| Acronym | Meaning |
 | TOVS | TIROS Operational Vertical Sounder |
| EOS | Earth Observing System |
| NCEP | National Centers For Environmental Prediction (form. NMC; NWS Center) |
| NCDC | National Climatic Data Center |
| MB | Millibar(s) |
| GPS | Global Positioning System |
| EPA | Environmental Protection Agency (U.S.) |
| DOIT | Department Of Information Technology (UW-MSN) |
| HSB | Humidity Sounder For Brazil |
| CERES | Clouds And The Earth's Radiant Energy System (EOS) |
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