a, A |
Acceleration |
A |
Ampere |
Å |
Angstrom |
AA |
Accounting Authority |
AACS |
Attitude and Articulation Control Subsystem |
AAIC |
Accounting Authority Identification Code |
AAL |
ATM Adaptation |
AA/TDMA |
Adaptive Assignment TDMA |
ABE |
Alternative Billing Entity |
ABM |
Apogee Boost Motor |
ABM |
Asynchronous Balanced Mode |
ABR |
Audio Broadcast Receiver |
ABR |
Available Bit Rate |
ABU |
Asian Broadcasting Union |
AC |
Alternating Current |
AC |
Assignment Channel |
ACAST |
Advisory Committee on the Application of Science and Technology to Development |
ACC |
Antenna Control Console |
ACC |
Automatic Chroma Correction |
ACD |
Automatic Call Distribution |
ACE |
Audio Connecting Equipment |
AceS |
Asia Cellular System |
ACI |
Adjacent Channel Interference |
ACK |
Acknowledgement |
ACM |
Adaptive Coding and Modulation |
ACME |
Analogue Circuit Multiplication Equipment |
ACP |
Adjacent Channel Power |
ACPR |
Adjacent Channel Power Ratio |
ACPR |
Adjacent Channel Protection Ratio |
ACPW |
Asymmetrical Coplanar Waveguide |
ACS |
Access Control System |
ACS |
Attitude Control System |
ACTP |
Abridged Condensed Time Plan |
ACTS |
Advanced Communication Technology Satellite |
ACU |
Antenna Control Unit |
A/D |
Analogue to Digital |
ADACS |
Attitude Determination and Control System |
ADC |
Analogue to Digital Conversion |
ADCE |
Attitude Determination and Control Electronics |
ADCS |
Attitude Determination and Control System |
ADD |
Architectureal Design Document |
ADDT |
Advanced Digital Television Technologies |
ADE |
Above Deck Equipment |
ADM |
Adaptive Delta Modulation |
ADN |
Advanced Digital Network |
ADP |
Acceptance Design Package |
ADPCM |
Adaptive Differential Pulse Code Modulation |
ADR |
Architectural Design Review |
ADR |
Astra Digital Radio |
ADS-B |
Automatic Dependent Surveillance Broadcast |
ADSL |
Asynchronous Digital Subscriber Line |
AES |
Aircraft Earth Station |
AF |
Audio Frequency |
AFC |
Automatic Frequency Control |
AFETR |
Air Force Eastern Test Ranges |
AFSS |
Automated Flight Safety System |
AGC |
Automatic Gain Control |
AGN |
Active Galactic Nucleus |
AgP |
Argument of Periapsis |
A-H |
Ampere Hour |
A-H |
Amp-House |
AIAA |
American Institute of Aeronautics and Astronautics |
AIS |
Alarm Indication Signal |
AIT |
Assembly, Integration and Test |
AIV |
Assembly, Integration and Verification |
AKM |
Apogee Kick Motor |
ALS |
Automatic Landing Sequence |
ALT |
Altitude |
ALT |
Altimetry data |
am |
Attometer |
AM |
Additive Manufacturing |
AM |
Amplitude Modulation |
AM |
Ante Meridian (morning) |
AM |
Apogee Motor |
A-MAC |
Type A Multiplexed Analogue Components |
AMF |
Apogee Motor Firing |
AMMOS |
Advanced Multimission Operations System |
AMPS |
Advanced Mobile Phone System |
AMS |
Attitude Measurements Sensor |
AMSS |
Aeronautical Mobile Satellite Service |
AN |
Ascending Node |
ANC |
Automatic Nutation Control |
ANSI |
American National Standards Institute |
AO |
Acousto-Optic |
AO |
Adaptive Optics |
AO |
Announcement of Opportunity |
AoA |
Angle of Attack |
AOC |
Advanced Operations Centre |
AOCS |
Attitude and Orbit Control System |
AoD |
Audio on Demand |
AoE |
Area of Effect |
AOR |
Atlantic Ocean Region |
AOS |
Acquisition Of Signal |
AOTF |
Acousto-Optic Tunable Filter |
AOTS |
Advanced Orbital Test Satellite |
ApA |
Apoapsis Altitude |
APC |
Adaptive Predictive Coding |
APC |
Autonomous Payload Controller |
APCS |
Autonomous Payload Control System |
APD |
Apoapsis Distance |
APD |
Avalanche Photodiode Detector |
APE |
Antenna Positioning Electronics |
APE |
Attitude Processor Electronics |
APID |
Application Process IDentifier |
APM |
Amplitude Phase Modulation |
APM |
Antenna Positioning Mechanism |
ApR |
Apoapsis Radius |
APS |
Auxiliary Power Supply |
APSK |
Amplitude Phase Shift Keying |
APU |
Auxiliary Power Unit |
AR |
Acceptance Review |
AR |
Area Ratio |
AR |
Axial Ratio |
ARA |
Angular Rate Assembly |
ARC |
Administrative Radio Conference |
ARF |
Alternate Recovery Facility |
ARINC |
Aeronautical Radio Inc |
ARP |
Address Resolution Protocol |
ARPA |
Advanced Research Projects Agency |
ARQ |
Automatic Repeat reQuest |
ARTI |
Arab Regional Telecommunications Institute |
ASA |
American Standards Association |
ASBU |
Arab States Broadcasting Union |
ASCENT |
Advanced Spacecraft Energetic Non-Toxic |
ASCII |
American Standard Code for Information Interchange |
ASCO |
Arab Satellite Communications Organisation |
ASDS |
Autonomous Spaceport Drone Ship |
ASEAN |
Association of South East Asian Nations |
ASI |
Asynchronous Serial Interface |
ASIC |
Application Specific Integrated Circuit |
ASK |
Amplitude Shift Keying |
ASM |
Advanced Satellite Mobile |
ASM |
Attached Synchronisation Marker |
ASMS-TF |
Advanced Satellite Mobile Systems – Task Force |
ASPR |
Automatic Satellite Position Report |
ASR |
Automatic Send and Receive |
ASS |
Amateur Satellite Service |
ASSR |
Acquisition and Steady State Reception Procedure |
ASU |
Acquisition and Synchronisation Unit |
AT |
Acceptance Test |
ATB |
All Trucks Busy |
ATB |
Avionics Test Bench |
ATC |
Adaptive Transform Coding |
ATC |
Ancillary Terrestrial Component |
ATDA |
Augmented Target Docking Adaptor |
ATDE |
Adaptive Time Domain Equaliser |
ATIS |
Automatic Transmitter Identification System |
ATM |
Asynchronous Transfer Mode |
ATM |
Automatic Teller Machine |
ATME |
Automatic Transmission Measuring Equipment |
ATOX |
Atomic Oxygen |
ATP |
Acceptance Test Procedure |
ATU |
Arab Telecommunications Union |
ATV |
Advanced Technology Vehicle |
AU |
Astronomical Unit |
AUC |
Authentication Centre |
A/V |
Audio Visual |
AVC |
Advanced Video Coding |
AVD |
Alternate Voice/Data |
AVI |
Avionics Operator |
AWG |
American Wire Gauge |
AWGN |
Additive White Gaussian Noise |
AZ |
Azimuth |