| Acronym | Meaning |
![](file.png) | ACR | Active Cavity Radiometer |
![](file.png) | GRS | Gamma Ray Spectrometer |
![](file.png) | TDRS | Tracking And Data Relay Satellite |
![](file.png) | VTVL | Vertical Takeoff Vertical Landing |
![](file.png) | EUMETSAT | European Meterological Satellite Organisation |
![](file.png) | OPF | Orbiter Processing Facility |
![](file.png) | FUSE | Far Ultraviolet Spectroscopic Explorer |
![](file.png) | MOMV | Manned Orbital Maneuvering Vehicle |
![](file.png) | ALPO | Association Of Lunar And Planetary Observers |
![](file.png) | EGRET | Energetic Gamma Ray Experiment Telescope |