| Acronym | Meaning |
| DFDR | Digital Flight Data Recorder |
| ADI | Air Defense Initiative |
| ERS | Element Requirements Specification |
| LTE | Local Thermodynamic Equilibrium |
| MTL | Message Transfer Layer |
| JPL | Jet Propulsion Laboratory |
| GGI | GPS Geoscience Instrument |
| OCG | Ocean Catalog Group |
| JHU | Johns Hopkins University |
| PASE | Polar Air-Show Experiment |