| Acronym | Meaning |
 | USMP | United States Microgravity Payload |
 | JPL | Jet Propulsion Laboratory |
 | PMC | Permanently Manned Capability |
 | MIMR | Multifrequency Imaging Microwave Radiometer |
 | TDRS | Tracking And Data Relay Satellite |
 | EOS | Electrophoresis Operations In Space |
 | AGB | Asymptotic Giant Branch |
 | LDEF | Long Duration Exposure Facility |
 | NASDA | NAtional Space Development Agency |
 | ET | Ephemeris Time |