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Earth, Planets and Space
Fig. 4 | Earth, Planets and Space

Fig. 4

From: Improving the estimation of thermospheric neutral density via two-step assimilation of in situ neutral density into a numerical model

Fig. 4

The neutral mass density along the orbits of CHAMP and GRACE is plotted for a nine hour long period. The dashed vertical gray lines indicate the transits above the north pole and the dotted vertical gray lines the transits above the south pole. The calibrated NRLMSIS 2.0 time series was computed using scale factors filtered with a cut-off frequency of eight cpd

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