| Acronym | Meaning |
| DCA | Defense Communications Agency |
| OSS | Office Of The Space Station |
| GEODSS | Ground-based Electro-optical Deep-space Surveillance System |
| MISR | Multiangle Imaging Spectro-Radiometer |
| ACRIM | ACR Irradiance Monitor |
| AOCS | Attitude And Orbit Control System |
| GMT | Greenwich Mean Time |
| NRO | National Reconnaissance Office |
| CADH | Communications And Data Handling |
| HLV | Heavy Lift Vehicle |