| Acronym | Meaning |
| RCT | Radiometric Calibration Target |
| PMT | PhotoMultiplier Tube |
| VMS | Vertical Motion Simulator |
| ECS | Environmental Control System |
| LPO | La Palma Observatory |
| DRAO | Dominion Radio Astrophysical Observatory |
| TOPEX | Ocean Topography Experiment |
| GRU | Glavnoye Razvedivatel'noye Upravileniye |
| NIR | Near InfraRed |
| MODIS-T | MODIS-Tilt |