Table 7 Accuracy comparison of 1st-level optimization and 2nd-level optimization
Index | Positioning errors of Bilinear SSP 2nd-level Opt in different directions (m) | Positioning errors of ESSP 2nd-level Opt in different directions (m) | ||||
|---|---|---|---|---|---|---|
E | N | U | E | N | U | |
Accuracy mean bias | − 0.0006 | 0. 0010 | − 0.0110 | − 0.0003 | − 0.0002 | 0.0148 |
Accuracy STD | 0.0027 | 0. 0049 | 0.0433 | 0.0021 | 0.0027 | 0.0238 |