Acronyms :: A-D


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A

ABM - Apogee Booster Motor
AC – Alternating Current
ACAST- Advisory Committee on the Application of Science and Technology to Development (United States)
ACC – Antenna Control Console
ACD – Automatic Call Distribution
ACE – Audio Connecting Equipment
ACI – Adjacent Channel Interference
ACS – Attitude Channel Interference
ACTS – Advanced Communication Technology Satellite (USA)
ACU – Antenna Control Unit
A/D – Analog-to-digital
ADACS – Attitude Determination and Control System
ADCE - Attitude Determination and Control Electronics
ADCS – Attitude Determination and Control Subsystem
ADM – Adaptive Delta Modulation
ADPM – Adaptive Differential Pulse Code Modulation
AF – Audio Frequency
AFC – Automatic Frequency Control
AFETR – Air Force Eastern Test Ranges
AGC – Automatic Gain Control
A-H – Amp-House; Ampere Hour
AIAA – American Institute of Aeronautics and Astronautics (USA)
AKM – Apogee Kick Motor
ALT – Altitude
AM – Amplitude Modulation
AM – Apogee Motor
A-MAC – Type A Multiplexed Analog Components
AMF – Apogee Motor Firing
AMS – Attitude Measurements Sensor
AMSS – Aeronautical Mobile Satellite Service
ANC – Automatic Nutation Control
ANSI – American National Standards Institute
ANTEL – Administration Nacional de Telecomunicaciones
ACOS – Attitude and Orbit Control System
AOR – Atlantic Ocean Region
AOS – Attitude and Orbit Control Subsystem
AOTS – Advanced Orbital Test Satellite (ESA)
APC – Autonomous Payload Controller
APC – Adaptive Predictive Coding
APCS – Autonomous Payload Control System
APD – Avalanche Photodiode Detector
APE – Antenna Positioning Electronics
APEX – Satellite Network (France)
APKS – Amplitude-Phrase- Keyed System
APM – Antenna Positioning Mechanism
APS – Auxiliary Power Supply
ARA – Angular Rate Assembly
ARC – Administrative Radio Conference (ITU)
ARENTO – Telecommunications Organization (Arab Republic of Egypt)
ARINC – Aeronautical Radio Inc.- Advance Research Projects Agency (USA)
ARPA – Advanced Research Projects Agency (USA)
ARQ - Automatic Repeat Request
ARTI – Arab Regional Telecommunications Institute
ASA – American Standards Association
ASBU – Arab States Broadcasting Union
ASCIL – American Standard Code for Information Interchange
ASCO – Arab Satellite Communications Organization
ASEAN – Association of South East Asian Nations
ASI – Italian Space Agency
ASIN – Action of National Information Systems
ASR – Automatic Send and Receive
ASU – Acquisition and Synchronization Unit
AT – Acceptance Test
ATB – All Trucks Busy
ATC – Adaptive Transform Coding
ATDA – Augmented Target Docking Adaptor
ATME – Automatic Transmission Measuring Equipment
ATU – Arab Telecommunications Union
AU – Astronomical Unit
AVD – Alternate Voice/Data
AZ – Azimuth

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B

B – Magnetic Field Strength
B – Byte (8 bits)
BAI – Balkonur Launch Complex (Russia)
BAPTA – Bearing and Power Transfer Assembly
BB – Baseband
BBC – British Broadcasting Corporation
BBTM – Beam-to-beam Traffic Matrix
BBU – Baseband Unit
BBC – Block check character
BCD – Binary Coded Decimal
BCW – Burst Codewords
BDE – Baseband Distribution Equipment
BDF – Baseband Distribution Frame
BDLC – Bisync Data Link Control
BDU – Baseband Distribution Unit
BEF – Band Elimination Filter
BER CONT – Bit Error Rate Continuous
BEX – Broadband Exchange
BEZEK – The Israel Telecom Corporation Ltd.
BFO – Beat Frequency Oscillator
BFSK – Binary Frequency Shift Keying
BIH – Bureau Internatioanle de l’heure (International Time Bureau)
BINR – Basic Intrinsic Noise Ratio
BIPM – Bureau International de Poldes et Meaures (International Bureau of Weights and Measures)
BLD – Binary Load Dump (Spade)
BLK – Block
BO – Backoff
B-MAC – Type B Multiplexed Analog Components
BOD – Beneficial Occupancy Date
BOL – Beginning of Life
BONAC – Broadcasting Organization of the Non-Aligned Countries
BP – Bandpass
BPF – Bandpass Filter
BPI – Bits Per Inch
BPS OR BIT/S – Bit Per Second
BPSK – Bi-Phrase Shift Keyed
BSBD – Baseband
BSC – Binary Synchronous Protocol
BSI – British Standards Institution (UK)
BSM – Baseband Switch Matrix
BSS – Broadcasting Satellite Service
BST – Block the Spade Terminal Command
BSU – Baseband Switching Unit
BSFX – Burst Sync Failure (SPADE)
BT – British Telecom
BTE – Bench Test Equipment
BTI – British Telecommunications International (UK)
BTR – Bit Time Recovery
BTU – British thermal Unit
BU – Baseband Unit
BUC – Block Up Converter
BUV – Backscatter Ultraviolet
BVU – Brightness Value Unit
BW – Bandwidth
BWR – Bandwidth Radio

