & GHRS) |
| STK | Satellite Tool Kit |
| STL | Station Training Lead |
| STM | structural model |
| STM | structural-thermal model |
| STM | structural thermal model |
| STM | star mapper |
| STMD | Space Technology Mission Directorate |
| STMSat | Saint Thomas More Satellite |
| STOCC | Space Telescope Operations Control Center (formerly: HSTOCC,HST Operations Control Center) |
| STOL | Spacecraft Test and Operations Language |
| STP | Space Test Program |
| STP | Solar Terrestrial Probes |
| STP | Short Term Plan |
| STP | SCaN Transition Plan |
| STPS | Software Telemetry Processing System |
| STPSat | Space Test Program Satellite |
| STR | Starboard Thermal Radiator |
| STR | star tracker |
| STRATOS | Safeguarding Thermal Resources Avionics Telecommunications Operations Systems |
| STRB | Safety Technical Review Board (CCP) |
| STRCS | Space Transportation Reimbursable Cost System |
| STRG | Space Technology Research Grants Program |
| STRM | Storage Manager |
| STRR | S/W Transition Readiness Review |
| STRS | Space Telecommunications Radio System |
| STRV | Space Technology Research Vehicle |
| STRaND | Surrey Training Research & Nanosatellite Demonstrator |
| STS | Synchronous Transport Signal |
| STS | Shuttle Transport System (or) Space Transportation System |
| STS | Space Transportation System |
| STSAT | Science & Technology Satellite |
| STSDAS | Space Telescope Science Data Analysis System |
| STSS | Space Tracking & Surveillance System |
| STScI | Space Telescope Science Institute |
| STTR | Small business Technology Transfer |
| STTR | Small Business Technology Transfer Program |
| STTW | Shiyan Tongbu Tongxing Weixing |
| STU | Secure Telephone Unit |
| STV | Soyuz transport vehicle |
| STV | Satellite Test Vehicle |
| STVC | Small fine arm TV Camera (JEMRMS) |
| STel | Stanford Telecommunications Corporation |
| SU | Setup |
| SUBS | Subsequent Flights |
| SUCCESS | Subsonic Contrails and Clouds Effects Special Study |
| SUCHAI | Satellite of the University of Chile for Aerospace Investigation |
| SUP | Standard Utility Panel |
| SUPP | Suppressed |
| SUPRWG | SCaN Users Plans and Requirements Working Group |
| SV | Space Vehicle |
| SV | State Vector |
| SV | Software Variable |
| SV | Schedule (Work) Variance |
| SV | small cavity |
| SVA | Svalbard |
| SVC | Switched Virtual Circuit |
| SVC | Switched Virtual Circuits |
| SVEL | Service Element |
| SVF | software validation facility |
| SVF | Software verification facility |
| SVLBI | Space Very Long Baseline Interferometry |
| SVMF | Space Vehicle Mock-up Facility |
| SVO | Special Vehicle Operations |
| SVS | Switched Voice Service |
| SVS | space vision system |
| SVSA | Single void supply assembly |
| SVT | Science Verification Test |
| SVT | System Validation Test |
| SVT | Supraventricular Tachycardia |
| SVTL | safety verification tracking log |
| SVU | SAP Version Upgrade |
| SW | Software |
| SW | Space Wing |
| SWAP | Size, Weight, and Power |
| SWAPRA | South West Aerospace Professional Representatives Association |
| SWAS | Submillimeter Wave Astronomy Satellite |
| SWCB | Software Control Board |
| SWE | software engineering |
| SWEA | Solar Wind Electron Analyzer |
| SWEU | Software Exchangeable Unit |
| SWF | ShortWave Fading |
| SWFO-L1 | Space Weather Follow-On - Lagrange 1 |
| SWG | Sub-Working Group |
| SWIA | Solar Wind Ion Analyzer |
| SWIR | Short Wave Infrared |
| SWOP | Software Operational Program |
| SWOT | Surface Water & Ocean Topography |
| SWPA | Software Product Assurance |
| SWRU | Software Replaceable Unit |
| SWS | secondary working standard |
| SWSI | Space Network Web Services Interface |
| SXS | High-Resolution Soft X-Ray Spectrometer |
| SYH | Shoulder Yaw Held (control algorithm) |
| SYNC | synchronisation object |
| SYNCH | data bus system synchronization signal |
| SYS | System |
| SYSCON | Systems Controller |
| SZA | Solar Zenith Angle |
| Safir | Satellite for Information Relay |
| Samos | Satellite & Missile Observation System |
| Satcom | Satellite Communication |
| SaudiSat | Saudi Arabian Satellite |
| SciSat | Science Satellite |
| SeaWiFS | Sea-viewing Wide Field-of-view Sensor |
| SeeMe | Space Enabled Effects for Military Engagements |
| Sel | select |
| Seq | sequence |
| SerDes | serialiser-deserialiser |
| Sf | safe |
| Shutdn | shutdown |
| Si, | SiGe silicon, silicon germanium |
| Sig | signal |
| Signe | Solar Interplanetary Gamma Ray Neutron Experiment |
| SimSat | Simulated Satellite |
| Sirio | Satellite Italiano ricerca industriale orientato |
| Sloshsat-FLEVO | Sloshsat Facility for Liquid Experimentation & Verification in Orbit |
| Snapshot | Space Nuclear Auxiliary Power Shot |
| Snsr | sensor |
| SoI | Summer of Innovation |
| SolO | Solar Orbiter |
| Solarmax | Solar Maximum Mission |
| Soln | solution |
| SoloHI | Solar & Heliospheric Imager |
| Solrad | Solar Radiation |
| Solwind | Solar Wind |
| SpG/SG | Specific Gravity |
| SpO2 | O2 Saturatio |
| SpW | SpaceWire |
| SpaceFOM | Space domain FOM (SISO-STD-018-2020) |
| SpaceX | Space Exploration & Technology |
| Sparta | Special Anti-Missile Research Tests, Australia |
| Spartan | Shuttle Pointed Autonomous Research Tool for Astronomy |
| Spect | spectrometer |
| Sply | supply |
| Spot | Satellite Probatoire de l'Observation de la Terre |
| Squirt | Satellite Quick Research Testbed |
| Star-Rad | Starfish Radiation |
| Starlette | Satellite de Taille Adaptée avec Réflecteurs Laser por les Etudes de la Terre |
| Starshine | Student Tracked Atmospheric Research Satellite for Heuristic International Networking Equipment |
| Stat | status |
| Std | Standard |
| Stentor | Satellite de Télécommunications pour Expérimenter les Nouvelles Technologies en Orbite |
| Stratospheric | THz Observatory |
| Struc | structure |
| Suborbital | Payloads: |
| SunRISE | Sun Radio Interferometer Space Experiment |
| Sunsat | Stellenbosch University Satellite |
| Suomi | NPP Suomi National Polar orbiting Partnership, formerly the NPOESS |
| Surcal | Surveilance Calibration |
| SurfSat | Surface charging Satellite |
| Surface | Topography Mission instrument) |
| Surfsat | Summer Undergraduate Research Fellowship Satellite |
| Sv | sievert |
| SwRI | Southwest Research Institute |
| Swift | Swift Gamma Ray Burst Explosion |
| Sync | Synchronizer |
| Sync | synchronize |
| Syncom | Synchroneous Communication |
| T | thermostabilized |
