| Acronym | Meaning |
| EUMETSAT | EUropean Organization For The Exploitation Of METeorological SATellites |
| TMR | TOPEX Microwave Radiometer (EOS) |
| ADEOS | ADvanced Earth Observing Satellite (Japan) |
| ERS | ESA Remote Sensing Satellite |
| MB | Millibar(s) |
| NPOESS | National Polar-orbiting Operational Environmental Satellite System |
| H2O | Water (vapor) |
| ACRIM | Active Cavity Radiometer Irradiance Monitor (EOS) |
| M | Meter(s) |
| AURA | Association Of Universities For Research In Astronomy |