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Earth, Planets and Space
Fig. 10 | Earth, Planets and Space

Fig. 10

From: An electric circuit model of the Earth’s polar electrojets and field-aligned currents for the estimation of magnetospheric magnetic field from along-track Swarm magnetic data

Fig. 10

The Swarm residuals \(\Delta X_{\mathrm{sm}}^{(1)}\) (solid red), \(\Delta Y_{\mathrm{sm}}^{(1)}\) (solid green) and \(\Delta Z^{(1)}\) (solid blue) along six Swarm A nightside full tracks (see Table 1) and their best fits by the regularised linear least squares (dashed lines) for \(\alpha ^2=2\times 10^{-10}\) nT\(^2\)A\(^{-2}\). The left, middle and right columns stand for the northern polar region, mid-latitudes and southern polar region, respectively. The vertical red lines in the left-hand and right-hand panels denote the estimated positions of the northern and southern auroral ovals, respectively; see Fig. 8. The mid-latitudes ranges between colatitudes \(\vartheta _{\mathrm{sm,R_2^n}}+10^\circ \) and \(\vartheta _{\mathrm{sm,R_2^s}}-10^\circ \) (vertical dashed violet lines)

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