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
E1, E2, ETC - European Digitized Telephone Hierarchy
EAGE - Electrical Aerospace Ground Equipment
EBCDIC - Extended Binary Coded Decimal Interchange Code
EB/NO - Energy-per-bit to Noise-Density Ratio
EBR - Electronic Beam Record
EBU - European Broadcasting Union
ECC - Eccentricity
ECE - Economic Commission Manufactures Association
ECH - Earth Converge Horn
ECMA - European Computer Manufactures Association
ECOM - Electronic Computer-Originated Mail
ECS - European Communications Satellite System (Eutelsat)
ECWA - Economic Commission for Western Asia
EDA - Electronic Despun Antenna
EDP - Electronic Data Processing
EDPS - Experiment Data and Power System
EDTV - Enhanced Definition Television
EEA - Electrostatic Energy
EFI - Error-Free Intervals
EFT - Electronic Fund Transfer
EFTA - European Free Trade Association
EHF - Extremely High Frequency (Miriametric waves)
EHT - Electrothermal Hydrazine Thrusters
EIRP - Effective Isotropically Radiated Power
EISCAT - European Institute Scatter Facility
EL - Elevation
ELF - Extremely Low Frequency
ELT - Emergency Locating Transmitters
ELU - Existing Carrier Line-Up
ELV - Expanded Launch Vehicles
EM - Engineering Model
EMF - Electromotive Force
EMI - Electro Magnetic Interference
EMS - Electronic Message Service
EOC - End of Coverage
EOL - End of Life
EOS - Earth Observation Satellite
EOW - Engineering Order Wire
EPC - Electronic Power Conditioner
EPDS - Experiment Power and Data Systems
EPIRB - Emergency Position Indicating Radio Beacon
EPTA - Expanded Program of Technical Assistance (UN)
EQ - Energy per Unit Charge
ER AND S - Exploratory Research and Studies
ES - Echo Suppressor
ES – Earth Station
ESA - European Space Agency
ESC - European Space Conference
ESC - Engineering Service Circuit
ESOC - European Space Operations Center
ESRANGE - European Space Sounding Rocket Landing Range (ESA)
ESTEC - European Space Research and Technology Center
ESTL - European Space Tribology Centre (UK Atomic Energy Authority)
ETR - Eastern Test Range (NASA’s Cape Canaveral - USA)
ETS - Engineering Test Satellite
ETSI - European Telecommunications Standards Institute
ETT - Electrothermal Thruster
EURONET - European Public Network (Data)
EUROSPACE - European industry space study group
EUTESLAT - European Telecommunications Satellite Organization
EUV - Extreme Ultraviolet
EV - Electron Volt
EVA - Extravehicular Activity
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
FAA - Federal Aviation Administration (USA)
FC - Sampling Frequency
FCC- Federal Communications Commission (USA)
FD - Focal Length to Diameter Ratio
FDFM - Frequency Division/Frequency Modulation
FDM - Frequency Division Multiplex
FDM/CFM - Frequency Division Multiplex/Companded FM
FDM/FM - Frequency Division Multipled/Frequency Modulated
FDMA - Frequency Division Multiple Access
FDR - Final Design Review
FDSS - Fine Digital Sun Sensor
FDSSA - Fine Digital Sun Sensor Assembly
FDX - Full Duplex
FEC - Forward Error Correction
FET - Field Effect Transistor
FFP - Fixed Fee Procurement
FFT - Fast Fourier Transform
FLTR - Filter
FLTSATCOM - US Navy Communications System (USA)
FLU - Full Line-Up
FM - Frequency Modulation
FMEA - Failure Modes and Effects Analysis
FMFB - Frequency Modulation Feedback
FMWA - Fixed Momentum Wheel Assembly
FOS - Follow-On Satellites
FP - Full Period
FPA - Final Power Amplifiers
FSK - Frequency-Shift Keyed
FSS - Fixed Satellite Service
FT - Full Time
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
G - Gain/Gravity
G - Giga (1,000,000,000)
GAAS - Gallium Arsenide
GAASFET - Gallium Arsenide Field Effect Transistor
GAC - Global Area Coverage
GAGR - Group Automatic Gain Regulator
GARP - Global Atmospheric Research Program
GARS - Geological Applications for Remote Sensing
GATT - General Agreement on Tariffs and Trade
GC - Gigacycles
GCE - Ground Control Equipment
GCS - Ground Control System
GDF - Group Distribution Frame
GDPS - Global Data Processing System
GEMS - Global Environment Monitoring System (UN)
GEO - Geostationary Equatorial Orbit
GEO-IRS - Geostationary-Infrared Sensor
GHA - Greenwich Hour Angle
GHZ - Gigahertz
GIP - Group Interface Processor
GMDSS - Global Maritime Distress and Safety System
GME - Group Modulating Equipment
GMT - Greenwich Mean Time
GND - Ground
GPS - Global Positioning System
GRD - Ground Resolved Distance
GRID - Global Resource Information Database
GRP - Group Reference Point
GSFC - Goddard Space Fight Center (USA)
GSO - Geosynchronous Earth Orbit
G/T - Gain-to-Noise Temperature Ratio
GTE - Group Translating Equipment
GTS - Global Telecommunications System
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
HDLC - High-Level Data Link Control
HDX - Half Duplex
HCE - Heater Control Electronics
HDTV - High Definition Television
HE - Heat Exchanger
HEAO - High-Energy Astronomy Observatory
HEOS - Highly Eccentric Orbit Satellite
HF - High Frequency (3,000-30,000 kHz)
HLLV - Heavy Lift Launch Vehicle
HM - Hybrid Modulation
HP - Horsepower
HPA - High Power Amplifier
HPF - High Pass Filter
HPM - Hybrid Phase Modulation
HVCS - Half Voice Circuites
HU - High Usage Circuit
HYPACE - Hybrid Programmable Attitude Control Electronics
HZ - Hertz (Cycles per Second)
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
IA2, IA5, ETC. - International Alphabet Number 2, Number 5 etc.
