Fig. 8From: A harmonic spline magnetic main field model for Southern Africa combining ground and satellite data to describe the evolution of the South Atlantic Anomaly in this region between 2005 and 2010Maps of main field of Z component between 2005 and 2010. Maps of the Z main field model derived from CHAMP satellite and ground data at six selected epochs between 2005 and 2010 (first two rows) and the change of the field between 2005.5 and 2010.5 epochs (last row) at 0.8Â km altitudeBack to article page