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C

C – Celsius; Centigrade, Coulomb
C/I – Carrier-to-Interference Ratio
C/N – Carrier -to-Noise Ratio
C/T – Carrier-to-Temperature Ratio
CANTO – Caribbean Association of National Telecommunications Operators
CAR – Channel Assignments Record
CASSA – Coarse Analog Sum Sensor Assembly
CATV – Community Antenna Television
CC – Common Carrier
CCI – Comite Consultatif International  (International Consultative Committee)
CCIR – Comite Consultatif International de Radio (International Radio Consultative Committee) (ITU)
CCIS – US/ATT, Common Channel Interoffice Signaling (USA)
CCITT – Comite Consulatif International des Telephones et Telegraphes (International Telephone and Telegraph Consultive Committee (ITU)
CCFK – Continuity Check Failute (SPADE)
CCT – Continuity Check Transceiver
CCTS – Coordinating Committee on Satellite Communications
CD – Crystal Detector
CDA – Command and Data Acquisition (Station)
CDE – Control and Display Equipment
CDF – Carrier Distribution Frame
CDHP – Command and Data Handling Package
C AND DH – Control and Data Handling
CDMA – Code Division Multiple Access
CEE – Communaute Europeenne Economique (European Economic Community)
CENTO – Central Treaty Organization
CEPT – European Conference on Postal and Telecommunications Administrations
CES – Coast Earth Station (Inamoratas)
CETS – European Conference on Satellite Communications
CETTEM – Center of Telecommunications for the Third World
CFM – Companded FM
CG/MOI – Center of Gravity/Moment of Inertia
CGMS – Coordination of Geostationary Meteorological Satellites
CGPM – General Conference of Weights and Measures
CH – Channel
CHU – Channel Unit (Spade)
C/I – Carrier/Interference Ratio
CIC – Common Interface Circuit
CIC – Cover Integrated Cell
CICT – Centre International de Control Technique (International Technical Control Center) (ITCC)
CID – Cathode Imaging Detector
CISPR – International Special Committee on Radio Interference
CITE – Cargo Integrated Test Equipment
CKR – Receive Bit Clock
CKT – Circuit
CKT – Transmit Bit Clock
CLK – Clock
CLR – Clear
C-MAC – Type C Multiplexed Analog Components
CMBD – Joint Committee on Circuit Noise and Availability
CMD – Command
CME – Circuit Multiplication Equipment
CMEA – Council on Mutual Economic Assistance
CMI – Joint International Committee for Tests Relating to the Protection of Telecommunication Lines and Underground Ducts
CMOS – Complementary Medal Oxide Semiconductor
CMR – Cellular Mobile Radio
C/N – Carrier/Noise Ratio
CNES – Centre National d’Etudes des Spatiales (France)
CNES – Center National d-Etudes Spatials (French NASA)
CNET – Centre National d’Etudes des Telecommunications (France)
C/NO – Carrier-to-Noise Density
CNR – Consiglio Nazionale Delle Ricerche (Italy)
CNR – Carrier/Thermal Noise Ratio
CNSS – Center for National Space Study
CO – Circuit Order
CODEC – Coder-Decoder
CONG – Congestion Error Control
CO-ORD – Coordination Channel
COP – Communications Operations Plan
CO-POL – Co-Polarization
COAX – Coaxial Cable
CODEC – Coder-Decoder
COM – Computer Output Microfilm Campanding Compression and Expansion
CONUS – Continental United States (Coverage)
COPS – Command Operations
CPE – Customer Premises Equipment
CPES – Customer Premises Earth Station
CPFSK – Continuous Phase Frequency Shift Keying
CPU – Central Processing Unit
CPS – Cycles per Second
COSMOS – European Multinational Industrial Consortium
COSPAR – Comite Mondial de la Rechereche Spatiale (World Committee on Space Research) (ICSU-UN)
COSTED – Committee on Science and Technology in Developing Countries (ICSU-UN)
CP – Circular Polarization
CPC – Committee for Programs and Coordination of ECOSOC
CPSK – Coherent Phase Shift Keying
CPU – Central Processing Unit
CR – Carrier Recovery
CRAN – Command Receive Antenna
CRBW – Carson Rule Bandwidth
CRC – Cyclic Redundancy Code
CRPL – Central Radio Propagation Laboratory
CRT – Cathode Ray Tube
CR AND T – Command, Ranging, and Telemetry
CRTS – Cellular Radio Telephone Service
CRTO – Centre Rigionali (Italy)
CRYO – Cryogenic
CSC – Common Signaling Channel Demodulator
CSCE – Communications Subsystem Checkout Equipment
CSCM – Common Signaling Channel Modem
CSG – Guiana Space Center (Center Spatial de Guyuanne)
CSM – Communications Systems Monitoring
CSM – Commission for Synoptic Meteorology
CSME – Communications Systems Monitoring Equipment
CSSB – Companded Sigle-Sideband
CSOC – Consolidated Space Operations Center
CSU – Constant Speed Unit
CSU – Channel Service Unit
C/T – Carrier/Noise Temperature Ratio
CT – Transit Center
CTB - Commonwealth Overseas Telecommunications Council
CTE – Channel Translating Equipment
CTNE – Compania Telephonica National de Espana
CW – Carrier Wave
CW – Continuous Wave
CXR – Carrier

