Fig. 6.From: Prediction of geomagnetic field with data assimilation: a candidate secular variation model for IGRF-11The time averaged error of each degree l and order m from 2004 to 2009. The filled and unfilled bars are for the real and the imaginary parts of respectively. The harmonic mode index (x axis) is defined such that it increases from the value 1 for the mode (l = 1, m = 0), with the order that l increases from 1 to 8 and, for given l, m increases from 0 to l.Back to article page