| Acronym | Meaning |
| H2O | Water (vapor) |
| ENSO | El Ni?o/Southern Oscillation |
| S-HIS | Scanning High Resolution Interferometer Sounder |
| IMAPP | International MODIS/AIRS Processing Package |
| BIT | Binary Digit |
| OAO | Orbiting Astronomical Observatory |
| AERI | Atmospheric Emitted Radiance Interferometer |
| XBSS | X-ray Background Survey Spectrometer |
| UV | UltraViolet |
| SSEC | Space Science And Engineering Center |