| Acronym | Meaning |
| DOR | Differenced One-way Range |
| NTT | New Technology Telescope |
| SNG | Sodruzhestva Nezabisimikh Gosudarst |
| CM | Center Of Mass |
| CTIO | Cerro Tololo Interamerican Observatory |
| MPESS | Multiple Purpose Experiment Support Structure |
| BECO | Booster Engine Cutoff |
| LARC | Langley Research Center |
| SMEX | Small EXplorers |
| DLR | Deutsche Forschungsanstalt Fuer Luft- Und Raumfahrt |