| Acronym | Meaning |
 | IAPPP | International Amateur/Professional Photoelectric Photometry |
| ETM | Enhanced Thematic Mapper |
| HRPT | High Resolution Picture Transmission |
| CMB | Cosmic Microwave Background |
| ADFRF | Ames-Dryden Flight Research Facility |
| GRU | Glavnoye Razvedivatel'noye Upravileniye |
| MNRAS | Monthly Notices Of The Royal Astronomical Society |
| BFS | Backup Flight System |
| PMIRR | Pressure Modulated InfraRed Radiometer |
| DOR | Differenced One-way Range |
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