| Acronym | Meaning |
 | HEAO | High Energy Astronomical Observatory |
| DSCS | Defense Satellite Communications System |
| SECO | Sustainer Engine Cutoff |
| GUGK | Glavnoye Upravileniye Geodesii I Kartografii |
| SSO | Spurious Shut-off |
| VMS | Vertical Motion Simulator |
| SAT | Synthetic Aperture Telescope |
| IRFNA | Inhibited Red Fuming Nitric Acid |
| MISR | Multiangle Imaging Spectro-Radiometer |
| RESTEC | Remote Sensing Technology Center |
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