IAF - International Astronautical Federation
IAGA - International Association of Geomagnetism & Astronomy
IAM - International Address Message
IAMAP - International Association of Meteorology and Atmospheric Physics
IBC - Independent Broadcasting Commission
IBI - Intergovernmental Bureau for Infomatics
IBTO - International Broadcasting & Television Organization
IC - Integrated Circuit
ICAO - International Civil Aviation Organization
ICC - International Chamber of Commerce
ICN - Idle Channel Noise
ICRP - International Commission Radiological Protection
ICSC - Interim Communications Satellite Committee
ICSU - International Council of Scientific Unions
IDA - International Development Association
IDCC - International Data Coordinating Centers
IDF - Intermediate Distribution Frame
IDR - Intermediate Data Rate
IE - Index Error
IEE - Institute of Electrical Engineers (UK)
IEEE - Institute of Electrical and Electronics Engineers (USA)
IERE - Institution of Electronics and Radio Engineers
IESS - Intelsat Earth Station Standard
IF - Intermediate Frequency
IFL - Inter-Facility Link
IFRB - International Frequency Registration Board (ITU)
IFTC – International Film and Television Council
IISL - International Institute of Space Law
ILD - Injection Laser Diode
IM - Intermodulation
IMPD - Impedance
INC - Inclination
INMARSAT - International Maritime Satellite Organization
INTELNET - Data Distribution and Gathering Network
INTELSAT - International Telecommunications Satellite Organization
INTERCOSMOS - Council on International Cooperation in the Study and Utilization of Outer Space
INTERSPUTNIK - International Space Telecommunications Organization (Russia)
IOB - Inter-Organization Board for Information Systems and Related Activities
IOCTF- IOC TDMA - Facility
IOR - Indian Ocean Region
IOT - In-Orbit Test Antenna
IPA - Intermediate Power Amplifier
IPDC - International Program for Development of Communications
IPS - Instrument Pointing System
IPTS - International Press Telecommunications Council
IPU - Information Processing Ability
IR - Power Loss from Resistive Dissipation
IR - Infrared
IRD - Integrated Receiver-Decoder
IRE - Institute of Radio Engineers
IRU - Indefeasible Right of Use
ISB - Independent Sideband
ISC - Interdisciplinary Scientific Commission (COSPAR)
ISCC - International Service Coordinating Center
ISD - International Subscriber Dialing
ISDN - Integrated Services Digital Networks
ISL - Intersatellite Link
ISMC - International Switching Maintenance Center
ISP - Specific Impulse
ISPRS - International Society for Photogrammetry and Remote Sensing
ISS - Interrupt Safety Systems
ISTC - Integrated System Test
ITC - International Television Center
ITC - Inter-American Telecommunications Network
ITC - International Teletraffic Congress
ITC - International Institute for Aerial Survey and Earth Sciences (Netherlands)
ITFC - Instructional Television Service (USA)
ITMC - International Transmission Maintenance Centers
ITS - Institute of Telecommunications Sciences (USA)
ITU - International Telecommunications Union
IUCAF - Inter-Union Commission of Allocation of Frequencies for Radio
IUGG - International Union of Geodesy and Geophysics
IUS - Interim Upper Stage
IXC -Interchange Channel
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
JFET - Junction Field Effect Transistor
JSC - Johnson Space Center (USA)
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
K - Kelvin, a scale of (noise) temperature based on Celsius scale
K - Boltzmann’s Constant
KAG - Kagoshima Space Center (Japan)
KB/S or K BIT/S - Kilobits per Second
KEV - Kiloelectron Volt
KHZ - Kilohertz
KP - Start of Pulsing
KSC - Kennedy Space Center (USA)
KW - Kilowatt
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
LAC - Local Area Coverage
LAMAR - Large area Modular Array of Reflectors
LAMMR - Large Antenna Multifrequency MW Radiometer
LAN - Local Area Network
LATA - Local Access and Transport Area
LAT - Latitude
LC - Conductance and Capacitance
LCC- Launch Control Center
LCT - Laboratoire Central des Telecommunications (Central Telecommunications Laboratories) France
LDM - Linear-Delta Modulation
LDTS - Low Density Telephony Service
LEASAT - US Military Satellite Network (USA)
LEC - Lockheed Electronic Company (USA)
LED - Light Emitting Diode
LEO - Low Earth Orbit
LF - Line-Feed
LFA - Local Hour Angle
LHCP - Left-Hand Circular Polarization
LMA - Limited Motion Antenna
LMSS - Land Mobile Satellite Service
LMT - Local Mean Time
LNA - Low Noise Amplifier
LNB - Low-Noise Block Converter
LNC - Low-Noise Converter
LNR - Low-Noise Receiver
LO - Local Oscillator
LON - Longitude
LOR - Loran
LOS - Loss of Signal
LOX - Liquid Oxygen
LPC - Linear Predictive Coding
LPF - Low Pass Filter
LPS - Launch Process System
LRE - Low Rate Encoding
LS - Link Switch
LSE - Line Signaling Equipment
LSI - Large Scale Integration
LSM - Line Switch Marker
LSO - Line Signaling Oscillator
LTOM - Less than one minute
LTOS - Less than one second
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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