| Acronym | Meaning |
 | ECU | Environmental Crimes Unit |
| AAS | American Astronomical Society |
| IASP | International Atmospheric Surveillance Program |
| WICHE | Western Interstate Commission For Higher Education |
| AVC | Advanced Vector Computer |
| LOS | Loss Of Signal |
| NSRC | National Systems And Research Company |
| PCM | Pulse Code Modulation |
| RSCS | Remote Spooling Communications Subsystem |
| ESTEC | European Space Research And Space Technology Centre |
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