| Acronym | Meaning |
![](file.png) | BD | Bonner Durchmusterung (catalog) |
![](file.png) | GSC | Guide Star Catalog |
![](file.png) | HDE | Henry Draper Extension |
![](file.png) | ELV | Expendable Launch Vehicle |
![](file.png) | SAR | Search And Rescue / Synthetic Aperture Radar |
![](file.png) | MMS | Multi-mission Modular Spacecraft |
![](file.png) | TIROS | Television InfraRed Observation Satellite |
![](file.png) | TKSC | Tsukuba Space Center |
![](file.png) | POP | PO Polyot |
![](file.png) | COSTAR | Corrective Optics Space Telescope Axial Replacement |