Fig. 2From: Ionospheric responses to the 21 August 2017 solar eclipse by using data assimilation approachThe altitude-latitude variations of electron density profile from the assimilation results on the eclipse previous day (a) and the eclipse day (b) and the difference (c) between the results of a and b, along the magnetic field line (shown in the bottom panel of Fig. 1d) at 1730 UT (top panels), 1830 UT (middle panels), and 1930 UT (bottom panels), respectively. The black line in c indicates the electric field perturbations between the eclipse day and the previous dayBack to article page