| Acronym | Meaning |
 | USDC | United States Department Of Commerce |
| ORU | Orbital Replacement Unit |
| AAS | American Astronomical Society |
| SAWRS | Supplementary Aviation Weather Reporting System |
| NACCAM | National Coordinating Committee On Aviation Meteorology |
| LVDT | Linear Variable Differential Transformer |
| CE | Combustion Engineering |
| TIME-GCM | Thermosphere-ionosphere-mesosphere-electrodynamic General Circulation Model |
| OMR | Optical Mark Reader |
| ALADIN | Atmospheric Laser Doppler Instrument |
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