| Acronym | Meaning |
 | ESSP | Earth System Science Pathfinder Mission (ESSP) |
| PPM | Part Per Million |
| ASPT | Advanced Satellite Products Team (NOAA/ORA) |
| ITOS | Improved Television And Infrared Observation Satellite (1970s) |
| WSGC | Wisconsin Space Grant Consortium |
| XBSS | X-ray Background Survey Spectrometer |
| FSL | Forecast Systems Laboratory (a NOAA ERL) |
| SHARP | Summer High School Apprenticeship Research Program (NASA) |
| DORIS | Doppler Orbitography And Radiopositioning Integrated By Satellite (EOS) |
| ATOVS | Advanced TIROS Operational Vertical Sounder |
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