| Acronym | Meaning |
 | AOA | Angle Of Attack |
| E | Elliptical (for Galaxies) |
| MOPITT | Measurements Of Pollution In The Troposphere |
| DSSC | Deep Space Station Complex |
| ACR | Active Cavity Radiometer |
| AAVSO | American Association Of Variable Star Observers |
| CNES | Centre National D'Etude Spatiales |
| DOMSAT | Domestic Satellite |
| IMO | International Meteor Organization |
| SAR | Search And Rescue / Synthetic Aperture Radar |
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