| T | Total toxicity |
| T | takeoff or time |
| T&C | Training & Certification |
| T&C | Telemetry and Command |
| T&CD | Timing and Countdown |
| T&DA | Tracking & Data Acquisition |
| T&E | Test and Evaluation |
| T&R | Transition & Retirement |
| T,Temp | temperature |
| T-LR | The ATV-CC Local Representative in Toulouse |
| T-TSAFE | Terminal-Tactical Separation Assured Flight Environment |
| T-value | Additive toxicity factor |
| T/C | thermal cycling |
| T/L | Timeline |
| T/P | Temperature/Pressure |
| T288 | time to delamination at 288˚C |
| TA | test article |
| TA | acceptance temperature |
| TA | task analysis |
| TA | Task Agreement |
| TA | Technical Authority |
| TAC | Turbo-Alternator/Compressor |
| TACAN | Tactical Air Navigation |
| TACOMSAT | Tactical Communication Satellite |
| TACSAT | Tactical Satellite |
| TAG | Technology Advisory Group |
| TAI | international atomic time |
| TAI | temps atomique international - international atomic time |
| TAL | Transatlantic Abort Landing (Shuttle abort plan) |
| TAL | Transatlantic Abort Landing |
| TAM | test analysis model |
| TAMS | Training Administration Management System |
| TANSTAAFL | There Ain't No Such Thing As A Free Lunch |
| TAOS | Technology for Autonomous Operational Satellite |
| TAP | Tracking Acquisition Processor |
| TAP | Telemetry Acquisition Processor |
| TARS | Test Analysis Retrieval System |
| TARZAN | Total Aerobic Resistive Device in Zero G with Analyzer Network |
| TAS | thermal analysis for space |
| TAS-I | Thales Alenia Space - Italy |
| TASP | Test and Simulation Processor |
| TASS | TDRSS Augmentation Satellite Service |
| TAT | Test Assessment Team (JWST) |
| TATS | Test & Training Satellite |
| TAU | Thousand Astronomical Unit (mission) |
| TAVE | Thor Agena Vibration Experiment |
| TAXI | Transmitter-Receiver Interface |
| TB | thermal balance |
| TBA | To be agreed |
| TBC | To be confirmed/completed |
| TBD | To Be Defined |
| TBD | To be defined/determined |
| TBD | To be determined |
| TBEx | Tandem Beacon Experiment |
| TBI | through bulkhead initiator |
| TBI | through-bulkhead initiator |
| TBIRD | TeraByte InfraRed Delivery |
| TBPC | to be provided by customer |
| TBPM | to be provided by manufacturer |
| TBPU | to be provided by user |
| TBR | To be resolved/reviewed |
| TBR | To Be Resolved |
| TBS | to be supplied |
| TBT | thermal balance test |
| TBW | to be written |
| TC | Technical Committee |
| TC | Test Configuration |
| TC | Telecommand |
| TC | thermal control |
| TC | Tan Ce |
| TC | Thermocouple |
| TCA | Time of Closest Approach |
| TCA | Telemetry Channel Assembly |
| TCA | thrust chamber assembly |
| TCA | Transformational Communications Architecture |
| TCAA | Trace Contaminant Control Assembly |
| TCB | Training Control Board |
| TCC | thermal control coatings |
| TCCS | trace contaminate control subassembly |
| TCD | Training Control Document |
| TCD/CW | Transcranial Doppler/continuous wave |
| TCDS | Telemetry Data Processors |
| TCDT | Terminal Count Down Test |
| TCFEP | Telemetry and Communication Front-End Processor |
| TCG | Thermal Control Group |
| TCH. POC | Technical Point of Contact |
| TCI | Technical Control Instrumentation |
| TCI | technology conformance inspection |
| TCIR | Safety Total Case Incident Rate |
| TCL | Test Configuration List |
| TCM | Trim Correction Maneuvers |
| TCM | Thermal Convection Module |
| TCO | Timeline Change Officer |
| TCOPS | Trajectory Computation and Orbital Products System |
| TCP | Transmission Control Protocol |
| TCP | Transport Control Protocol |
| TCP | Transmission Control Protocol/Processing |
| TCP/IP | transmission control protocol/internet protocol |
| TCR | Telemetry, Command & Ranging |
| TCR | Training Control Room |
| TCS | Transformational Communications System |
| TCS | Thermal Control System |
| TCU | Temperature Controlled Units |
| TCV | technological characterization vehicle |
| TCWG | Technical Capability Working Group |
| TD | Thor Delta |
| TD | transfer device |
| TD | Technical Direction |
| TDA | Target Docking Adaptor |
| TDA&C | Telemetry, Data Acquisition, and Command |
| TDAC | Tracking, Data Acquisition, and Command |
| TDD | Task Description Document |
| TDD | Technical Description Document |
| TDE | Technology Development Element |
| TDEM | Technology Development for Exoplanet Missions |
| TDF | TPOCC Development Facility |
| TDF | Télédiffusion de France |
| TDI | time delay integration |
| TDK | transport device kit transport device |
| TDM | time‐division multiplexed |
| TDM | Time Division Multiplexing |
| TDMA | Time Division Multiple Access |
| TDP | technical data package |
| TDR | time domain reflectometer |
| TDR | time domain reflectometry |
| TDR | Top Directorate Risk |
| TDRS | Tracking & Data Relay Satellite |
| TDRS | Tracking and Data Relay Satellite |
| TDRS-E | Tracking and Data Relay Satellite – East |
| TDRSS | Tracking and Data Relay Satellite System |
| TDRSS | Tracking & Data Relay Satellite System |
| TDS | Technology Demonstration Satellite |
| TDS | Time Distribution System |
| TDS | Tracking Data System |
| TDSD | TDRS Digital Signal Distribution |
| TE | Tris-EDTA, 2-Amino-2-(hydroxymethyl)propane-1,3-diol ethylenediaminetetraacetic acid |
| TEA | Torque Equilibrium Attitude |
| TEAMSAT | Technology education Experiment Added To MAQSat |
| TEB | Tender Evaluation Board |
| TEC | thermos-electric cooler |
| TECCS | Test and Evaluation Command and Control System |
| TED | triple error detection |
| TEF | thermal electric freezer |
| TEG | turbine exhaust gases |
| TELCU | Thermal Electric Liquid Cooling Unit |
| TELEOP PNL | teleoperator control panel |
| TELOPS | Telemetry On-line Processing System |
| TEM | transverse electromagnetic mode |
| TEMPEST-D | Temporal Experiment for Storms & Tropical Systems - Demonstrator |
| TEP | Tender Evaluation Panel |
| TEPAD | Test Equipment for Payload & Development |
| TEPC | tissue equivalent proportional counter |
| TEPCE | Tether Electrodynamics Propulsion CubeSat Experiment |
| TERRA | A Spacecraft formerly called Earth Observing Spacecraft (EOS) AM-1 |
| TERRIERS | Tomographic Experiment using Radiative Recombinative Ionospheric EUV and Radio Sources |
| TERRIERS | Topographic Experiment using Radiative Recombinative Ionospheric EUV & Radio Sources |
| TES | Thermal Energy Storage |
| TES | Transform Spectrometer |
