| Acronym | Meaning |
 | DPSS | DATA Processing Services Subsystem |
| UIT | Ultraviolet Imaging Telescope |
| RA | Right Ascension |
| PDE | Particle Dispersion Experiment |
| SAIL | Shuttle Avionics Integration Laboratory |
| GEO | Geosynchronous Earth Orbit |
| BFC | Backup Flight Computer |
| ROSAT | ROentgen Satellite |
| HIRIS | High Resolution Imaging Spectrometer |
| ISZ | Iskusstvenniy Sputnik Zemli |
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