| Acronym | Meaning |
 | LH | Liquid Hydrogen |
| NASA | National Aeronautics And Space Administration |
| AU | Astronomical Unit |
| OSSE | Oriented Scintillation Spectrometer Experiment |
| CTIO | Cerro Tololo Interamerican Observatory |
| UDMH | Unsymmetrical DiMethyl Hydrazine |
| ESO | European Southern Observatory |
| HUT | Hopkins Ultraviolet Telescope |
| TTC | Telemetry |
| SMM | Solar Maximum Mission |
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