Study on the Es responses of annular solar eclipse on June 21 of 2020

To study the evolution of irregularity of the ionosphere Es irregularities during the annular solar eclipse, we conducted a joint observation experiment using the VHF coherent scattering radar and a portable ionosonde system during the annular solar eclipse on 21 June, 2020. The results show that the variation of h′Es and f_oEs reduces first and then increases during the annular solar eclipse, which is similar to the effect of rapid sunrise and sunset on the irregularities in the ionosphere Es irregularities. The reason is that the solar activity as the radiation source experiences a rapid weakening and recovery process during the annular solar eclipse. The observation results of this experiment are of great significance to improve the formation mechanism of Es irregularities.