| Acronym | Meaning |
| AO&SS | Atmospheric |
| MSG | Meteosat Second Generation |
| ATOVS | Advanced TIROS Operational Vertical Sounder |
| MSS | Multi-Spectral Scanner |
| EPS | European Polar Satellite |
| AVIRIS | Airborne Visible InfraRed Imaging Spectrometer (JPL) |
| CH4 | Methane |
| LAWS | Laser Atmospheric Wind Sounder (EOS) |
| GMT | Greenwich Mean Time (repl. By UTC) |
| ENSO | El Ni?o/Southern Oscillation |