| Acronym | Meaning |
 | SR | Sunrise |
| UDB | Update Buffer |
| OVFL | Overf Low |
| PCA | Point Of Closest Approach |
| PV&D | Purge |
| LSO | Large Solar Observatory |
| SCDU | Signal Conditioning And Display Unit |
| PDR | Preliminary Data Requirements |
| TP | Transition Period (T.P. Preferred) |
| TP&C | Thermal Protection And Control |
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