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Suggested Citation:"Appendix B: Acronyms and Abbreviations." National Academies of Sciences, Engineering, and Medicine. 2021. Views of the U.S. National Academies of Sciences, Engineering, and Medicine on Agenda Items at Issue at the World Radiocommunication Conference 2023. Washington, DC: The National Academies Press. doi: 10.17226/26080.
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Page 74
Suggested Citation:"Appendix B: Acronyms and Abbreviations." National Academies of Sciences, Engineering, and Medicine. 2021. Views of the U.S. National Academies of Sciences, Engineering, and Medicine on Agenda Items at Issue at the World Radiocommunication Conference 2023. Washington, DC: The National Academies Press. doi: 10.17226/26080.
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Page 75
Suggested Citation:"Appendix B: Acronyms and Abbreviations." National Academies of Sciences, Engineering, and Medicine. 2021. Views of the U.S. National Academies of Sciences, Engineering, and Medicine on Agenda Items at Issue at the World Radiocommunication Conference 2023. Washington, DC: The National Academies Press. doi: 10.17226/26080.
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Page 76
Suggested Citation:"Appendix B: Acronyms and Abbreviations." National Academies of Sciences, Engineering, and Medicine. 2021. Views of the U.S. National Academies of Sciences, Engineering, and Medicine on Agenda Items at Issue at the World Radiocommunication Conference 2023. Washington, DC: The National Academies Press. doi: 10.17226/26080.
×
Page 77
Suggested Citation:"Appendix B: Acronyms and Abbreviations." National Academies of Sciences, Engineering, and Medicine. 2021. Views of the U.S. National Academies of Sciences, Engineering, and Medicine on Agenda Items at Issue at the World Radiocommunication Conference 2023. Washington, DC: The National Academies Press. doi: 10.17226/26080.
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Page 78

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B Acronyms and Abbreviations ACT Atacama Cosmology Telescope AI Agenda Item ALMA Atacama Large Millimeter/submillimeter Array ALOS Advanced Land Observing Satellite AMR Advanced Microwave Radiometer AMR-C Advanced Microwave Radiometer – Climate quality AMS Aeronautical Mobile Service AMSR2 Advanced Microwave Scanning Radiometer 2 AMSR3 Advanced Microwave Scanning Radiometer 3 AMSU-A Advanced Microwave Sounding Unit A APEX Atacama Pathfinder Experiment APR Airborne Precipitation Radar ARO Arizona Radio Observatory ATCA Australia Telescope Compact Array ATMS Advanced Technology Microwave Sounder (JPSS) BICEP-Keck The BICEP and Keck arrays of small CMB telescopes CEPT European Post and Telecommunications Conference CFOSAT Chinese-French Oceanography Satellite CFR Code of Federal Regulations (US) CH methyladyne CH3OH methanol CIMR Copernicus Imaging Microwave Radiometer (ESA) CIR Coronal Interaction Region CITEL Inter-American Telecommunications Commission CLASS Cosmology Large Angular Scale Surveyor ClO chlorine monoxide CMA China Meteorological Administration CMB cosmic microwave background CME coronal mass ejection CNPC Control and Non-Payload Communications CNSA China National Space Administration CO carbon monoxide COMPIRA Coastal and Ocean Measurement mission with Precise and Innovative Radar Altimeter (JAXA) CONAE Comisión Nacional de Actividades Espaciales (Argentinian space agency) CS carbon monosulfide dB decibel PREPUBLICATION COPY – SUBJECT TO FURTHER EDITORIAL CORRECTION 74