| TES | Technology Experiment Satellite |
| TES | Test Execution Software |
| TES | Thermal Emission Spectrometer (on Mars Observer) |
| TES | Tropical Emission Spectrometer |
| TESS | Temporary Early Sleep Station |
| TESS | Transiting Exoplanet Survey Satellite |
| TEV | Test Evaluation Software |
| TEX | Transceiver Experiment |
| TF | test fixture |
| TF | Tool Fixture |
| TF-FGI | Total force foot-ground interface device |
| TF-FGI | Total Force-Foot Ground Interface device (a force measuring insole worn in the shoe) |
| TFCR | Training Flight Control Room |
| TG | Triglycerides |
| TG | Task Group |
| TGA | thermo gravimetry analysis |
| TGA | thermal gravimetric analysis |
| TGA | thermo gravimetric analysis |
| TGA | Thioglycollate Agar |
| TGA | Telemetry Group Controller |
| TGF | Translation Grasping Fixture |
| TGO | Trace Gas Orbiter |
| TGT | TDRSS Ground Terminal |
| TH | TransHab |
| THA | Tool Holster Assembly (SPDM) |
| THA | Thermostat Housing Assembly |
| THB | temperature humidity bias |
| THC | temperature & humidity control |
| THC | translational hand controller |
| THEMIS | THermal EMission Imaging System (on Mars 2001 Odyssey) |
| THEMIS | Time History of Events & Macroscale Interactions during Substorms |
| THEOS | Thai Earth Observation System |
| THERE | TDRSS High-rate Equipment Replacement and Enhancement |
| THOR | Thermal Operations & Resources Officer |
| TIA | Technical Implementation Agreement |
| TID | total ionising dose |
| TID | total ionizing dose |
| TIDL | total ionizing dose level |
| TIDS | total ionizing dose sensitivity |
| TIFF | tagged image file format |
| TIG | time of ignition |
| TIG | tungsten inert gas (welding) |
| TIG | tungsten inert gas |
| TILT | TDRSS Internet Link Terminal |
| TIM | Technical Interchange Meeting |
| TIM | Technical Interface Meeting |
| TIMED | Thermosphere, Ionosphere, Mesosphere, Energetics and Dynamics |
| TIMS | Thermal Infrared Multispectral Scanner |
| TIMWOOD | Transportation, Inventory, Motion, Waiting, Overprocessing, Overproduction, Defects |
| TIN | Taxpayer Identification Number |
| TINYSCOPE | Tactical Imaging Nanosat Yielding Small-Cost Operations for Persistent Earth-coverage |
| TIOP | TIPIT Input/Output Port |
| TIP | Transition and Implementation Planning |
| TIP | Telemedicine instrumentation pack |
| TIP | Transit Improvement Program |
| TIPIT | TDRSS Interface Preprocessor Into the TELOPS |
| TIPLAB | Technical Information Program Laboratory |
| TIROS | Television InfraRed Observation Satellite |
| TIROS | Television Infrared Observational Satellite |
| TIRS | Thermal Infrared Sensor |
| TISA | Time Interpolation and Spatial Averaging |
| TIU | Thermal Interface Unit (JEF) |
| TIV&V | Transition, Integration, Verification, and Validation |
| TJ3Sat | Thomas Jefferson Cube Satellite |
| TJREVERB | Thomas Jefferson High School for Science & Technology Research & Education Vehicle for Evaluating Radio Broadcasts |
| TKS | tracking system |
| TKS | Transportnaya Korabl Snabsheniya |
| TKSC | Tsukuba Space Center |
| TKUP | TDRS K-Band Upgrade Project |
| TL | Team Leader |
| TL | Timeline |
| TL-UI | Top Level User Interface |
| TLA | Three Letter Acronym |
| TLAN | TPOCC Local Area Network |
| TLAS | TDRSS Look Angle System |
| TLC | Trans Lunar Cruise |
| TLC | Total Lung Capacity |
| TLC | Taxi-to-LAN Converter |
| TLD | thermoluminescent detector |
| TLD | Titan Launch Dispenser |
| TLE | Two Line Element |
| TLI | Trans Lunar Injection |
| TLM | Telemetry |
| TLO | Technical Liaison Officer |
| TLS | Transfer Layer Security |
| TLS | Transport Layer Security |
| TLV | threshold limit value |
| TLYF | Test Like You Fly |
| TM | traffic model |
| TM | transport spacecraft, modified |
| TM | Technical Monitor |
| TM | Telemetry |
| TM | Technical Memorandum |
| TM | multiplier,torque m. |
| TM | Thematic Mapper |
| TM&TC | telemetry/telecommand |
| TM/TC | telemetry, telecommand |
| TM/TC | telemetry/telecommand |
| TMA | thermomechanical analysis |
| TMA | Telemetry Annex |
| TMA | Torque Motor Assembly |
| TMAZ | thermo mechanically affected zone |
| TMI | TRMM Microwave Imager |
| TML | total mass loss |
| TMM | thermal mathematical model |
| TMOC | TOMS-EP Mission Operations Center |
| TMOD | Telecommunications and Mission Operations Directorate (JPL) |
| TMP | Travel Manager Plus |
| TMP | Technology Management Plan |
| TMR | Technical Manager’s Representative |
| TMR | Technical Management Representative |
| TMS | Telecommunication and Mission System |
| TMSat | Thai Microsatellite |
| TMT | Technology Management Team |
| TN | Technical Note |
| TND | Tender Notification Document |
| TNF | Test Notification Form |
| TNID | total non-ionising dose |
| TNID | total non-ionizing dose |
| TNIDL | total non-ionizing dose level |
| TNIDS | total non-ionizing dose sensitivity |
| TNOC | TDRS Network Operations Control |
| TNOp | non‐operating temperature |
| TO | Thai Oscar |
| TOC | Table of Content |
| TOCC | TDRS Operations Control Center |
| TOCC | TDRSS Operations Control Center |
| TOF | Time of Flight |
| TOFF | Time OFF |
| TOGA | Tropical Ocean Global Atmosphere |
| TOL | transport operations leader |
| TOMS | Total Ozone Mapping Spectrometer |
| TOMS-EP | Total Ozone Mapping Spectrometer - Earth Probe |
| TON | Time ON |
| TOPEX | The Ocean Topography Experiment |
| TOPO | Trajectory Operations Officer |
| TOPS | Toward Other Planetary Systems |
| TOR | TPOCC Operations Room |
| TORRA | Trajectory Operations for Rendezvous R-bar approach |
| TORVA | Trajectory Operations for Rendezvous V-bar approach |
| TOS | Tiros Operational Satellite |
| TOS | Transfer Orbit Stage |
| TOTS | Transportable Orbital Tracking Station |
| TOTS | Transportable Orbital Tracking System |
| TP | technology plan |
| TP/PTP | Tactical Planning / Payload Tactical Planning |
| TPA | tissue plasminogen activator |
| TPC | Technical Performance Commitments |
| TPCE | Telemetry Processing Control Environment |
| TPDO | transmit PDO |
| TPF | Telemetry Processing Facility |
| TPHTE | two-phase heat transport equipment |
| TPI | maneuver,Terminal Phase Initiation (maneuver) |
| TPI | Terminal Phase Initiation (maneuver) |
| TPL | Transfer Priority List |
| TPL | two-phase loop |
| TPM | Technical Performance Metrics |
| TPM | Technical Performance Measure |
| TPOCC | Transportable Payload Operations Control Center |