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D

D/C – Downconverter
DAA – Data Access Arrangement
DA – Demand Assignment
DAB – Digital Audio Broadcasting
DAIT – Demand Assigned International Terminal
DAMA – Demand Assignment Multiple Access
DARA – German Space Agency
DASS – Demand Assignments Signaling and Switching Unit
DB – Decibel
DB/K – Decibels Per Degree Kelvin
DBH – Diameter at Breast Height
DBM – Decibels relative to one Milliwatt
DBMO – dBm referred to or measured at a point of zero
DBS – Direct Broadcasting Satellites
DBTR – Digital Bit Timing Recovery
DBW – Decibels relative to one watt
DC – Direct Current
DC – Downconverter
DCA – Defense Communications Agency
DCE – Data Communications Equipment
DCE – Despun Control Electronics
DCP – Data Collection Platforms
DCPSK – Differentially Coherent Phase Shift Keying
DCRT – Data Collection Receive Terminal
DCS – Direct Couple System; Data Collection System
DCU – Display and Control Unit
DD/C – Dual Downconverter
DDI – Direct Digital Interface
DDS – Digital Data System
DDS – Dataphone Digital Service
DEC – Declination
DEMOD – Demodulator
DEMUX – Demultiplexer
DES – Digital Encryption Standard
DET – Detector
DEV – Deviation
DGT – Directorate General of Telecommunications (France)
DIOS – Digital In-Band Open-Loop Synchronization
DITEC – Digital Television Communication System
DL or D/L – Downlink
DLF – Direct Through-Connection Filter
DLR – German Aerospace Research Establishment
DM – Delta Modulation
DMA – Direct Memory Access
D-MAC – Type D multiplexed analog components
D2-MAC – Type D2 multiplexed analog components
DM/PSK – Delta Modulation/Phase Shift Keyed
DNI – Digital Non-Interpolated
DOD – Department of Defense (USA)
DOMSAT – Domestic Satellite System
DPA – Destructive Physical Analysis
DCPM – Differential Pulse Code Modulation
DPSK – Differential Phase Shifting Keyed
DPU – Data Processing Unit
DQPSK – Differential Quadrature PSK
DR – Dynamite Range
DRT – Data Recording Terminal
DS1, DS2, ETC. – Digital Service Hierarchy
DSB – Double Sideband
DSB-SC-AM – Double Sideband-Suppressed Carrier-Amplitude Modulation
DSB-SC-AM W/QM – Double Sideband-Suppressed Carrier-Amplitude with Quadrature Multiplexing
DSB-SC-ASK – Double Sideband-Suppressed Carrier-Shift Keyed
DBS-SC-AMW/QM – Double Sideband-Suppressed Carrier-Amplitude Shift Keyed
DSI – Digital Speech Interpolation
DSIF – Deep Space Instrumentation Facility
DSIR – Department of Scientific and Industrial Research (UK)
DSN – Deep Space Network
DSNG – Digital Satellite Newsgathering
DST – Direct Sounding Transmission
DTE – Data Terminating Equipment
DTH – Direct-to-home Broadcast
DTI – Data Transfer Interface
DTMF – Dual Tone Multi-Frequency
DUS – Data Utilization Stations
DVT – Design Verification Test
DX – Duplex

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