| Acronym | Meaning |
 | IUE | International Ultraviolet Explorer |
| PPF | Columbus Polar Platform |
| SUSIM | Solar Ultraviolet Spectral Irradiance Monitor |
| GC | Globular Cluster |
| SAR | Search And Rescue / Synthetic Aperture Radar |
| ASE | Advanced Space Engine |
| AIRS | Atmospheric Infrared Sounder |
| RCT | Radiometric Calibration Target |
| USO | Ultra-Stable Oscillator |
| FIRAS | Far InfraRed Absolute Spectrophotometer |
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