Comment on the paper“Total solar eclipse of July 22,2009:Its impact on the total electron content and ionospheric electron density in the Indian zone”by Sharma et al.

作     者：Huijun Le~*,Libo Liu,Yiding Chen Beijing National Observatory of Space Environment,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing,China 

会议名称：《中国科学院地质与地球物理研究所第11届（2011年度）学术年会》

会议日期：2012年

学科分类：070802[理学-空间物理学] 07[理学] 0708[理学-地球物理学] 

基　　金：supported by National Natural Science Foundation of China(40725014,41074112 and 41004069) the Specialized Research Fund for State Key Laboratories, and the CMA grant(GYHY201106011) China Postdoctoral Science Foundation funded project(20090460045) 

关 键 词：Solar eclipse Equatorial ionosphere IRI model Numerical simulation 

摘      要：By analyzing COSMIC data,Sharma et al.(2010) found more than 50%reduction in electron density during a solar eclipse at the F2-layer and above,with the peak of 0%at 370 *** great eclipse effect on topside ionosphere was very abnormal and much different from previous ***,by comparing the cosmic data with IRI results,we find that the abnormal reduction comes mainly from the significant local time variation at sunrise,not from the eclipse ***,we simulated the eclipse effect by using a theoretical model to confirm our analysis.