| Acronym | Meaning |
| ARMAR | Airborne Rain Mapping Radar |
| DAI | Data Assimilation Initiative |
| PD | Positive Definite |
| IRIS | Incorporated Research Institutions For Seismology |
| ISF | In-Situ Sensing Facility |
| ANL-E | Argonne National Laboratory-East |
| APAS | Astrophysical |
| GEMPAK | General Meteorological Package |
| CAMEX | Coastal AMOS (Experiment) |
| PDU | Protocol Data Unit |