| Acronym | Meaning |
| OSO | Orbiting Solar Observatory |
| OAO | Orbiting Astronomical Observatory |
| HSB | Humidity Sounder For Brazil |
| SSU | Stratospheric Sounding Unit (TOVS) |
| HIRS | High-resolution Infrared Radiation Sounder |
| ERSC | Environmental Remote Sensing Center (IES) |
| MCIDAS | Man Computer Interactive Data Access System |
| AERI | Atmospheric Emitted Radiance Interferometer |
| AMSU | Advanced Microwave Sounder Unit (EOS) |
| ESE | Earth Science Enterprise (NASA) |