| Acronym | Meaning |
 | AAO | Anglo-Australian Observatory |
| LDEF | Long Duration Exposure Facility |
| CREAM | Cosmic Radiation Effects And Activatiom Monitor |
| LHA | Local Hour Angle |
| ELV | Expendable Launch Vehicle |
| MODIS-T | MODIS-Tilt |
| IAPPP | International Amateur/Professional Photoelectric Photometry |
| SOHO | SOlar Heliospheric Observatory |
| GNC | Guidance |
| APT | Automatic Picture Transmission |
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