Fig. 8
From: First results from the Swarm Dedicated Ionospheric Field Inversion chain
(Normalized) primary equivalent current function \({\varPsi }_1\), DIFI-2015b model, for January 1, \({\mathrm{{UT}}}=0,\) 6, 12 and 18, and \(F_{10.7}=100\) SFU. \({\varPsi }_1\) is normalized by the maximum value for all seasons. A 13.1 kA current flows between the contours. The dip equator is depicted as a thick black line