Earth, Planets and Space

Table 1 Summary of TMD and electron density (Ne) correlation coefficient of reference (R\(_r\)) and analysis (R\(_a\)) and RMSE improvement (IMP) for along the orbit of different satellites observations

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

Satellite	Parameter	R\(_r\)	R\(_a\)	IMP\(_q\) (%)	IMP\(_m\) (%)	IMP\(_r\) (%)	IMP\(_s\) (%)
Swarm-B	TMD (400km)	0.63	0.82	18	32	52	35
Swarm-C	TMD (400km)	0.61	0.83	19	38	59	40
Swarm-A	Ne	0.43	0.71	2	3	33	8
GRACE	Ne	0.67	0.85	13	12	52	22

Improvement is separated by storm phases: quiet, main, recovery (q,m,r) and the complete storm (s)

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