| TPR | Top Program Risk |
| TPRO | test procedure |
| TPS | Thermal Protection System |
| TPS | Technical Publishing Software ( Interleaf) |
| TPWG | Tactical Planning Working Group |
| TProjR | Top Project Risk |
| TQ | qualification temperature |
| TQ&V | Training, Qualification & Validation |
| TQCM | Thermal (electrically cooled) Quartz Crystal Microbalance |
| TQM | Total Quality Management |
| TQP | Training & Qualification Plan |
| TQVS | Training, Qualification & Validation Subsystem |
| TQVS | Training Qualification & Validation System |
| TQVS | Training, Qualification & Validation System |
| TR | test review |
| TR | Transition Readiness |
| TR | tracking |
| TR | Tape Recorder |
| TR | Transition Review |
| TRA | technology readiness assessment |
| TRAAC | Transit Research & Attitude Control |
| TRAC | Targeting and Reflective Alignment Concept |
| TRACE | Transition Region & Coronal Explorer |
| TRACE | Transitional Region and Coronal Explorer |
| TRACE DPS | Transitional Region and Coronal Explorer Data Processing System |
| TRACERS | Tandem Reconnection & Cusp Electrodynamics Reconnaissance Satellites |
| TRAPS | Telemetry & Radar Acquisition Processing Systems |
| TRB | test review board |
| TRB | technology review board |
| TRC | transmitter/receiver/controller |
| TRDS | Technical Requirements Data Set |
| TRE | Columbus Trainer Europe |
| TRL | Technology Readiness Level |
| TRM | Training Model |
| TRMM | Tropical Rainfall Measuring Mission |
| TRP | Technology Research Programme |
| TRPT | test report |
| TRR | test results review |
| TRR | Training Readiness Review |
| TRR | test readiness review |
| TRRJ | thermal radiator rotary joint |
| TRS | Tetrahedral Research Satellite |
| TRS | Test Record Sheet |
| TRSL | technology readiness status list |
| TRU | Columbus Trainer USA |
| TRU | truss,Truss |
| TRYAD | Terrestrial Rays Analysis & Detection |
| TReK | Telescience Resource Kit |
| TS | technical specification |
| TS | technical requirement specification |
| TS | technical requirements specification |
| TS | tool stanchion |
| TSA | Trypticase Soy Agar |
| TSA | Transportation Security Agency |
| TSA | Telemetry Simulator Assembly |
| TSB | TTE Switch Board |
| TSB | Technical Support Building |
| TSC | Telescience Support Center |
| TSC | Technical Subcommittee (under the IRAC) |
| TSCV | Test Setup, Configuration & Verification software |
| TSD | Technology and Standards Development Division |
| TSDIS | Time Sensitive Data Information System |
| TSDIS | TRMM Science Data & Information System |
| TSH | triaxial sensor heads |
| TSH | Thyroid Stimulating Hormone |
| TSM | temperature sensors monitor |
| TSMU | Tail Service Mast Umbilical |
| TSO | Technical Support Office |
| TSO | TTE Switching Unit |
| TSOP | thin small outline package |
| TSP | Time & Space Partitioning |
| TSPE | test specification |
| TSR | TDRS Scheduling Request |
| TSS | Targeted Search System |
| TSS | Tethered Satellite System |
| TSS | Time Synchronization Software |
| TSSF | Tape Staging and Storage Facility |
| TSTO | Two Stage To Orbit (also 2STO) |
| TSX | Tri-Service Experiment |
| TT | Trouble Ticket |
| TT&C | Telemetry, Tracking and Command |
| TT&C | Tracking Telemetry & Command (flight) |
| TTAC | Transportable Telemetry and Command |
| TTC | telemetry, tracking & telecommand |
| TTCP | Transport Technology Communication Protocol |
| TTCP | Technology Transfer Control Protocol |
| TTE | TT Ethernet |
| TTR | Time to Restore |
| TTR | TDRSS Trouble Report |
| TTS | Test & Training Satellite |
| TUBIN | Technische Universität Infrared Nanosatellite |
| TURFTS | TDRSS User Radio Frequency Test Set |
| TUS | trailing umbilical system |
| TUT | TDRSS Unused Time |
| TV | Test and Verification |
| TV | thermal vacuum |
| TV | television |
| TV-Test | thermal-vacuum test |
| TVA | Thermal Variation Analysis |
| TVAC | thermal vacuum chamber |
| TVC | thrust vector control |
| TVD | Torque-velocity dynamometer |
| TVE | Thrusted Vector Experiment |
| TVG | Transfer Vehicles Group |
| TVG | Transfer Vehicle Group |
| TVIS | Treadmill Vibration and Isolation System |
| TVOC | Television Operations Center |
| TVVR | Technical Verification & Validation Review |
| TWG | Technology Working Group |
| TWINS | Two Wide–angle Imaging Neutral–atom Spectrometers |
| TWMV | three-way mix valve |
| TWP | Transition Work Plan |
| TWPV | Three Way Proportioning Valve |
| TWT | Traveling Wave Tube |
| TWT | travelling wave tube |
| TWTA | Traveling Wave Tube Amplifier |
| TWTA | travelling wave tube amplifier |
| TX | transmit |
| TX_EN | transmit enable |
| Tb | talkback |
| TechEdSat | Technical & Educational Satellite |
| TechSat-21 | Technology Satellites for the 21st Century |
| Techsat | Technology Satellite |
| Temisat | Telespazio Micro Satellite |
| Term | terminate |
| Tg | temperature of glass transition |
| Tg | glassivation temperature |
| Tgt,Trgt | target |
| ThEL | Thermal Equipment List |
| Therm | thermal |
| Thold | threshold |
| TiPS | Tethers in Space Physics Satellite |
| Timation | Time Navigation |
| Tj | junction temperature |
| Tjmax | absolute maximum rated junction temperature |
| Tk | tank |
| Tmin | minimum actuator torque required |
| ToD | true of date |
| ToR | Terms of Reference |
| Tol | tolerance |
| Top | operating temperature |
| TopSat | Tactical Optical Satellite |
| Topo | Topographic Position Satellite |
| Tot | total |
| TrM | trainer mock-up |
| Traj | trajectory |
| Transat | Transit & SATRACK / Translation Satellite |
| Transtage | Transfer Stage |
| TreK | Telescience Remote Experiment Kit |
| Trk | track |
| Trq | torque |
| TsUP | Tsentr Upravleniya Poletom (also ZUP) |
| TsUP (???) | ????? ?????????? ??????? (Mission Control Center Moscow) |
| Tubsat | Technische Universität Berlin Satellit |
| Tx | transmitter |
| U-NII | Unlicensed National Information Infrastructure Devices |
| U.S. | United States |
| U.S.C. | United States Code |
| U/L; Uplk | uplink |
| UA | Uric Acid |
| UA | Utility Annex |
| UAB | CBSE University of Alabama at Birmingham Center for Biological Sciences and |
| UAESA | United Arab Emirates Space Agency |
| UAF | University of Alaska Fairbanks |
| UAG | Users’ Advisory Group |
| UAR | Unit Acceptance Review |
| UARS | Upper Atmosphere Research Satellite |
| UAS | Unmanned Aircraft Systems |
| UAS | Unmanned Aeronautical Systems |
