| 3D | three dimensional |
| ACE | Advanced Composition Explorer |
| ACSWA | American Commercial Space Weather Association |
| ADAPT | Air Force Data Assimilative Photospheric flux Transport |
| AFRL | Air Force Research Laboratory |
| AMPERE | Active Magnetosphere Polar Electrodynamics Response Experiment |
| ARMAS | Automated Radiation Measurement for Aviation Safety |
| BBSO | Big Bear Solar Observatory |
| CCMC | Community Coordinated Modeling Center (NASA) |
| CCOR | compact coronagraph |
| CIRES | Cooperative Institute for Research in Environmental Sciences |
| CME | coronal mass ejection |
| COSMIC | Constellation Observing System for Meteorology, Ionosphere and Climate |
| CSA | Canadian Space Agency |
| CSFC | Canadian Space Weather Observations and Forecasts Centre |
| CWDP | commercial weather data program |
| D3S | Distributed Space Weather Sensor System |
| DASI | Distributed Array of Small Instruments |
| DKIST | Daniel K. Inouye Solar Telescope |
| DMSP | Defense Meteorological Satellites Program |
| DOC | Department of Commerce |
| DoD | Department of Defense |
| DOE | Department of Energy |
| DSCOVR | Deep Space Climate Observatory |
| EMP | electromagnetic pulse |
| EO | Executive Order |
| EOP | Executive Office of the President |
| EOVSA | Expanded Owens Valley Solar Array |
| ESA | European Space Agency |
| EUMETSAT | European Organisation for the Exploitation of Meteorological Satellites |
| EUV | extreme ultraviolet |
| EXIS | Extreme Ultraviolet and X-ray Irradiance Sensors |
| FEMA | Federal Emergency Management Agency |
| FERC | Federal Energy Regulatory Commission |
| GCR | galactic cosmic ray |
| GDC | Geospace Dynamics Constellation |
| GEO | geostationary orbit |
| GIC | geomagnetically induced current |
| GMD | geomagnetic disturbance |
| GNSS | Global Navigation Satellite System |
| GOES | Geostationary Operational Environmental Satellite |
| GOLD | Global-scale Observations of the Limb and Disk |
| GONG | Global Oscillations Network Group |
| GOX | GPS occultation experiment |
| GPS | Global Positioning System |
| GRAS | GNSS Receiver for Atmospheric Sounding |
| GSFC | Goddard Space Flight Center (NASA) |
| HAF | Hakamada-Akasofu-Fry (solar wind model) |
| HAO | High-Altitude Observatory |
| HEMP | high-altitude electromagnetic pulse |
| HERMES | Heliophysics Environmental and Radiation Measurement Experiment Suite |
| HPD | Heliophysics Division |
| ICME | interplanetary mass ejection |
| ICON | Ionospheric Connection Explorer |
| ICSWIAS | International Committee for Space Weather Impacts to Aviation Safety |
| IDA | Institute for Defense Analyses |
| IDIQ | Indefinite Delivery Indefinite Quantity |
| IMAGE | Imager for Magnetopause-to-Aurora Global Exploration |
| IMAP | Interstellar Mapping and Acceleration Probe |
| IoT | Internet of Things |
| ISEP | Integrated Solar Energetic Proton Event Alert/Warning System |
| ISES | International Space Environment Service |
| ISRO | Indian Space Agency |
| ISS | International Space Station |
| ISTO | Ionospheric Scintillation TEC Observatory |
| IVM | ion velocity meter |
| JAXA | Japan Aerospace Exploration Agency |
| JPSS | Joint Polar Satellite System |
| KMA | Korea Meteorological Administration |
| LANL | Los Alamos National Laboratory |
| LASCO | Large Angle and Spectrometric Coronagraph |
| LASP | Laboratory for Atmospheric and Space Physics |
| LEO | low Earth orbit |
| LWS | Living With a Star |
| MAG | magnetometer |
| Metop | Meteorological Operational satellite |
| MHD | magneto hydro-dynamics |
| MIDEX | Medium-Class Explorer |
| MLSO | Mauna Loa Solar Observatory |
| MOU | memorandum of understanding |
| NAPA | National Academy of Public Administration |
| NASA | National Aeronautics and Space Administration |
| NCAR | National Center for Atmospheric Research |
| NCEI | National Center for Environmental Information |
| NCEP | National Centers for Environmental Prediction, NOAA |
| NERC | North American Electric Reliability Corporation |
| NESDIS | National Satellite Data and Information Service (NOAA) |
