List of Acronyms and Abbreviations

AEW Airborne Early Warning
am Attometer (10-18 meter)
AMTI Airborne Moving-Target Indication
ARSR Air Route Surveillance Radar
ASDE Airport Surface Detection Equipment
ASR Airport Surveillance Radar
ATC Air Traffic Control
BBA-97 Balanced Budget Act of 1997
BSS Broadcast Satellite Service
CLOUDSAT Cloud Satellite
cm Centimeter (10-2 meter)
CW Continuous Wave
DEMS Digital Electronic Message Service
DOD Department of Defense
DOE Department of Energy
DOI Department of the Interior
DOJ Department of Justice
EESS Earth Exploration-Satellite Service
EHF Extra High Frequency
FAA Federal Aviation Administration
FAS Frequency Assignment Subcommittee
FCC Federal Communications Commission
fm Femtometer (10-15 meter)
FM Frequency Modulation
FM-CW Frequency-Modulated Continuous-wave
GHz Gigahertz (109 Hertz)
HF High Frequency
HF OTH High Frequency Over-the-Horizon
ICAO International Civil Aviation Organization
IFF Identification, Friend or Foe
IMO International Maritime Organization
IRAC Interdepartment Radio Advisory Committee
ISAR Inverse synthetic aperture radar
ITU International Telecommunication Union
kHz Kilohertz (103 Hertz)
MHz Megahertz (106 Hertz)
mm Millimeter (10-3 meter)
MTI Moving-Target Indication
NAS National Airspace System
NASA National Aeronautics and Space Administration
NATO North Atlantic Treaty Organization
NEXRAD Next Generation Weather Radar
nm Nanometer (10-9 meter)
NMD National Missile Defense
NOAA National Oceanic and Atmospheric Administration
NORAD North American Air Defense
NSF National Science Foundation
NTIA National Telecommunications and Information Administration
OBRA-93 Omnibus Budget Reconciliation Act of 1993
OMB Office of Management and Budget
PAR Precision Approach Radars
pm Picometer (10-12 meter)
PRR Pulse Repetition Rate
PW Pulse Width
RAF Royal Air Force
RDT&E Research, Development, Test, and Evaluation
RPV Remotely Piloted Vehicle
SAR Synthetic Aperture Radar
SBR Spaceborne Radar
SHF Super High Frequency
SLAR Side-looking Airborne Radar
SPASUR Space Surveillance
SPS Spectrum Planning Subcommittee
SR Space Research
SRTM Shuttle Radar Topography Mission
TDWR Terminal Doppler Weather Radar
THAAD Theater High Altitude Area Defense System
THZ Terahertz (1012 Hertz)
TOPEX Ocean Topography Experiment
TRMM Tropical Rain Measuring Mission
TWS Track-While-Scan
UHF Ultra High Frequency
USDA U.S. Department of Agriculture
VHF Very High Frequency
VTS Vessel Traffic System
WARC World Administrative Radio Conference
WRC World Radiocommunication Conference (formerly WARC)
Ám Micrometer (10-6 meter)
2-D 2-Dimensional
3-D 3-Dimensional

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