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Earth, Planets and Space
Fig. 7 | Earth, Planets and Space

Fig. 7

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. 7

The magnetic field components \(X_{\mathrm{sm}}\) (red), \(Y_{\mathrm{sm}}\) (green) and \(\Delta Z\) (blue) measured by a satellite vector magnetometer for four hypothetic cases. The vertical dashed violet lines show the position of Region 1 and Region 2. Panel A: A satellite flies in the meridional plane of two semi-infinite long line wires carrying currents of the opposite directions. Panel B: The same as panel A, but the meridional plane contains the down and up field-aligned currents flowing along the field lines of the geomagnetic dipole. Panel C: The same as panel B, but the meridional plane of a satellite orbit is rotated by 2\(^\circ \) from the meridional plane of the currents. Panel D: The same as panel C, but the distance between Region 1 and Region 2 is reduced to 0.5\(^\circ \)

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