Fig. 9From: Co-estimating geomagnetic field and calibration parameters: modeling Earth’s magnetic field with platform magnetometer dataTime-longitude maps of the radial SA up to degree 10 on the Equator at the CMB as computed with Model-B (left), Model-A (center) and their difference, Model-B minus Model-A (right). The gap period between CHAMP and Swarm is in between the black dashed lines (Sep 2010–Nov 2013)Back to article page