| Acronym | Meaning |
 | ESSCO | Environmental Science & Services Corporation |
| APA | Administrative Procedures Act |
| IGU | International Geographical Union |
| GTF | Ground Test Facility |
| EH | Oxidation Potential |
| ECA | Earth-crossing Asteroids |
| ALT/RA | Altimeter/Radar Altimeter |
| TIME-GCM | Thermosphere-Ionosphere-Mesosphere-Electrodynamic General Circulation Model |
| PACS | Pan-American Climate Studies |
| SAS | Small Astronomy Satellite |
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