| Acronym | Meaning |
 | ESSA | Environmental Science Services Administration (preceded NOAA) |
 | ESE | Earth Science Enterprise (NASA) |
 | NESDIS | National Environmental Satellite |
 | MISR | Multi-angle Imaging Spectro-Radiometer (EOS) |
 | K | Kilo |
 | COMSAT | COMmunications SATellite |
 | APP | AVHRR Polar Pathfinder |
 | STEP | Satellite Technology Education Program (WSGC) |
 | TES | Tropospheric Emission Spectrometer (EOS) |
 | PPM | Part Per Million |