| 3D | three dimensional |
| AIS | automatic identification system |
| ALMA | Atacama Large Millimeter/Submillimeter Array |
| AMR-2 | Advanced Microwave Radiometer-2 |
| AMSR2 | Advanced Microwave Scanning Radiometer 2 |
| AMSU-A | Advanced Microwave Sounding Unit-A |
| APEX | Atacama Pathfinder Experiment |
| ARO | Arizona Radio Observatory |
| ASAR | Advanced Synthetic Aperture Radar |
| ASCAT | Advanced Scatterometer |
| ASM | Applications Specific Message |
| ATMS | Advanced Technology Microwave Sounder (JPSS) |
| CAMLS | Compact Adaptable Microwave Limb Sounder |
| CEPT | European Post and Telecommunications Conference |
| CITEL | Inter-American Telecommunications Commission |
| CIWSIR | Cloud Ice Water Sub-millimetre Imaging Radiometer |
| CMB | cosmic microwave background |
| CS | carbon monosulfide |
| DMSP | Defense Meteorological Satellite Program |
| DOD | Department of Defense |
| DSM | dynamic spectrum management |
| EESS | Earth Exploration-Satellite Service |
| EoR | epoch of reionization |
| ESIM | Earth Stations in Motion |
| FAST | Five-hundred-meter Aperture Spherical Radio Telescope |
| FCC | Federal Communications Commission |
| FEMA | Federal Emergency Management Agency |
| FSS | Fixed-Satellite Service |
| FWA | fixed wireless access |
| FY-3 | Fēngyún satellite series (China) |
| GBT | Green Bank Telescope |
| GCOM-W1 | Global Change Observation Mission 1st-Water |
| GEM | Geosynchronous Microwave Sounder/Imager |
| GMDSS | Global Maritime Distress Safety Systems |
| GMI | GPM Microwave Imager |
| GOMAS | Geostationary Observatory for Microwave Atmospheric Sounding |
| GPM | Global Precipitation Measurement (NASA) |
| GPS | Global Positioning System |
| GSO | geostationary orbit |
| HAPS | High Altitude Platform Stations |
| HERA | Hydrogen Epoch of Reionization Array |
| HY-2A | Second-generation ocean observation/monitoring satellite series (China) |
| ICI | Ice Cloud Imager |
| IMT | International Mobile Telecommunications |
| ITU | International Telecommunication Union |
| JAXA | Japan Aerospace Exploration Agency |
| JCMT | James Clark Maxwell Telescope |
| JPSS | Joint Polar Satellite System |
| LLAMA | Large Latin American Millimeter Array |
| LOFAR | Low Frequency Array |
| MADRAS | Microwave Analysis and Detection of Rain and Atmospheric Structures |
| MASTER | Millimetre-wave Acquisitions for Stratosphere/Troposphere Exchange Research |
| MetOp-SG | Meteorological Operations—Second Generation |
| MTVZA-GY | Imaging/Sounding Microwave Radiometer-Improved (Russia) |
| MWA | Murchison Widefield Array |
| MWI | Microwave Imager |
| MWRI | Microwave Radiation Imager |
| MWRI′ | Microwave Radiometer Imager |
| NASA | National Aeronautics and Space Administration |
| NOAA | National Oceanic and Atmospheric Administration |
| NPP | National Polar-orbiting Partnership |
| NSF | National Science Foundation |
| OH | hydroxyl radical |
| OOBE | out-of-band emission |
| PMR | passive microwave radiometry |
| RAS | Radio Astronomy Service |
| RCM | Radarsat Constellation Mission |
| RF | radio frequency |
| RFI | radio frequency interference |
| RISAT | Radar Imaging Satellite |
| RLAN | Radio Local Area Networks |
| RR | radio regulations |
| RSS | radio source scintillation |
| SiO | silicon monoxide |
| SKA | Square Kilometer Array |
| SKAMP | SKA Molongolo Prototype |
| SMA | Submillimeter Array |
| SMAP | Soil Moisture Active Passive |
| SMOS | Soil Moisture and Ocean Salinity |
| SMT | Submillimeter Telescope (ARO) |
| SPT | South Pole Telescope |
| SSM/I | Special Sensor Microwave Imager |
| SSMIS | Special Sensor Microwave Imager/Sounder |
| STEAM-R | Stratosphere-Troposphere Exchange and Climate Monitor-Radiometer |
| TEC | total electron content |
| TWICE | Tropospheric Water Vapor and Cloud ICE |
| VDES | VHF Data Exchange System |
| VLA | Very Large Array |
| WAS | wireless access system |
| WRC | World Radiocommunication Conference |