Ionospheric Response to The Annular Solar Eclipse on 15th January 2010 As Observed by Ionosonde Receivers

Abstract

This paper presents the ionospheric behavior during the annular solar eclipse on the 15th January 2010 based on TEC measurements of six Ionosonde stations located in China and Japan. The selected stations had experienced partial solar eclipse with a magnitude between 60% and 90%. Results at these stations show a clear ITEC depletion occurrence during the period of eclipse. Comparison between the TEC level during the solar eclipse period with the ITEC on the day before, day after and the average quiet day TEC (QDITEC) reveals a significant drop in the TEC level in the range between 0.1% and 64%.