| Acronym | Meaning |
 | ET | Evapotranspiration |
| TID | Traveling Ionospheric Disturbance |
| CB | Cumulonimbus |
| RA | Radio Antenna |
| FPD | Facilities Planning And Design |
| IWG | Implementation Working Group |
| ESA | Endangered Species Act |
| SUDOOS | Sun/UNIX DICOMED Online Operating System |
| EM | Engineering Model |
| PAGE | Program For The Advancement Of Geoscience Education |
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