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Earth, Planets and Space
Fig. 5 | Earth, Planets and Space

Fig. 5

From: Improving estimates of the ionosphere during geomagnetic storm conditions through assimilation of thermospheric mass density

Fig. 5

Electron density reference (red), analysis (blue) and B-Spline model (green) regression against observations along the orbit a Swarm-A and b GRACE. The regression fit (straight line) is represented with its confidence interval (shadowed area). The correlation improves from reference to analysis in both cases and the B-Spline model exhibits a very strong correlation with the measurements. The RMSE improvement between reference and analysis separated by satellite and storm phases (c), shows the data assimilation upgrade increasing with the storm periods, with an average value of approximately 8% for Swarm-A and 22% for GRACE

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