Fig. 1.From: Prediction of geomagnetic field with data assimilation: a candidate secular variation model for IGRF-11The mean square defined in (12) at the top of D″-layer of the forecasts yf (the dashed line) and of the observations y (the solid line) from 1994 to 2002. The forecasts from the analysis time 1994 are made by MoSST_DAS (with a 20 km D″-layer thickness); while the observations y are from the CM4.Back to article page