| UAT | unit acceptance test |
| UAV | Unmanned Aerial Vehicle |
| UAV | Unmanned Aerial Vehicles |
| UB | Undistributed Budget |
| UBM | Unpressurized Berthing Mechanism |
| UBR | Unspecified Bit Rate |
| UCA | Umbilical Connector Assembly (UC UCB) |
| UCAR | University Corporation for Atmospheric Research |
| UCAV | Unmanned Combat Air Vehicle |
| UCB | Urine containment bag |
| UCB | Umbilical Connector Block (JAL) |
| UCCAS | unpressurized cargo carrier attachment system |
| UCCAS | Unpressurized Cargo Carrier Attach System |
| UCD | Urine collection device |
| UCK | Urine collection kit |
| UCL | User Control Language |
| UCLA | University of California at Los Angeles |
| UCLSat | University College London Satellite |
| UCM | Umbilical Connector Manifold (JAL) |
| UCP | Unpressurized Cargo Pallet (ICC part) |
| UCRD | Uplink Configuration Requirements Document |
| UCS | ultrahigh frequency communication system |
| UCSS | UARS CDHF Software System |
| UD | uni-directional |
| UDC | Utilization Development Capability |
| UDG | User Data Generation only |
| UDM | Universal Docking Module |
| UDMH | Unsymmetrical DiMethyl Hydrazine |
| UDP | User Datagram Protocol |
| UDS | Universal Documentation System |
| UELV | Unmanned Expendable Launch Vehicle |
| UERE | User Equivalent Range Error |
| UF | utilization flight |
| UFO | Unidentified Flying Object |
| UFO | Ultra High Frequency Follow On |
| UFR | UnFunded Requirements |
| UGC | Uppsala General Catalog |
| UHB | User Home Base |
| UHD | User Help Desk |
| UHF | Ultra High Frequency |
| UHF | Ultra-High Frequency |
| UHF-FO | Ultra High Frequency Follow On |
| UI | User Interface |
| UI | unit interval |
| UIA | Umbilical Interface Assembly (JAL) |
| UIB | Utilisation Integration Board |
| UIP | Utility Interface Panel |
| UIT | Ultraviolet Imaging Telescope (Astro package) |
| UK | United Kingdom |
| UKS | United Kingdom Subsatellite |
| UKSA | United Kingdom Space Agency |
| UKST | United Kingdom Schmidt Telescope |
| ULA | United Launch Alliance |
| ULA | Unified Labor Account |
| ULC | unpressurized logistics carrier |
| ULCAS | upper ULC attachment system |
| ULF | Utilization & Logistics Flight |
| ULF | Utilization Logistics Flight |
| ULPA | ultra-low-particle air filter |
| UM | user manual |
| UM | UARS Missions |
| UMA | University of Massachusetts |
| UMA | umbilical mechanism assembly |
| UMB | Umbilical |
| UMD | University of Maryland at College Park |
| UMDB | User Mission Data Base |
| UMI | Universal Measurement Identifier |
| UML | unified modelling language |
| UML | universal modelling language |
| UMM | USOC Manager’s meeting |
| UMP | Utilization Management Plan |
| UMS | Utilization and Mission Services |
| UN | United Nations |
| UNECE | United Nations Economic Commission for Europe |
| UNEX | University Explorers |
| UNEX | University Explorer |
| UNI | User to Network Interface |
| UNIFORM | University International Formation Mission |
| UNITE | Undergraduate Nano Ionospheric Temperature Explorer |
| UNITeS | Unified NASA Information Technology Services |
| UNOSAT | Undergraduate Orbital Student Satellite |
| UNPS | Universal Power Supply |
| UNSCEAR | United Nation’s Scientific Committee on the Effects of Atomic Radiation |
| UO | UoSat Oscar |
| UOA | User Operations Area |
| UOF | User Operated Facility |
| UON | Universal Operations Network |
| UOP | Utility Outlet Panel |
| UP | urine processor |
| UPD | User Performance Data |
| UPMSat | Universidad Politécnica de Madrid Satellite |
| UPN | Unique Project Number |
| UPN | Universal Product Number |
| UPOWG | Utilization Payload Operations Working Group |
| UPS | Uninterruptible Power Supply |
| UPS | User Planning System |
| UPSat | UUniversity of Patras Satellite |
| UQPSK | Unbalanced Quadrature Phase-Shift Keying |
| UQPSK | unbalanced quadrature phase shift keying |
| URC | University Research Centers |
| URD | User Requirements Document |
| UREA | Urea |
| URI | Uniform Resource Identifier |
| URL | Uniform Resource Locator |
| URSA MAIOR | University of Rome la Sapienza Micro Attitude In Orbit testing |
| URSI | Union Radio Science Internationale |
| US | Upper Stage |
| US | United States |
| US-A | Upravlenniye Sputnik Aktivny |
| US-K | Upravlenniye Sputnik K... |
| US-KMO | Upravlenniye Sputnik K... M... O... |
| US-KS | Upravlenniye Sputnik K... S... |
| US-P | Upravlenniye Sputnik Passivny |
| US-PM | Upravlenniye Sputnik Passivny Modifikirovanny |
| USA | United Space Alliance |
| USA | User Service Access |
| USA | United States of America |
| USAF | United States Air Force |
| USAID | U.S. Agency for International Development |
| USB | Unified S-Band |
| USC | United States Code |
| USCCS | User Spacecraft Clock Calibration Service |
| USCG | United States Coast Guard |
| USDA | United States Department of Agriculture |
| USDA | U.S. Department of Agriculture |
| USE | Upper Stage Engine |
| USERS | Unmanned Space Experiment Recovery System |
| USFS | U.S. Flywheel Systems, Inc. |
| USG | United States Government |
| USGCRP | U.S. Global Change Research Program |
| USGS | United States Geological Survey |
| USGS | U.S. Geological Survey |
| USL | United States Laboratory |
| USM | Unit of Service Metric |
| USM | Utilization Service Metrics |
| USM | Universalny Stikovochny Modul' |
| USMP | U.S. Microgravity Payload |
| USMP | United States Microgravity Payload |
| USN | United States Navy |
| USNA | United States Naval Academy |
| USNO | United States Naval Observatory |
| USOC | User Support Operations Center |
| USOC | User Support & Operations Centre |
| USOC | United States Operations Center |
| USOC | User Support & Operations Center |
| USOS | US Orbital Segment |
| USOS | U.S. On-orbit Segment (ISS) |
| USOS | United States Orbital Segment |
| USOS | U.S. on-orbit segment |
| USOS | US On-orbit Segment |
| USPI | U.S. Participating Investigators (Explorer) |
| USRA | Universities Space Research Association |
| USS | User Services System |
| USS | User Support Software |
| USS | Unified Synoptic System |
| USS-CR | User Services Segment Component Replacement |
| USSA | US standard atmosphere |
| USSPACECOM | United States Space Command |
| USSR | User Service Subsystem Replacement |
| UST | Universal Space Transponder |
| USTAG | U.S. Technical Advisory Group |
| USUM | United States Utilization Module |
