| Acronym | Meaning |
| AU | Astronomical Unit |
| AVIRIS | Airborne Visible InfraRed Imaging Spectrometer (JPL) |
| EPS | European Polar Satellite |
| CSBT | Clear-Sky Brightness Temperature |
| DXS | Diffuse X-ray Spectrometer |
| ECMWF | European Centre For Medium-range Weather Forecasts |
| AERI | Atmospheric Emitted Radiance Interferometer |
| BIT | Binary Digit |
| CPC | Climate Prediction Center (NWS Center) |
| VISIT | Virtual Institute For Satellite Integration Training (NWS) |