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Table 1 Root mean square and mean differences (in nT) for the two parent models and for Swarm A and C. The B misfit corresponds to intensity rms difference computed from the VFM dataset. F misfits are sorted with respect to the magnetic absolute latitude 50°

From: Main field and secular variation candidate models for the 12th IGRF generation after 10 months of Swarm measurements

  Root mean square difference Mean difference
Model Sat. B X B Y B Z B F ≤50 F >50 B X B Y B Z B F ≤50 F >50
V-ASM A 4.10 3.94 2.71 3.05 3.07 8.93 0.12 0.72 0.16 −0.09 0.01 −0.46
V-ASM C 4.19 4.49 3.10 3.03 3.11 9.31 0.32 1.41 −0.07 0.19 0.18 −0.26
Z-ASM A 4.38 4.14 2.51 3.04 3.05 8.91 0.58 0.74 0.23 −0.03 0.04 −0.14
Z-ASM C 4.46 4.72 2.88 3.02 3.09 9.29 0.80 1.49 −0.04 −0.33 0.01 0.20