| Acronym | Meaning |
 | AXAF | Advanced X-ray Astrophysics Facility |
| LPATS | Lightning Position And Tracking System |
| AC | Ancho Canyon |
| PD | Positive Definite |
| EMO | Environmental Management Office |
| SFC OR SFC | Surface |
| FPS | Feet Per Second |
| URSI | International Union Of Radio Science |
| PRIMO | Problems Related To Ionospheric Modeling And Observations Project |
| AMS | Accelerator Mass Spectrometer |
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