| Acronym | Meaning |
| SIR | Spaceborne Imaging Radar |
| SDM | Suit Of Software For UNIX-based Computing Platforms |
| ACE | Alliance For Clean Energy |
| Z | Reflectivity (Lenschow) Or Reflective Factor (FOF) |
| DDF | Digital Data Formatter |
| SID | Sudden Ionospheric Disturbance |
| OGP | Office Of Global Programs |
| ESPIRIT | European Strategic Programme For R&D In Information Technology |
| YAG | Yttrium |
| HESS | Health |