| Acronym | Meaning |
| EU | European Union |
| CALCRUST | Consortium For Study Of The California Crust |
| UN | United Nations |
| VIS-UV | Visible/ultraviolet Spectrometer |
| METOBS | N/A |
| PMB | Performance Measurement Baseline |
| MPA | Maintenance Purchase Award |
| DARPA | Defense Advanced Research Projects Agency |
| L2D2 | Lightweight LORAN Digital Dropsonde |
| IPS | Inches Per Second |