| Acronym | Meaning |
| EGRET | Energetic Gamma Ray Experiment Telescope |
| DOE | Department Of Energy |
| SOFIA | Stratospheric Observatory For Infrared Astronomy |
| SLC | Space Launch Complex |
| PDE | Particle Dispersion Experiment |
| IRFNA | Inhibited Red Fuming Nitric Acid |
| SAO | Smithsonian Astrophysical Observatory |
| PHA | Physics And Astronomy |
| KAO | Kuiper Airborne Observatory |
| IR | InfraRed |