A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
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
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
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
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
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
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
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
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
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