| Acronym | Meaning |
 | WARN | Weather-Auto Relay Network |
| SPOT | Systeme Pour L'Observation De La Terre (France) |
| OPLE | Omega Position Location Equipment |
| EF | Emission Factor |
| HRM | High Rate Multiplexer |
| UNCED | United Nations Conference On Environment And Development |
| RAWINS | Radio Wind Measurements |
| AFOSR | Air Force Office Of Scientific Research |
| DID | Data Item Description |
| NAS | National Airspace System |
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