Table 1. Number N of data points, mean, and rms misfit (in nT for the satellite data, and in nT/yr for the observatory data) for CHAOS-3α and CHAOS-3.
From: The CHAOS-3 geomagnetic field model and candidates for the 11th generation IGRF
CHAOS-3α | CHAOS-3 | |||||||
|---|---|---|---|---|---|---|---|---|
component | N | mean | rms | N | mean | rms | ||
satellite | all | F polar | 298,771 | −0.02 | 5.48 | 314,734 | −0.02 | 5.45 |
Fnonpolar +B B | 824,864 | 0.04 | 2.39 | 855,930 | 0.05 | 2.37 | ||
Ørsted | F polar | 114,312 | 0.92 | 4.27 | 120,549 | 0.96 | 4.25 | |
Fnonpolar + B B | 412,765 | 0.42 | 2.26 | 425,855 | 0.45 | 2.24 | ||
B ⊥ | 144,515 | −0.04 | 7.72 | 144,515 | −0.03 | 7.72 | ||
B 3 | 144,515 | −0.01 | 3.62 | 144,515 | −0.01 | 3.62 | ||
CHAMP | F polar | 149,130 | −0.86 | 6.63 | 158,856 | −0.89 | 6.57 | |
Fnonpolar + B B | 268,559 | −0.59 | 2.47 | 286,535 | −0.61 | 2.46 | ||
B ⊥ | 254,289 | 0.01 | 3.50 | 272,123 | 0.01 | 3.51 | ||
B 3 | 254,289 | 0.02 | 3.54 | 272,123 | 0.02 | 3.56 | ||
SAC-C | F polar | 35,329 | 0.02 | 4.21 | 35,329 | 0.02 | 4.19 | |
F nonpolar | 143,540 | 0.13 | 2.62 | 143,540 | 0.13 | 2.58 | ||
observatory | dX/dt | 15,756 | −0.26 | 7.26 | 16,493 | −0.28 | 7.15 | |
dY/dt | 15,756 | −0.12 | 4.91 | 16,493 | −0.12 | 4.81 | ||
dZ/dt | 15,756 | 0.10 | 6.88 | 16,493 | 0.17 | 6.68 | ||