| Acronym | Meaning |
 | PM | Pressurized Module |
| RGB | Red Giant Branch |
| LPV | Long Period Variable |
| WMO | World Meterological Organisation |
| FRED | Space Station Freedom |
| MPESS | Multiple Purpose Experiment Support Structure |
| GSO | GeoSynchronous Earth Orbit |
| CSM | Command And Service Module |
| DOR | Differenced One-way Range |
| VTHL | Vertical Takeoff Horizontal Landing |
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