Appendix F
Acronyms and Abbreviations

ACT Atacama Cosmology Telescope

AGN active galactic nucleus

ALMA Atacama Large Millimeter Array

AMSR-E Advanced Microwave Scanning Radiometer-Earth

AMSU Advanced Microwave Sounding Unit

ARM Atmospheric Radiation Monitoring

ARSR Air Route Surveillance Radars

ATA The Allen Telescope Array

ATMS Advanced Technology Microwave Sounder

AUI Associated Universities, Inc.

AVHRR Advanced Very High Resolution Radiometer

AWS Advanced Wireless Services

BOINC Berkeley Open Infrastructure for Network Computing

BRS/EBS Broadband Radio Service and Educational Broadband Service

CAPE connective available potential energy

CCAT Cornell Caltech Atacama Telescope

CFC chlorofluorocarbon

CMB cosmic microwave background

CME coronal mass ejection

CMIS Compact Microscope Imaging System

COBE Cosmic Background Explorer



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Appendix F Acronyms and Abbreviations ACT Atacama Cosmology Telescope AGN active galactic nucleus ALMA Atacama Large Millimeter Array AMSR-E Advanced Microwave Scanning Radiometer-Earth AMSU Advanced Microwave Sounding Unit ARM Atmospheric Radiation Monitoring ARSR Air Route Surveillance Radars ATA The Allen Telescope Array ATMS Advanced Technology Microwave Sounder AUI Associated Universities, Inc. AVHRR Advanced Very High Resolution Radiometer AWS Advanced Wireless Services BOINC Berkeley Open Infrastructure for Network Computing BRS/EBS Broadband Radio Service and Educational Broadband Service CAPE connective available potential energy CCAT Cornell Caltech Atacama Telescope CFC chlorofluorocarbon CMB cosmic microwave background CME coronal mass ejection CMIS Compact Microscope Imaging System COBE Cosmic Background Explorer 

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sPectrum management science 21st century  for in the CORF Committee on Radio Frequencies CR cognitive radio DDA direct data assimilation DFS dynamic frequency selection DIA Denver International Airport DMSP Defense Meteorological Satellite Program DOD Department of Defense ECV essential climate variable EDR Environmental Data Record EESS Earth Exploration-Satellite Service EIRP equivalent isotropically radiated power EOS Earth Observing System ESMR Electrical Scanning Microwave Radiometer ESTAR Electronically-Scanned Thinned Array Radiometer EVLA Expanded Very Large Array FASR Frequency Agile Solar Radiotelescope FCC Federal Communications Commission FS Fixed Service GBT Green Bank Telescope GCOM-W Global Change Observation Mission-Water GCOS Global Climate Observing System GEO geostationary orbit (satellite); Group on Earth Observations GEOSS Global Earth Observation System of Systems GFSC Goddard Space Flight Center GMI Global Precipitation Measurement-Microwave Imager GOES Geostationary Operational Environmental Satellites GPM Global Precipitation Measurement (mission) GPS Global Positioning System GR Einstein’s theory of general relativity HCFC hydrochlorofluorocarbon HFC hydrofluorocarbon HOMER Hybrid Optimization Model for Electric Renewables HSB Humidity Sounder for Brazil IPCC Intergovernmental Panel on Climate Change ITU International Telecommunication Union

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aPPendix f  ITU-R ITU Radiocommunication Sector ITU-RR ITU Radio Regulations IUCAF Scientific Committee on Frequency Allocations for Radio Astronomy and Space Science IWP ice water path JMR JASON Microwave Radiometer LEO low Earth orbit LI lifted index LIGO Laser Interferometer Gravitational Wave Observatory LISA Laser Interferometer Space Antenna LMS Land Mobile Service LMSS Land Mobile Satellite Service LMT Large Millimeter Telescope LWA Long Wavelength Array MEMS microelectromechanical systems MHS Microwave Humidity Sounder MIRAS Microwave Imaging Radiometer using Aperture Synthesis MIS Microwave Imager/Sounder MLS Microwave Limb Sounder MODIS Moderate Resolution Imaging Spectroradiometer MSU microwave sounding unit MWA Murchison Widefield Array NAIC National Astronomy and Ionosphere Center NASA National Aeronautics and Space Administration NEMS Nimbus-E Microwave Spectrometer NOAA National Oceanic and Atmospheric Administration NPOESS National Polar-orbiting Operational Environmental Satellite System NPRM notice of public rule making NRAO National Radio Astronomy Observatory NRC National Research Council NRQZ National Radio Quiet Zone NSF National Science Foundation NTIA National Telecommunications and Information Administration NWP numerical weather prediction OOB out-of-band (emissions)

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sPectrum management science 21st century  for in the PATH Precipitation and All-Weather Temperature and Humidity PECAD/CADRE Production Estimate and Crop Assessment Division’s Crop Condition Data Retrieval and Evaluation power flux density (usually measured in Wm–2) pfd PSR Polarimetric Scanning Radiometer PSU practical salinity unit PWV precipitable water vapor RAS Radio Astronomy Service RF radio frequency RFI radio frequency interference RMS root-mean-square RNSS Radionavigation Satellite Service RR Radio Regulations (the international treaty governing spectrum use) SAIR Synthetic Aperture Interferometric Radiometer SAR synthetic aperture radar SCLP Snow and Cold Land Processes SDR software-defined radio SETI Search For Extraterrestrial Intelligence SFMR Stepped Frequency Microwave Radiometer SIRICE Submillimeter Infrared Radiometer Ice Cloud Experiment SKA Square Kilometer Array SM soil moisture SMAP Soil Moisture Active Passive SMMR Scanning Multi-Channel Microwave Radiometer SMOS Soil Moisture Ocean Salinity SNR signal-to-noise ratio spectral power flux density (measured in Wm–2 Hz–1) spfd SPT South Pole Telescope SPTF Spectrum Policy Task Force SRS Space Research Service SSM/I Special Sensor Microwave Imager SSMI/S Special Sensor Microwave Imager/Sounder SSM/T Special Sensor Microwave/Temperature SSS sea surface salinity SST sea surface temperature SUBTEL Subsecretaría de Telecomunicaciones SSWV sea surface wind vector SWE snow water equivalent

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aPPendix f  TDM time-division multiplexing TDRSS Tracking and Data Relay Satellite System TIROS Television Infrared Observation Satellite TMI TRMM Microwave Imager TOPEX Topography Experiment TOVS TIROS Operational Vertical Sounder TRMM Tropical Rainfall Measuring Mission TTI total of totals index UAL United Airlines UWB ultrawideband VLA Very Large Array VLBA Very Long Baseline Array VLBI very long baseline interferometry WMTS Wireless Medical Telemetry Service WP7D ITU Working Party 7D WRC World Radiocommunication Conference