Fig. 4From: Co-estimation of geomagnetic field and in-orbit fluxgate magnetometer calibration parametersa Residual histograms for all satellites and field components used in Model A. b Residual histograms for ground observatory secular variation dataset used in Model A. Histograms are normalized to have unit area. Nonpolar histograms are calculated from residual data equatorward of \(55^{\circ }\) QD latitude, while polar histograms use residuals poleward of \(55^{\circ }\)Back to article page