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Table 9 Statistics of the misfit between CHAOS-7 predictions and independent validation data, that was not used in the CHAOS-7 model construction

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

  Validation dataset CHAOS-7 dataset
N Mean rms Mean rms
Ground Obs RMM SV
 \(\text {d}B_r/\text {d}t\) (nT/year) 909 0.01 3.95 0.13 4.30
 \(\text {d}B_\theta /\text {d}t\) (nT/year) 909 − 0.35 3.79 − 0.24 4.17
 \(\text {d}B_\phi /\text {d}t\) (nT/year) 909 0.09 3.31 0.04 3.93
Swarm scalar
 F (nT) 5989 − 1.37 5.76 0.19 4.18
 \(F_{\text{polar}}\) (nT) 3771 − 1.67 6.49 0.61 6.62
 \(F_{\text{non-polar}}\) (nT) 2127 − 0.84 4.16 − 0.04 1.96
  1. Mean and rms residuals are calculated without Huber-weighting, in contrast to earlier tables. Similar statistics for the data used in the construction of the CHAOS-7 model are also shown for reference