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Table 1 Variances prescribed to the three components of mid-latitude (ML) and high-latitude (HL) vector data

From: A secular variation candidate model for IGRF-13 based on Swarm data and ensemble inverse geodynamo modelling

Component Mid-latitude High-latitude
X \(9\, \hbox { nT}^2\) \(100\, \hbox { nT}^2\)
Y \(9\, \hbox { nT}^2\) \(144\, \hbox {nT}^2\)
Z \(36\, \hbox {nT}^2\) \(100\, \hbox {nT}^2\)