| Acronym | Meaning |
| KTB | Cretaceous-Tertiary Boundary |
| UVS | Ultraviolet Spectrometer |
| FFCC | Free-Flyer Control Centre |
| NSSDC | National Space Science Data Center |
| DDTE | Design |
| SID | Sudden Ionospheric Disturbance |
| APU | Auxiliary Power Unit |
| FWHM | Full Width At Half Maximum |
| GR | General Relativity |
| FRSI | Flexible Reusable Surface Insulation |