| Acronym | Meaning |
| ABLE | Activity Balance Line Evaluation |
| GSA | General Services Administration |
| IWG | Implementation Working Group |
| TDR | Tracking And Data Relay |
| UMASS | University Of Massachusetts |
| ERS-1 | European Remote Sensing Satellite 1 |
| IMD | Indian Meteorology Department |
| ODW | Omega Dropwindsonde |
| LLNL | Lawrence Livermore National Laboratory(ies) |
| DRA | Defense Research & Applications |