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Table 3 The normalized secular variation misfit \(\mathcal {J}_{\text {sv}}\) obtained for different combinations of parameters during the initialization process

From: A candidate secular variation model for IGRF-12 based on Swarm data and inverse geodynamo modelling

Inflation factor β Crustal covariance C c \(\mathcal {J}_{\text {sv}}\)
3.8 yes 2.42
95.7 yes 0.99
95.7 no 1.18
383.0 yes 0.77
2393.5 yes 0.66
  1. The first column reports the value of the inflation factor β. The crustal covariance C c column indicates whether that matrix is incorporated into the analysis. See text for details