Fig. 11From: Co-estimation of geomagnetic field and in-orbit fluxgate magnetometer calibration parametersTime/longitude maps of secular acceleration in the \(B_r\) component (top row) and third time derivative of \(B_r\) (bottom row) at the core mantle boundary along the geographic equator. Maps are generated using spherical harmonic degrees 1 to 10 for Model A (left column) and CHAOS-6-x9 (right column). Dashed lines indicate gap period between CHAMP and SwarmBack to article page