| Acronym | Meaning |
 | UMF | User Master File |
| ADM | Atomic Demolition Munition |
| GEM | Geospace Environment Modeling Program |
| R&D | Research And Development |
| GSFC | Goddard Space Flight Center |
| EAC | Employee Activities Committee |
| LM | Large Model |
| RDF | Real-data Forecast |
| LASP | Laboratory For Atmospheric And Space Physics |
| LIE | Line Islands Experiment |
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