| Acronym | Meaning |
| RFI | Radio Frequency Interference |
| AWSMSC | Air Weather Service Master Station Catalog |
| SID | Sudden Ionospheric Disturbance |
| TTO | Transient Tracers In The Ocean |
| AMBIENS | Atmospheric Mass Balance Of Industrially Emitted & Natural Sulfur |
| IDS | Interdisciplinary Study |
| NOMHICE | Nonmethane Hydrocarbon Intercomparison Experiment |
| RPM | Radiation And Particles Measurement |
| ERACF | Environmental Radiation Ambient Monitoring System |
| MFP | Mean Free Path |