| Acronym | Meaning |
| ESOC | European Satellite Operations Center |
| KSC | Kennedy Space Center |
| UHF | Ultra High Frequency |
| RAOB | RAdiosonde OBservation |
| NPOESS | National Polar-orbiting Operational Environmental Satellite System |
| ERSC | Environmental Remote Sensing Center (IES) |
| IMG | Interferometric Monitor For Greenhouse Gases |
| AIRS | Atmospheric InfraRed Sounder (EOS) |
| FTS | Fourier Transform Spectrometer (HIS |
| GEOSAT | GEOdetic SATellite |