| Acronym | Meaning |
 | SID | Sudden Ionospheric Disturbance |
| REU | Research Experiences For Undergraduates |
| AWQC | Ambient Water Quality Criteria |
| GRP | Geophysical Research Program |
| EDC | EROS Data Center |
| ALAP | As Low As Practical |
| BAC | Boeing Airplane Company |
| DCA | Washington National Airport |
| CAT | Coordinated Analysis Of The Thermosphere |
| HMS | Hungarian Meteorological Service |
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