| Acronym | Meaning |
 | PICRS | Service |
| POPU | Push Over Pull Up |
| MCW | Modulated Continuous Wave |
| LFAM | Low Frequency Accelerometer Modes |
| T-0 | Time Zero |
| LMK | Landmark |
| SPF | Software Production Facility |
| LOS | Loss Of Sync |
| RSF | Refurbishment And Subassembly Facilities |
| GCTS | Ground Communication(s) Tracking System |
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