Table 2 Comparison of estimated ERPs to the IERS-14-C04 series
Solution | X pole (\(\upmu\)as) | Y pole (\(\upmu\)as) | LOD (\(\upmu\)s) | |||||
|---|---|---|---|---|---|---|---|---|
Sol. | Orbits | Bias | Mean | RMS | Mean | RMS | Mean | RMS |
SLR to GNSS-only | ||||||||
1 | Estimated from SLR | Annual bias (sat & sta) | 102 | 682 | 16 | 523 | − 5 | 168 |
2 | Fixed to a priori GNSS | Annual bias (sat & sta) | 88 | 428 | − 9 | 461 | 31 | 95 |
3 | Fixed to a priori GNSS | Estimated every week (sat & sta) | 72 | 617 | 38 | 520 | − 1 | 87 |
4 | Fixed to a priori GNSS | Estimated every week (sys & sta) | 66 | 466 | 41 | 493 | 31 | 94 |
SLR to LAGEOS + GNSS | ||||||||
5 | LAGEOS-only | – | 78 | 157 | 52 | 143 | − 82 | 123 |
6 | LAGEOS + GNSS (freely est.) | Annual bias (sat & sta) | 82 | 154 | 55 | 143 | 26 | 69 |
7 | LAGEOS + GNSS (fixed) | Annual bias (sat & sta) | 74 | 149 | 51 | 141 | 1 | 43 |
8 | LAGEOS + GNSS (fixed) | Estimated every week (sat & sta) | 85 | 201 | 59 | 218 | 4 | 44 |