Fig. 4

The time series of electron density difference percentages at the fixed longitude of − 100^oE on 260 km altitude (a) and 42^oN latitude plane (b). The red line in a indicates the latitude and the time of the total eclipse. The white line in a indicates the time of maximum obscuration. The vertical white lines in b indicate the time of start, maximum obscuration, and end of solar eclipse. These are 1631 UT, 1755 UT, and 1922 UT, respectively. The white cross in b is denoted the altitude and the time of maximum depletion