Fig. 3From: COV-OBS.x2: 180 years of geomagnetic field evolution from ground-based and satellite observationsHistograms of the normalized data misfit \(e^*\) for the GO and VO datasets (separated all three components). In black is the normalized Gaussian curve \({\mathcal{N}}(\mu , \sigma )\) with \(\mu \) the mean and \(\sigma \) the standard deviation of the normalized misfits (see Table 2)Back to article page