| Acronym | Meaning |
| TOVS | TIROS Operational Vertical Sounder |
| ITS | Interferometer Thermal Sounder (HIS) |
| MLS | Microwave Limb Sounder (EOS) |
| S-HIS | Scanning High Resolution Interferometer Sounder |
| AOT | Aerosol Optical Thickness |
| SAGE | Stratospheric Aerosol And Gas Experiment (EOS) |
| TES | Tropospheric Emission Spectrometer (EOS) |
| AC | Alternating Current |
| MCIDAS | Man Computer Interactive Data Access System |
| ER-2 | Earth Resources (plane) |