| NEXION | Next Generation Ionosonde |
| NEXT | Iridium 2nd Generation Satellite Constellation |
| ngGONG | Next Generation Global Oscillations Network Group |
| ngRH | Next Generation Radioheliograph |
| NGDC | National Geophysical Data Center, NOAA |
| NICT | National Institute of Information and Communications Technology (Japan) |
| NOAA | National Oceanic and Atmospheric Administration |
| NOP | Refers to the N, O, and P satellites in the fourth generation of the GOES satellite system |
| NORAD | North American Aerospace Defense Command |
| NRAO | National Radio Astronomy Observatory |
| NRCan | Natural Resources Canada |
| NSF | National Science Foundation |
| NSO | National Solar Observatory |
| NSOSA | NOAA Satellite Observing System Architecture |
| NSPO | National Space Organisation (Taiwan) |
| NSTC | National Science and Technology Council |
| NSWAP | National Space Weather Action Plan |
| NSWP | National Space Weather Program |
| NSWS | National Space Weather Strategy |
| NSW-SAP | National Space Weather Strategy and Action Plan |
| NWS | National Weather Service (NOAA) |
| O2R | operations to research |
| OADR | open architecture data repository |
| OES | Bureau of Oceans and International Environmental and Scientific Affairs (Department of State) |
| ONR | Office of Naval Research |
| OSC | Office of Space Commerce (Department of Commerce) |
| OSTP | Office of Science and Technology Policy |
| PLASMAG | Plasma-Magnetometer (PlasMag) |
| PNT | positioning, navigation, and timing |
| POES | Polar-orbiting Environmental Satellite |
| PPP | Presidential Policy Directive |
| PROBA | Project for Onboard Autonomy |
| PROSWIFT | Promoting Research and Observations of Space Weather to Improve the Forecasting of Tomorrow |
| PUNCH | Polarimeter to Unify the Corona and Heliosphere |
| R2O | research to operations |
| R2O2R | research to operations-operations to research |
| R&D | research and development |
| RF | radio frequency |
| RO | radio occultation |
| RSTN | Radio Solar Telescope Network |
| RSTU | Refers to the R, S, T, and U satellites in the latest generation of the GOES satellite system |
| SDO | Solar Dynamics Observatory |
| SECHHI | Sun-Earth Connection Coronal and Heliospheric Investigation |
| SEISS | Space Environment In-Situ Suite |
| SEM | Space Environmental Monitor |
| SEON | Solar Electro-Optical Network |
| SEP | solar energetic particle |
| SHOES | Solar-Heliospheric Optical Environment Satellites |
| SMEX | Small Explorer |
| SOHO | Solar and Heliospheric Observatory |
| SOON | Solar Optical Observing Network |
| SpaceWOC | Space Weather Operations Center (USAF) |
| SPD | space policy directive |
| SPE | solar particle event |
| SRAG | Space Radiation Group (NASA) |
| SRB | solar radio burst |
| SSA | space situational awareness |
| STEREO | Solar Terrestrial Relations Observatory |
| STM | space traffic management |
| SuperDARN | Super Dual Auroral Radar Network |
| SUVI | Solar Ultraviolet Imager |
| SWC | Space Weather Center |
| SWEP | Severe Weather Emergency Plan |
| SWFO | Space Weather Forecast Office |
| SWGC | Space Weather as a Global Challenge |
| SWIS | Solar Wind Instrument Suite |
| SWORM | Space Weather Operations, Research, and Mitigation |
| SWPC | Space Weather Prediction Center (NOAA) |
| SWRI | Southwest Research Institute |
| SWXC | global space weather center |
| SXI | Solar X-ray Imager |
| TEC | total electron content |
| TGRS | Tri-GNSS Radio-Occultation System |
| THEMIS | Time History of Events and Macroscale Interactions during Substorms Mission |
| THIRA | Threat and Hazard Identification and Risk Assessment |
| TRACERS | Tandem Reconnection and Cusp Electrodynamics Reconnaissance Satellites |
| ULF | ultralow frequency |
| UN | United Nations |
| USAF | U.S. Air Force |
| USGS | U.S. Geological Survey |
| VLF | very low frequency |
| WAM-IPE | Whole Atmosphere Model-Ionosphere Plasmasphere Electrodynamics |
| WOC | Weather Operations Center |
| WSA | Wang-Sheeley-Arge Model |