Fig. 17From: Simultaneous inversion for source field and mantle electrical conductivity using the variable projection approachRelative inducing field difference and coherence of the Q-response. The top panel shows the relative difference between \(\varepsilon _2^1\) estimates from Gauss method and VP, and the bottom panel shows the coherence of \(Q_2\) estimated from Gauss-method-derived \(\varepsilon _2^1\) and \(\iota _2^1\)Back to article page