| Acronym | Meaning |
 | USDI | United States Department Of Interior |
| EPO | Estuarine Programs Office |
| AF | Auxiliary Feed |
| M-PDU | Multiplexed Protocol Data Unit |
| HRSR | High Resolution Scanning Radiometer |
| TAS | True Air Speed |
| (ES) | Sporadic E |
| ABRV | Advanced Ballistic Re-entry Vehicle |
| ANM | Alternate Nuclear Materials |
| ELDO | European Launcher Development Organization |
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