Comparison Analysis Across Different Onboard Clock and Orbit Types
As the clock SWaP increases (indicating a higher-grade clock), the timing stability is correspondingly less sensitive to the choice of orbit type.
| RMS Timing Error in Clock Type | ELFO | NRHO | LLO | PCO | |
|---|---|---|---|---|---|
| Microchip | Bias (μs) | 4.05 × 10−2 | 3.83 × 10−2 | 6.79 × 10−2 | 4.08 × 10−2 |
| CSAC | Drift (ns/s) | 4.07 × 10−2 | 4.01 × 10−2 | 4.19 × 10−2 | 4.04 × 10−2 |
| Microchip | Bias (μs) | 2.13 × 10−2 | 2.15 × 10−2 | 2.78 × 10−2 | 2.17 × 10−2 |
| MAC | Drift (ns/s) | 0.81 × 10−2 | 0.81 × 10−2 | 0.81 × 10−2 | 0.83 × 10−2 |
| SRS | Bias (μs) | 1.76 × 10−2 | 1.77 × 10−2 | 2.13 × 10−2 | 1.78 × 10−2 |
| PRS10 | Drift (ns/s) | 0.45 × 10−2 | 0.46 × 10−2 | 0.45 × 10−2 | 0.46 × 10−2 |
| Excelitas | Bias (μs) | 1.23 × 10−2 | 1.21 × 10−2 | 1.43 × 10−2 | 1.21 × 10−2 |
| RAFS | Drift (ns/s) | 0.15 × 10−2 | 0.15 × 10−2 | 0.15 × 10−2 | 0.15 × 10−2 |
| NASA’s | Bias (μs) | 0.79 × 10−2 | 0.76 × 10−2 | 0.87 × 10−2 | 0.74 × 10−2 |
| DSAC | Drift (ns/s) | 0.36 × 10−3 | 0.35 × 10−3 | 0.36 × 10−3 | 0.35 × 10−3 |