Fig. 3From: Ionospheric responses to the 21 August 2017 solar eclipse by using data assimilation approachThe latitude-time variations of TEC along the magnetic field line (shown in the bottom panel of Fig. 1d) from the assimilation results on the eclipse previous day (a) and the eclipse day (b), and the difference (c) between the TEC of a and b. The white circle indicates the latitude and the time of the maximum obscuration of the solar eclipseBack to article page