| Acronym | Meaning |
 | GAC | Global Area Coverage |
| PGGA | Permanent GPS Geodetic Array |
| SAGE | Stratospheric Aerosol And Gas Experiment |
| FOLD | Federally Owned LANDSAT Data |
| GTCP | Global Tropospheric Chemistry Program |
| NAPAP | National Acid Precipitation Assessment Program |
| DCSL | Distributed CSL |
| CAM | Constant Air Monitor |
| AEERL | Air And Energy Engineering Research Laboratory |
| SUSIM | Solar Ultraviolet Spectral Irradiance Monitor |
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