| Acronym | Meaning |
| TDM | Three-dimensional Time-varying Mesoscale Model |
| SAWRS | Supplementary Aviation Weather Reporting System |
| TGCM | Thermospheric General Circulation Model |
| MSIS | Mass Spectrometer And Incoherent Scatter |
| UM | University Of Michigan |
| AGA | Automatic Gas Analyzer |
| PSN | Piano Spaziale Nazionale |
| BOMEX | Barbados Oceanographic And Meteorological Experiment |
| ALJ | Administrative Law Judge |
| (ES) | Sporadic E |