| ACRIM | Active Cavity Radiometer Irradiance Monitor |
| CDR | Climate Data Record |
| CLARREO | Climate Absolute Radiance and Refractivity Observatory |
| ERBE | Earth Radiation Budget Experiment |
| FF-1 | Free Flyer-1 |
| GOES-R | Geostationary Operational Environmental Satellite, R-Series |
| IRMB | Royal Meteorological Institute of Belgium(L’Institut royal météorologique de Belgique) |
| JPSS | Joint Polar Satellite System |
| LASP | Laboratory for Atmospheric and Space Physics |
| NASA | National Aeronautics and Space Administration |
| NIST | National Institute of Standards and Technology |
| NOAA | National Oceanic and Atmospheric Administration |
| NPOESS | National Polar-orbiting Operational Environmental Satellite System |
| NRC | National Research Council |
| NRL | Naval Research Laboratory |
| PMOD | Physikalisch-Meteorologisches Observatorium Davos |
| PREMOS | PREcision Monitor Sensor |
| SATIRE-S | Spectral And Total Irradiance Reconstruction model - Satellite era |
| SIM | Spectral Irradiance Monitor |
| SOHO | Solar and Heliospheric Observatory satellite |
| SOLSTICE | Solar Stellar Irradiance Comparison Experiment |
| SORCE | Solar Radiation and Climate Experiment |
| SSI | Solar Spectral Irradiance |
| TCTE | TSI Calibration Transfer Experiment |
| TIM | Total Irradiance Monitor |
| TRF | TSI Radiometer Facility |
| TSI | Total Solar Irradiance |
| TSIS | Total Solar Irradiance Sensor |
| USGCR | PU.S. Global Change Research Program |
| VIRGO | Variability of solar Irradiance and Gravity Oscillations |