| Acronym | Meaning |
| EPA | Environmental Protection Agency (U.S.) |
| EUMETSAT | EUropean Organization For The Exploitation Of METeorological SATellites |
| FTS | Fourier Transform Spectrometer (HIS |
| IMG | Interferometric Monitor For Greenhouse Gases |
| TOS | TIROS Operational Satellite |
| STEP | Satellite Technology Education Program (WSGC) |
| NASA | National Aeronautics And Space Administration |
| KB/S | Kilobits Per Second |
| CCR | Center For Climatic Research (IES) |
| EM | ElectroMagnetic |