dBW decibel watt [power in dBW = 10 log10 (Power/1W)] DLITE Deployable Low Frequency Ionosphere and Transient Experiment DMSP Defense Meteorological Satellite Program DoD Department of Defense DPR Dual frequency Precipitation Radar DSM Dynamic Spectrum Management EESS Earth Exploration-Satellite Service EIRP Equivalent Isotropically Radiated Power EOP Earth Orientation Parameters epfd equivalent power flux density ESA European Space Agency ESAA Earth Stations Aboard Aircraft ESIM Earth Stations in Motion EUMETSAT European Meteorological Satellite agency EVN European VLBI Network FAA Federal Aviation Administration FAST Five-hundred-meter Aperture Spherical Radio Telescope FEDOME Fédération des Données Météorologiques de l’Espace (France) FEMA Federal Emergency Management Agency FFT Fast Fourier Transform FS Fixed Service FSS Fixed-Satellite Service GBT Green Bank Telescope GCOM-W Global Change Observation Mission – Water GHz gigahertz [109 Hz] GLT Greenland Telescope GMDSS Global Maritime Distress Safety Systems GMI GPM Microwave Imager GNSS Global Navigation Satellite Service GOSAT-GW Greenhouse Gas Observing Satellite – Gasses and Water cycle GPM Global Precipitation Measurement (NASA) GPS Global Positioning System GSO geostationary orbit H2O water HartRAO Hartebeesthoek Radio Astronomy Observatory HCN hydrogen cyanide HCO+ formylium HF High Frequency [3-30 MHz] HIBS High-altitude platform stations as IMT Base Stations HIRAX Hydrogen Intensity and Real-time Analysis eXperiment HNO3 nitric acid Hz Hertz ICI Ice Cloud Imager (ESA) IEEE Institute of Electrical and Electronics Engineers IFOV Instantaneous Field of View IMO International Maritime Organization PREPUBLICATION COPY – SUBJECT TO FURTHER EDITORIAL CORRECTION 75

IMT International Mobile Telecommunications IRAM Institute for Radio Astronomy in the Millimeter Range ISRO Indian Space Research Organization ITU International Telecommunication Union JASON Joint Altimetry Satellite Oceanography Network JAXA Japan Aerospace Exploration Agency JCMT James Clark Maxwell Telescope JPSS Joint Polar Satellite System kHz kilohertz [103 Hz] KP Kitt Peak KVN Korean VLBI Network LEO low Earth orbit LMS Land Mobile Service LMT Large Millimeter Telescope LOFAR Low Frequency Array LoFASM Low Frequency All Sky Monitor LWA Long Wavelength Array m meter MENA Middle East and North Africa MERLIN Multi-Element Radio Linked Interferometer Network MHz megahertz [106 Hz] MicroMAS Microsized Microwave Atmospheric Satellite MLS Microwave Limb Sounder MSS Mobile-Satellite Service MTVZA-GY “Module for Temperature and Humidity Sounding of the Atmosphere – G.Ya.Guskov” (Russian) MWA Murchison Widefield Array MWI Microwave Imager MWR Microwave Radiometer MWRI Microwave Radiation Imager NANTEN2 Second Nanten (南天, Southern Sky) telescope NASA National Aeronautics and Space Administration NenuFAR New Extension in Nançay Upgrading LOFAR NEO near Earth objects NEXRAD Next Generation Weather Radar ngVLA Next Generation Very Large Array NISAR NASA ISRO SAR NO nitric oxide NOAA National Oceanic and Atmospheric Administration NOEMA Northern Extended Millimeter Array NPOESS National Polar Orbiting Environmental Satellite NPP NPOESS Preparatory Program NRAO National Radio Astronomy Observatory NSF National Science Foundation NSOAS National Satellite Ocean Application Service (China) PREPUBLICATION COPY – SUBJECT TO FURTHER EDITORIAL CORRECTION 76

