Fig. 11From: Improving the estimation of thermospheric neutral density via two-step assimilation of in situ neutral density into a numerical modelDensities along the orbits of CHAMP and GRACE from various sources. The x axis is limited to a period where KP is always larger than or equal to 5 and contains the largest KP value of \(7\frac{2}{3}\) in the experiment (9:00–12:00). The dotted vertical lines mark the analysis stepsBack to article page