| UT | Universal Time (a.k.a. GMT, or Zulu Time cf UTC) |
| UTA | utility transfer assembly |
| UTAS | Universal Trunnion Attachment System (ESP attach point) |
| UTC | Coordinated Universal Time (subtly different from UT) |
| UTC | Universal Time Coordinated |
| UTC | Universal Time Coordinated; Coordinated Universal Time |
| UTC | Coordinated Universal Time |
| UTDF | Universal Tracking Data Format |
| UTELOPS | Upgraded Telemetry On-line Processing System |
| UTS | ultimate tensile strength |
| UUID | Universally Unique IDentifier |
| UV | Ultraviolet |
| UVA | ultra-violet (310 nm - 400 nm) |
| UVP | undervoltage protection |
| UVR | Ultra Violet Radiometer |
| UVS | UltraViolet Spectrometer |
| UWB | Ultra-Wideband Systems |
| UWE | University of Würzburg's Experimental satellite |
| UWI | Unique Work Instruction |
| Ull | ullage |
| Unisat | University Satellite |
| Univ | universal |
| Unlk | unlock |
| UoSat | University of Surrey Satellite |
| V&V | Verification & Validation |
| VA | Vozvrachaemaya Apparat |
| VAB | Vertical Assembly Building |
| VAB | Vehicle Assembly Building (formerly Vertical Assembly Building) |
| VABR | Vertical Assembly Building Repeater |
| VAC | Volts,Alternating Current |
| VAC | Variance at Completion |
| VAC | Vertical Assembly Center |
| VAFB | Vandenberg Air Force Base |
| VAL | value definition language |
| VAMPIR | Video Management Room |
| VAMS | Video/Audio Mastering System |
| VAO | Virtual Astronomical Observatory |
| VAR | Variance Analysis Report |
| VAR | Vehicle Assessment Review |
| VASIMAR | variable specific impulse magnetoplasma rocket |
| VASS | ViTS Automated Scheduling System |
| VAX | virtual architecture extendable |
| VAX | Virtual Address Extension |
| VB | Visual Basic |
| VB | Video Booth |
| VBQC | vacuum balance quartz crystal |
| VBQC | vacuum balance quartz contamination |
| VBR | Variable Bit Rate |
| VBSP | video baseband signal processor |
| VC | Virtual Channel |
| VC | Vital capacity |
| VC/MC | Virtual Channel/Master Channel |
| VCA | Video Camera Assembly |
| VCB | virtual channel buffer |
| VCB | verification control board |
| VCC | Virginia CubeSat Constellation |
| VCC | Video Control Center |
| VCD | vapor compression distillation |
| VCDU | Virtual Channel Data Unit |
| VCE | collector-emitter voltage |
| VCHP | variable conductance heat pipe |
| VCI | Virtual Channel Identifier |
| VCID | Virtual Channel Identifier |
| VCL | Vegetation Canopy Lidar |
| VCM | volatile condensable material |
| VCMS | video commanding & measuring system |
| VCP | Verification Control Plan |
| VCP | Vehicle Control Procedure |
| VCP | Virtual Channel Packet |
| VCR | Video Cassette Recorder |
| VCRS | Video Conference Request System |
| VCSA | Video Camera Support Assembly |
| VCSEL | vertical cavity surface emitting laser |
| VCU | Vehicle Control Unit |
| VDA | Vacuum Deposited Aluminium |
| VDD | Version Description Document |
| VDI | Vehicle Data Items |
| VDIFF | voltage differential |
| VDIFF-PK | voltage differential peak |
| VDIFF-PK-PK | voltage differential peak to peak |
| VDM | videometer |
| VDMS | Voice Distribution Management System |
| VDPU | Video Distribution & Processing Unit |
| VDPU | Video Data Processing Unit |
| VDRL | Venereal Disease Research Laboratory (test) |
| VDS | Viking Dynamic Simulator |
| VDS | Voice Distribution System |
| VDS | video distribution system |
| VDT | visual damage threshold |
| VE | Video Equipment |
| VE | virtual environment |
| VE A | Video Equipment,Aft (assembly) |
| VE F | Video Equipment,Forward (assembly) |
| VEEGA | Venus-Earth-Earth Gravity Assist (Galileo flight path) |
| VEH; Veh | vehicle |
| VEP | Vehicle Evaluation Payload |
| VES | vacuum exhaust system |
| VESTA | Vision-based Electro-optical Sensor Tracking Assembly |
| VET | Vehicle Engineering Team |
| VFT | Vehicle Familiarization Tour |
| VGA | Verification Gas Assembly |
| VGA | Venus Gravity Assist |
| VGR | Voyager |
| VHA | Vehicle Holding Attitude |
| VHDL | vhsic hardware description language |
| VHF | Very High Frequency |
| VHSIC | very high speed integrated circuit |
| VIC | Vehicle Insight & Control |
| VICOS | Verification, Integration & Checkout Software |
| VIF | Vibration Isolation Frame |
| VIIRS | Visible Infrared Imaging Radiometer Suite |
| VIIRS | Visible-Infrared Imager Radiometer Suite (NPOESS Preparatory Project instrument) |
| VIS | Voice Intercom Subsystem |
| VISSR | Visible and Infrared Spin Scan Radiometer |
| VITO | Vehicle Integration Test Office |
| VITS | Video Teleconferencing System |
| VITT | Vehicle Integration Test Team |
| VKK | Vozdushno Kosmicheskiy Korabl |
| VL | Virtual Link |
| VLA | Very Large Array |
| VLA | Verification Load Analysis |
| VLAN | Virtual LAN |
| VLBA | Very Long Baseline Array |
| VLBI | Very Long Baseline Interferometry |
| VLF | Very Low Frequency |
| VLRS | Vehicle-Level Reasoning System |
| VLSI | very large scale integration |
| VLT | Very Large Telescope |
| VM | Virtual Machine |
| VMC | Vehicle Mission Computer |
| VMDB | vehicle master data base [?] |
| VMDB | Vehicle Master Data Base |
| VME | Virtual Memory Extension |
| VMK-II | Video MarK II |
| VML | voltage mode logic |
| VMN | Video Monitor |
| VMS | Vertical Motion Simulator |
| VMS | Virtual Memory System |
| VMU | Video Management Unit |
| VN | virtual network |
| VNIR | Visible & Near Infrared |
| VNREDSat | Vietnam Natural Resources, Environment & Disaster monitoring Satellite |
| VO2max | Maximum oxygen consumption |
| VOA | volatile organic analyzer |
| VOIR | Venus Orbiting Imaging Radar (superseded by VRM) |
| VON | Virtual On Net |
| VOR | Vestibulo-ocular reflex |
| VOR | Vehicle Operations Room |
| VOTE | Virtual Operations Training Environment |
| VOX | voice operated transmission (keying) |
| VP | Virtual Path |
| VPF | Vertical Processing Facility |
| VPI | Virtual Path Identifier |
| VPMP | Vented Payload Mounting Plate |
| VPN | Virtual Private Network |
| VPR | Vehicle Power Retry |
| VPU | Virtual Processing Unit |
| VRA | volatile removal assembly |
| VRM | Venus Radar Mapper (now called Magellan) |
| VRML | Virtual Reality Modeling Language |
| VRPT | verification report |
| VS | vacuum system |
| VSAT | Very Small Aperture Terminal |
| VSE | Vision for Space Exploration |
| VSI | Vehicle Systems Integration |
| VSM | Value Stream Mapping |
| VSM | Vehicle System Manager |
