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ADC Analog to Digital Converter
AIRSAR Airborne Synthetic Aperture Radar
ASAR Advanced Synthetic Aperture Radar
ASF Alaska Synthetic Aperture Radar Facility
ASIC Application Specific Integrated Circuit
ASTER Advanced Spaceborne Thermal Emission and Reflection
Radiometer
ATISAR Along-Track Interferometric Synthetic Aperture Radar
AVHRR Advanced Very High Resolution Radiometer
AVIRIS Airborne Visible/Infrared Imaging Spectrometer
C C-band, as in CHH or CVV
CES Committee on Earth Studies
CMOS Complementary Metal-Oxide Semiconductor
COTS CPU Commercial Off-The-Shelf CPU
CPU Central Processing Unit
CV Coefficient of Variation
DAAC Distributed Active Archive Center
DC-8 Douglas Commercial aircraft cargo - model 8
DMSP Defense Meteorological Satellite Program
EEZ Exclusive Economic Zone
ENSO El Niño, Southern Oscillation
ENVISAT Enviromental Satellite
EOS Earth Observing System
EPA Environmental Protection Agency
ERS-1, ERS-2 European Remote Sensing Satellite
ESA European Space Agency
FET Field Effect Transistor
FPGA Field Programmable Gate Array
GCMs General Circulation Models
GCRP Global Change Research Program
GFLOP Giga (=Billion) Floating Point Operations per second
GPS Geophysical Processor System, or Global Positioning System
GOM Geometrical Optics Model
HEMT High-Electron Mobility Transistor
hf high frequency
HH Horizontal polarized transmission, Horizontally polarized
reception
HIROS High-Resolution Infrared Sounder
HV Horizontal polarized transmission, Vertically polarized
reception
I/O Input and Output
IEM Integral Equation Method
IF Intermediate Frequency
INPA Instituto de Pesquisas A
INPE Instituto de Pesquisas Espacias
IR Infrared
ITU International Telecommunications Union
JERS-1 Japanese Earth Remote-Sensing Satellite
JPL Jet Propulsion Laboratory
L L-band, as in LHH or LVV
MESFET Metal-Semiconductor Field-Effect Transistor
MLE Maximum Likelihood Estimator
MMIC Millimeter/Microwave Integrated Circuit
MPM Manipulator Positioning Mechanism or Manufacture Procedure
Manual
MTPE Mission to Planet Earth
NASA National Aeronautics and Space Administration
NDVI Normalized Difference Vegetation Index
NESDIS National Environment Satellite Data and Information Services
NOAA National Oceanic and Atmospheric Administration
OMTPE Office of Mission to Planet Earth
ONR Office of Naval Research
OSB Ocean Studies Board
POM Physical Optics Model
PRF Pulse Repetition Frequency
RADAM Brazilian Airborne Mapping of the Amazon
RADAR RAdio Detection And Ranging
RADARSAT Radar Satellite
RAR Real-Aperture Radar
RF Radio Frequency
RGB Red, Green, and Blue
RGPS Radarsat Geophysical Processor System
SAR Synthetic Aperture Radar
SCANSAR Scanning Synthetic Aperture Radar
SIR-A, SIR-B Shuttle Imaging Radar-A , -B
SIR-C/X-SAR Spaceborne Imaging Radar-C, X-Band Synthetic Aperture
Radar
SPM Small PerturbationModel
SPOT Systeme Probatoire d'Observation de la Terre
SRAM Static Random Access Memory
SRL-1, SRL-2 Space Radar Laboratory
SSB Space Studies Board
STS 59 and STS 68 Space Transport System
TDR Time Domain Reflectivity
T/R modules Transmit/Receive
TM Thematic Mapper
TOGA/COARE Tropical Ocean Global Atmosphere/Coupled Ocean-
Atmosphere
Response Experiment
TOPEX/POSEIDON Ocean Topography Experiment
TOPSAR TOPographic Synthetic Aperture Radar
TSS Tug Structural Support
TWT Traveling Wave Tube
USCB University of California at Santa Barbara
U.S.S.R. Union of Soviet Socialist Republics
U.S. United States
USGS United States Geological Survey
VH Vertically polarized transmission, Horizontally polarized
reception
VLBI Very Long Baseline Interferometery
VV Vertically polarized transmission, Vertically polarized
reception
W Watts
WAM Wave Analysis Model
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