Acronyms :: E-L

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E

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

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F

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

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G

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

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H

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)

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I

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

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J

JFET – Junction Field Effect Transistor
JSC – Johnson Space Center (USA)

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K

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

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L

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

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