O3 ozone OH hydroxyl radical OOBE out-of-band emission ORFEES Observation Radiospéctrale pour FEDOME et les Etudes des Eruptions Solaires OSCAT OceanSat Scatterometer PALSAR Phased Array Type L-Band SAR POLARBEAR Name of a CMB experiment, formerly an acronym QTT Qitai Radio Telescope RA Radio Astronomy RA.769 Recommendation ITU-R RA.769 contains threshold levels considered harmful to RAS RAS Radio Astronomy Service RF radio frequency RFI radio frequency interference RNSS Radionavigation-Satellite Service RR Radio Regulations RR 5.149 Footnote RR 5.149 lists frequency bands for which Administrations are urged to take all practicable steps to protect radio astronomy RR 5.340 Footnote RR 5.340 lists frequency bands for which all emissions are prohibited RRL Radio Recombination Line RS Remote Sensing RS.2017 Recommendation ITU-R RS.2017 contains threshold levels considered harmful to EESS RT Radio Telescope SAOCOM Satélite Argentino de Observación Con Microondas SAR Synthetic Aperture Radar SHF Super High Frequency [3–30 GHz] SIRAL SAR Interferometric Radar Altimeter SiO silicon monoxide SKA Square Kilometre Array SMA Submillimeter Array SMAP Soil Moisture Active Passive SMOS Soil Moisture and Ocean Salinity SMR Submillimeter Radiometer SMT Sub-Millimeter Telescope (ARO) SO2 sulfur dioxide spfd spectral power flux density SPT South Pole Telescope SRAL Synthetic aperture Radar Altimeter SRS Space Research Service SSM/I Special Sensor Microwave Imager SSMIS Special Sensor Microwave Imager/Sounder SWE snow water equivalent SWIM Surface Waves Investigation and Monitoring SWOT Surface Water and Ocean Topography TGRS Transactions on Geoscience and Remote Sensing TMI TRMM Microwave Imager TRAO Taeduk Radio Astronomy Observatory PREPUBLICATION COPY – SUBJECT TO FURTHER EDITORIAL CORRECTION 77

TRMM Tropical Rain Fall Measurement Mission TROPICS Time-Resolved Observations of Precipitation structure and storm Intensity with a Constellation of Smallsats TWICE Tropospheric Water Vapor and cloud Ice UAS unmanned aircraft systems UHF Ultra High Frequency [300–3000 MHz] USAID U.S. Agency for International Development USDA U.S. Department of Agriculture USGS U.S. Geological Survey VERA VLBI Exploration of Radio Astrometry VHF Very High Frequency [30-300 MHz] VLA Very Large Array VLBA Very Long Baseline Array VLBI Very Long Baseline Interferometry VLF Very Low Frequency [3-30 kHz] W watt WISM Wideband Instrument for Snow Measurements WRC World Radiocommunication Conference WSF Weather Satellite Follow-on WSR Weather Surveillance Radar PREPUBLICATION COPY – SUBJECT TO FURTHER EDITORIAL CORRECTION 78

Views of the U.S. National Academies of Sciences, Engineering, and Medicine on Agenda Items at Issue at the World Radiocommunication Conference 2023 Get This Book
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The radio frequency spectrum is a limited resource for which there is an ever-increasing demand from an expansive range of applications - all the way from commercial, such as mobile phones, to scientific, such as hurricane monitoring from space. Since radio waves do not stop at national borders, international regulation is necessary to ensure effective use of the radio spectrum for all parties. Use of the radio spectrum is regulated internationally by the Radio Regulations (RR), an international treaty. The International Telecommunication Union (ITU) has as its mission the facilitation of the efficient and interference-free use of the radio spectrum. Every 2 to 5 years, the ITU convenes a World Radiocommunication Conference (WRC) to review and revise the international RR. Changes to the RR are formulated through proposals to the conference according to Agenda Items, which are agreed on at the previous WRC.

At the request of the National Science Foundation and the National Aeronautics and Space Administration, this report provides guidance to U.S. spectrum managers and policymakers as they prepare for the 2023 WRC to protect the scientific exploration of Earth and the universe using the radio spectrum. This report identifies the 2023 agenda items of relevance to U.S. radio astronomers and Earth remote sensing researchers, along with proposed agenda items for the 2027 WRC.

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