| Acronym | Meaning |
| CSA | Canadian Space Agency |
| OCTS | Ocean Color And Temperature Scanner |
| HUT | Hopkins Ultraviolet Telescope |
| SAMPEX | Solar Anomalous And Magnetospheric Particle EXplorer |
| DMR | Differential Microwave Radiometer |
| DOR | Differenced One-way Range |
| GIF | Graphics Interchange Format |
| CRRES | Combined Release/Radiation Effects Satellite |
| CEA | Center For EUV Astrophysics |
| S | Spiral (for Galaxies) |