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Table 5 Model statistics of misfit between CHAOS-7 and CHAMP data

From: The CHAOS-7 geomagnetic field model and observed changes in the South Atlantic Anomaly

 

CHAMP

N

Mean

rms

\(F_\text {polar}\) (nT)

127,529

− 0.86

4.26

\(F_\text {non-polar}\) (nT)

223,744

− 0.53

1.85

\(B_r\) (nT)

223,744

0.05

1.80

\(B_\theta\) (nT)

223,744

0.29

2.48

\(B_\phi\) (nT)

223,744

0.04

2.08

\(\delta F_\text {AT, polar}\) (nT)

77,693

0.00

0.75

\(\delta F_\text {AT, non-polar}\) (nT)

154,347

0.00

0.26

\(\delta B_{r,\text {AT}}\) (nT)

111,546

− 0.00

0.38

\(\delta B_{\theta ,\text {AT}}\) (nT)

111,546

− 0.01

0.38

\(\delta B_{\phi ,\text {AT}}\) (nT)

111,546

− 0.00

0.40

  1. Mean and rms refer to Huber-weighted mean and rms values in units of nT. \(\delta {F_\text {AT}}\) and \(\delta {B_\text {AT}}\) denote along-track field differences calculated at 15-s spacing