| VSOP | Very Large Baseline Interferometry Space Observatory Programme |
| VSOP | VLBI Space Observatory Program |
| VSR | vacuum resource system |
| VSS | Voice Switching System |
| VSSA | Video System Support Assembly |
| VSSA | Video Station Support Assembly |
| VSU | video switch unit |
| VSUME | VHF Spectrum Utilization Measurement Experiment |
| VSW | Video Switcher (JEF) |
| VSWR | voltage standing wave ratio |
| VTC | Video Teleconferencing |
| VTC | Vital Telemetry & Telecommand Controller |
| VTC | Vital Telemetry & Command Controller |
| VTCB | Vitrociset Belgium Sprl Transinne (Belgium) |
| VTCC | Video Teleconferencing Control Center |
| VTHL | Vertical Takeoff Horizontal Landing |
| VTM | Validation Tracking Matrix |
| VTR | Video Tape Recorder |
| VTS | vacuum thermal stability |
| VTVL | Vertical Takeoff Vertical Landing |
| VUV | vacuum ultra violet |
| VV | Visiting Vehicle |
| VVA | Vacuum Vent Assembly |
| VVC | Virtual ViTS Connection |
| VVO | Visiting Vehicle Officer |
| VVT | target,visual video target (installed on ATV) |
| VVT | Visual Video Target |
| VVT | Visual Video Target (installed on ATV) |
| VZA | Viewing Zenith Angle |
| V_DC; VDC | volts direct current; volts DC |
| Vac | vacuum |
| Vbar | velocity vector |
| Vbus | bus voltage |
| Vega | Venera Gallei |
| Venµs | Vegetation & Environment Monitoring New Micro-Satellite |
| Ver | verify |
| Vert | vertical |
| ViDS | Video Distribution & Conferencing Subsystem |
| ViTS | Video Teleconferencing Service/System |
| Vibe | vibration |
| VitaSat | Volunteers in Technical Assistance Satellite |
| Vmp | maximum power voltage |
| VoCS | Voice Conferencing Subsystem |
| VoCS | Voice Conferencing System |
| VoCS | Voices Conferencing System |
| VoCS | Voice Communication System |
| VoCS | Voice Communication Subsystem |
| VoTS | Voice Teleconferencing Service/System |
| Voc | open-circuit voltage |
| Vol | Volume |
| Volcam | Volcanic Ash Mission |
| Vop | operational voltage |
| Vout | output voltage |
| Vrms | voltage root mean square |
| Vtest | test voltage |
| W/G | Working Group |
| W/S | workstation |
| W/U | Wakeup |
| WA | Workmanship Assurance |
| WAAS | Wide Area Augmentation System |
| WAC | WRC Advisory Committee |
| WAD | Work Authorization Document |
| WAN | Wide Area Network |
| WAP | Wireless Access Point |
| WARP | Wideband Advanced Recorder Processor |
| WART | White Sands Auxiliary Remote Tracking |
| WART | WSC Alternate Relay Terminal |
| WASP | Weightless Analysis Sounding Probe |
| WAT | wafer acceptance testing |
| WATR | Western Aeronautical Test Range |
| WATT | Web Application for Telemetry & Tracking |
| WAVE | WWW, Artificial Intelligence, and Virtual Environments Exploration |
| WBC | Wide Band Correlator |
| WBS | work breakdown structure |
| WCA | worst-case analysis |
| WCA | worst case analysis |
| WCB | Wide Channel Bandwidth |
| WCF | Working Capital Fund |
| WCRP | World Climate Research Program |
| WCS | Water Cooling System |
| WD | White Dwarf |
| WDR | Wet Dress Rehearsal |
| WDU | Window Definition Utility |
| WE WISH | World Environmental Watching & Investigation from Space Height |
| WEEE | waste electrical & electronic equipment |
| WEOS | Whale Ecology Observation Satellite |
| WEST | Wide-beam European Satellite Telecominication |
| WESTPAC | Western Pacific Laser Tracking Network Satellite |
| WETA | Wireless video system External Transceiver Assy |
| WFC | Wide Field Camera |
| WFF | Wallops Flight Facility |
| WFF | Wallops Flight Facility (NASA, managed by GSFC) |
| WFI | water for injection |
| WFIRST | Wide-Field Infrared Survey Telescope |
| WFOV | Wide Field of View |
| WFPC | Wide Field / Planetary Camera (on HST) |
| WFPCII | Replacement for WFPC |
| WFR | Weibull failure rate |
| WFSV | Water Flow Selection Valve |
| WG | Working Group |
| WGCCRE | Working Group on Cartographic Coordinates & Rotational Elements |
| WGD | Water & Gas Delivery |
| WGS | Wideband Gapfiller Satellite |
| WGS | Wallops Ground Station |
| WHC | Waste & Hygiene Compartment |
| WI | Work Instruction |
| WIF | worksite interfaces |
| WIF | interface,worksite i. |
| WIMS | Workforce Integrated Management System |
| WIN SCAT | Windows Spaceflight Cognitive Assessment |
| WINDS | Wideband InterNetworking engineering test & Demonstration Satellite |
| WIP | Work In Progress |
| WIRE | Wide-Field Infrared Explorer |
| WIRE | Wide Field Infra Red Explorer |
| WISE | Wide Field Infrared Survey Explorer |
| WISP | Wisconsin Imaging Survey Polarimeter |
| WIT | Windows & Tunnel |
| WIYN | Wisconsin / Indiana / Yale / NOAO telescope |
| WLG | Working Level Group |
| WLG-E | Working Level Group – Engineering Analysis and Technical Assessments |
| WLP | Weekly Look-Ahead Plan |
| WLP | Wallops Island |
| WLP | Week Long Plan |
| WLPS | Wallops |
| WM | waste management |
| WMAP | Wilkinson Microwave Anisotropy Probe |
| WMK | water microbiology kit: |
| WMK | water microbiology kit |
| WMM | world magnetic model |
| WMO | World Meteorological Organization |
| WMS | Web Mapping Service |
| WMSR | Weekly Mission Status Report |
| WO | Weber Oscar |
| WOCA | worst case analysis |
| WOOV | Water On / Off Valve |
| WORF | window observational research facility |
| WOSB | Woman-Owned Small Business |
| WOTIS | Wallops Orbital Tracking Information System |
| WOTS | Wallops Orbital Tracking Station/System |
| WP | work package |
| WP | Waypoint |
| WP | Working Party |
| WP4A | Working Party 4A – Efficient orbit/spectrum utilization (under SG 4) |
| WP7A | Working Party 7A – Time signals and frequency standard emissions |
| WP7B | Working Party 7B – Space radio systems |
| WP7C | Working Party 7C – Earth-exploration satellite systems and meteorological elements |
| WP7D | Working Party 7D – Radio astronomy |
| WP7E | Working Party 7E – Inter-service sharing and compatibility (disbanded) |
| WPA | Water Pump Assembly |
| WPC | Weekly Planning Conference |
| WPD | Work Package Description |
| WPET | Work Package Evaluation Team |
| WPR | Weekly Plan Review |
| WPS | welding procedure specification |
| WPVR | welding procedure verification report |
| WR | Western Range |
| WR | Wrist Roll |
| WR | Western Range (was WTR) |
| WRC | World Radiation Centre in Davos |
| WRC | World Radiocommunications Conference |
| WRF | Working Capital Fund |
| WRM | water recovery & management |
| WRPVA | Water Recovery Port Vent Assembly |
