Highlights TEC variability during solar eclipse of 21 June 2020. A time-lag of maximum phase of eclipse and TEC decrement is observed. Eclipse time TEC decrease depend upon the orbital track of respective satellites.
Abstract Ionospheric response during the annular solar eclipse of June 21, 2020, has been examined in terms of the Total Electron Content (TEC) obtained from six Global Positioning System (GPS) receivers positioned in the Chinese-Taiwanese region. We have shown TEC variation from satellites designated by PRNs (Pseudo-Random Noise code) 2, 6, and 19. PRN wise TEC trend was observed to depend upon satellite-pass trajectory to the receiver's location during the eclipse period. A time lag of ~15–30 min is also observed in maximum TEC decrement after the phase of maximum eclipse. Instead of the percentage of eclipse magnitude, a reduction in TEC is seen more for the station for which the orbital track of respective satellites was in closer view relative to receivers for more hours of eclipse window. Additionally, the eclipse day diurnal variations are compared with the pre-eclipse day TEC trend, and observed results show a clear decrease in TEC values at all chosen stations after the eclipse onset then reached the lowest value a few minutes afterward the maximum eclipse phase.
A study on TEC reduction during the tail phase of the 21st June 2020 annular solar eclipse
Advances in Space Research ; 67 , 6 ; 1948-1957
2020-12-25
10 pages
Article (Journal)
Electronic Resource
English