POGO satellite orbit corrections: an opportunity to improve the quality of the geomagnetic field measurements?

Earth, Planets and Space

Table 3 Residual statistics of the revised satellite positions used in the single-day approach

	N	min_res (nT)	max_res (nT)	μ _res (nT)	σ _res (nT)
Original data	7911	−90.337	64.600	−0.773	15.050
Starting data	7907	−85.292	63.558	−0.311	14.319
1. Iteration	7919	−79.485	59.828	0.002	13.730
2. Iteration	7926	−73.672	57.002	0.200	13.196
3. iteration	7932	−67.552	52.559	0.370	12.616
4. Iteration	7931	−63.245	49.945	0.473	12.240
5. Iteration	7932	−58.522	46.838	0.604	11.821
6. Iteration	7934	−52.706	48.095	0.746	11.493
7. Iteration	7936	−47.413	48.373	0.826	11.239
8. Iteration	7935	−42.317	49.143	0.925	11.040
9. Iteration	7934	−38.428	49.794	1.058	10.926
10. Iteration	7930	−38.127	49.749	1.119	10.851
11. Iteration	7925	−37.869	49.991	1.222	10.858
12. Iteration	7920	−37.882	50.546	1.254	10.939

Note that the magnetospheric field predictions from xCHAOS have always been removed for the modelling and residual calculations. N is the number of measurements which could be used for the modelling, min_res is the minimum residual, max_res the maximum residual, μ _res is the mean residual and σ _res is the corresponding residual rms