| WRSVA | Water Recovery Starboard Vent Assembly |
| WS | Worksite |
| WS | Work Station (MT) |
| WS/A | water sampler/archiver |
| WSC | White Sands Complex |
| WSF | Wake Shield Facility |
| WSGS | White Sands Ground Station |
| WSGT | White Sands Ground Terminal |
| WSK | water sampling kit |
| WSMR | White Sands Missile Range |
| WSO | Wallops Scheduling Office |
| WSS | workstation stanchions |
| WSSH NS | White Sands Space Harbor (Northrup Strip) |
| WSTF | White Sands Test/Training Facility |
| WSTF | White Sands Test Facility, (NASA, managed by JSC) |
| WSUS | Windows Server Update Services |
| WTA | Warning Time Analysis |
| WTR | Western Test Range |
| WTVC | Wrist TV Camera (JEMRMS) |
| WUPPE | Wisconsin Ultraviolet PhotoPolarimter Experiment (Astro package) |
| WV | work volume |
| WVE | Wrist Vision Equipment (JEMRMS) |
| WVR | water vapour regained |
| WVTP | welding verification test plan |
| WVTR | welding verification test report |
| WWS | World-Wide Standards |
| WWV | Wate Water Vent |
| WWW | World Wide Web |
| WY | Wrist Yaw |
| WYE | Work Year Equivalent |
| Wresat | Weapons Research Establishment Satellite |
| X | MicroCurie |
| X | delta V |
| X | Experimental |
| XCF | X-ray crystallography facility |
| XCMU | External Command & Measurement unit |
| XCVR | Transceiver |
| XDA | eXploration Dexterous Arm |
| XDPI | X-ray diffraction prime item |
| XFER,XFR; Xfer | transfer |
| XI | X-Factor Investigator |
| XLA | eXploration Large Arm |
| XMIT; Xmit | transmit |
| XML | Extensible Markup Language |
| XMM | X-ray Multi-mirror Mission (Newton Observatory) |
| XNAV | X-ray pulsar Navigation |
| XOR | exclusive OR |
| XPI | X-ray Polarimeter Instrument |
| XPLC | External Payload Computer |
| XPNDR | standard TDRSS transponder |
| XPOP | X-axis perpendicular to orbit plane |
| XQC | X-Ray Quantum Calorimeter |
| XR | eXtended Reality |
| XSAT | Exceptional Satellite |
| XSN | External Service Network |
| XSS | Experimental Small Satellite |
| XTCE | XML Telemetric & Command Exchange |
| XTE | X-Ray Timing Explorer |
| XUV | eXtreme UltraViolet |
| Xlate | translate |
| Y | yaw |
| YES | Young Engineer's Satellite |
| YSO | Young Stellar Object |
| YTD | Year-to-Date |
| Z | Zulu (see UT) |
| Z; Zen | zenith |
| ZACube | ZA (South Africa) Cubesat |
| ZBR | Zero Base Review |
| ZCAM | Zoom Camera |
| ZEM | Z1 experiment module |
| ZMCU | Zoom Modular Camera Unit |
| ZOE | zone of exclusion |
| ZPM | Zero-Propellant Maneuver (ISS) |
| ZPM | maneuver,Zero-Propellant Maneuver (ISS) |
| ZSR | zero-g stowage rack |
| ZX | Zhonxing |
| Zero-g | weightlessness,zero gravity |
| a/c | crack aspect ratio (see 3.2.8) |
| atm; Atmos | atmosphere |
| avg | average |
| bps | bits per second |
| c.g. | center of gravity |
| cFR | core Flight Executive |
| cFS | Core Flight Software |
| cap mech | capture mechanism (JEMAL) |
| cb | circuit breaker |
| cf. | confer (= compare) |
| coupled | with Observations from a Lidar |
| dB | decibel |
| dBW | dB with respect to power |
| dBc | dB with respect to the unmodulated carrier |
| dBi | dB with respect to isotropic emission |
| dc | direct current |
| deg/sec | degrees per second |
| dev | develop or development |
| e-st@r | Educational SaTellite @ politecnico di Torino |
| e.g. | exempli gratia (= for example) |
| e.g. | exempli gratia (Latin,for example) |
| eDIT | European Data Integration Team |
| eDPC | Evening Daily Planning Conference |
| eFDP | Enhanced Functional Distributed Processor |
| eMMT | ESA Mission Management Team |
| eTS | (Federal) e-Travel Services, to migrate to a new service provider (eTS2) |
| emf | electro-motive force |
| epfd | equivalent power flux density |
| est | estimated |
| etc. | et cetera |
| f | frequency |
| fN | Nyquist frequency |
| flex | flexible |
| fps | feet per second |
| ft | ranging tone frequency |
| g | gravity or gravitational unit |
| g-LIMIT | GLovebox Integrated Microgravity Isolation Technology |
| govt | government |
| hFE | current gain of a bipolar transistor in common-emitter configuration |
| i.a.w. | in accordance with |
| i.d. | inside diameter |
| i.e. | id est (= that is) |
| i.e. | id est (Latin,that is (to say)) |
| iAPS | Improved Automated Payload Switch |
| iHAB | International Habitat Module |
| iINIT1 | inverse initialisation control word 1 |
| iINIT2 | inverse initialisation control word 2 |
| iLANES | inverse lane field |
| iLLCW | inverse Lane layer control word |
| iROC | Integrated Radio Optical Communications |
| iSat | Iodine Satellite |
| inc | increment |
| kHz | kilohertz |
| kW | kilowatt |
| kWh | kilowatt-hour |
| kbps | kilobits per second |
| km | kilometer |
| ksps | kilo symbol per second |
| lx | lux |
| m/z | ratio mass to charge |
| mDPC | Morning Daily Planning Conference |
| mRESINS | mini Redundant Strapdown Inertial Navigation System |
| maint | maintenance |
| max | maximum |
| mcf | fitting,microconical f. |
| memo | Memorandum |
| mg | milligram (hydrogen peroxide) |
| min | minimum |
| mmHg | millimeters of mercury |
| multi-g | more than 1-g acceleration situation |
| n.a | not applicable |
| n.a. | not applicable |
| nT | nano-Tesla |
| na | not applicable |
| o.d. | outside diameter |
| pH | hydrogen-ion concentration |
| ppCO2 | partial pressure of carbon dioxide |
| ppH2O | partial pressure or water |
| ppO2 | partial pressure of oxygen |
| ppmv | parts per million, volumetric |
| prelim | preliminary |
| prox | proximity |
| psia | pounds per square inch (absolute) |
| psig | pounds per square inch (indicated); pounds per square inch (gauge) |
| r.m.s. | root-mean-square |
| r.m.s. | root mean square |
| r.m.s. | root‐mean‐square |
| r.m.s. | rootmeansquare |
| rDNA | Ribosomal DNA |
| ref | reference |
| ref. | Reference |
| scc | Standard Cubic Centimeter |
| slammd | Space linear acceleration mass measurement device |
| spec | specification |
| sq | square (in unit Ω/sq) |
| station transfer hatch | ???-??-? (transfer module to active docking node) or ???-??-? (transfer module to passive docking node) (Kvant) |
| sth | station transfer hatch |
| temperature local commutator | TTI recommends deletion. |
| verif | verification |
| w.r.t. | with respect to |
| wk | week |
| wrt | with respect to |
| xEMU | Exploration Extravehicular Mobility Unit |
| °C | degree Celsius |
Contact & Contributions
spade-admin(at)esa.int