| Acronym | Meaning |
 | RR | Requirements Review |
| MTO | Mission |
| MOM | Moment |
| OSOP | Orbiter Systems Operating Procedures |
| QAVT | Qualification For Acceptance Vibration Testing |
| VEEI | Vehicle Electrical Engine Interface |
| NPU | Nitrogen Purge Unit |
| MTBMA | Mean Time Between Maintenance Action |
| SCS | Spacecraft Control System |
| EA | Elevation Angle |
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