Table 2 Statistics of our IGRF-13 candidate SV model with respect to observatory measurements. Columns show residual mean (\(\mu\)) and standard deviation (\(\sigma\)) for the model minus observatory spline fits for epoch 2020.0. The residuals are computed from observatory data within \(\pm 55^{\circ }\) geomagnetic dipole latitudes

From: NOAA/NCEI and University of Colorado candidate models for IGRF-13