| ALMA | Atacama Large Mm/SubMm Array |
| AM(R)S | aeronautical mobile (R) service |
| AMSR2 | Advanced Microwave Scanning Radiometer 2 |
| AMSR- E | Advanced Microwave Scanning Radiometer-Earth |
| AMSU-A | Advanced Microwave Sounding Unit |
| ARNS | Aeronautical Radionavigation Service |
| ARO | Arizona Radio Observatory |
| ATMS | JPSS’s Advanced Technology Microwave Sounder |
| CI | neutral carbon |
| CIWSIR | Cloud Ice Water Sub-millimetre Imaging Radiometer |
| CSO | Caltech Submillimeter Observatory |
| DMSP | Defense Meteorological Satellite Program |
| DOD | Department of Defense |
| EESS | Earth Exploration-Satellite Service |
| EIRP | equivalent isotropically radiated power |
| EOS Aqua | EOS Aqua (NASA) |
| GEM | Geosynchronous Microwave Sounder/Imager |
| GMI | GPM Microwave Imager |
| GOMAS | Geostationary Observatory for Microwave Atmospheric Sounding |
| GPM | Global Precipitation Measurement (NASA) |
| HAPS | high-altitude platform stations |
| HSO | Herschel Space Observatory |
| ITU | International Telecommunication Union |
| JAXA | Japan Aerospace Exploration Agency |
| JCMT | James Clark Maxwell Telescope |
| JPSS | Joint Polar Satellite System |
| LWA | Long Wavelength Array |
| MASTER | Millimetre-wave Acquisitions for Stratosphere/Troposphere Exchange Research |
| MIS | Microwave Imager Sounder (JPSS) |
| MLS | Microwave Limb Sounder |
| MWA | Murchison Widefield Array |
| MWI | Microwave Imager |
| NASA | National Aeronautics and Space Administration |
| NiCT | National Institute of Information and Communications Technology (Japan) |
| NOAA | National Oceanic and Atmospheric Administration |
| NRC | U.S. National Research Council |
| NSF | National Science Foundation |
| OOB | out of band |
| OSCR | Ocean Surface Current Radar |
| PREMIER | Process Exploration Through Measurement of Infrared and Millimeter-wave Emitted Radiation |
| RAS | Radio Astronomy Service |
| RFI | radio frequency interference |
| SAFIR | Single Aperture Far-Infrared Observatory |
| SM | soil moisture |
| SMA | Submillimeter Array |
| SMILES | Submillimeter-Wave Limb Emission Sounder |
| SMMR | Scanning Multichannel Microwave Radiometer |
| SMT | Sub-Millimeter Telescope (ARO) |
| SOFIA | Stratospheric Observatory for Far-Infrared Astronomy |
| SOPRANO | Sub-millimeter Observations of Processes in the Atmosphere Noteworthy for Ozone |
| SPT | South Pole Telescope |
| SSB | single-sideband |
| SSM/I | Special Sensor Microwave Imager |
| SSMI/S | Special Sensor Microwave Imager/Sounder |
| SST | sea surface temperature |
| TMI | TRMM Microwave Imager |
| TRMM | Tropical Rain Fall Measurement Mission |
| UAS | unmanned aircraft systems |
| WERA | wave radar systems |
| WMO | World Meteorological Organization |
| WRC | World Radiocommunication Conference |