| Acronym | Meaning |
 | VEH | Vehicle |
| M+R | Time In Days Before Move Operations |
| OTLC | Orbiter Timeline Constraints |
| PSS | Propellant Supply Subsystem |
| ESTEC | European Space Research And Technology Center |
| FCOS | Flight Computer Operating System (Orbiter) |
| FQI | Flight Qualification Instrumentation |
| GSO | Ground Support Operations |
| DRD | Document Requirement Description |
| LARS | Laminar Angular Rate Sensor |
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