Skip to main content
Fig. 9 | Earth, Planets and Space

Fig. 9

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

Fig. 9

For the first four analysis steps, the average ratio of the standard deviation of the NRLMSIS 2.0, and the model forecast are plotted for each level of the data grid. A value of one means that both have the same uncertainty. Values greater than one indicate that the observation error is larger than the forecast error. The solid line is the median computed over all layers of the data grid at the corresponding color coded analysis step. The shaded area marks the interval between the 25th and 75th percentile

Back to article page