| Acronym | Meaning |
| TMR | TOPEX Microwave Radiometer (EOS) |
| APP | AVHRR Polar Pathfinder |
| EARTHKAM | Earth Knowledge Acquired By Middle-schoolers |
| HZ | Hertz |
| NOAA | National Oceanic And Atmospheric Administration |
| GMS | Geostationary Meteorological Satellite |
| CH4 | Methane |
| ASPT | Advanced Satellite Products Team (NOAA/ORA) |
| IMG | Interferometric Monitor For Greenhouse Gases |
| CAC | Climate Analysis Center |