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《Chinese Journal of Geophysics》 2016-01
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Variation of the plasmaspheric electron content derived from the podTEC observations of COSMIC LEO satellites to GPS signals

ZHANG Man-Lian;LIU Li-Bo;WAN Wei-Xing;NING Bai-Qi;Key Laboratory of Earth and Planetary Physics,Institute of Geology and Geophysics,Chinese Academy of Sciences;  
We tried to study the variations of the plasmaspheric electron content(PEC)using the PEC data derived from the podTEC observation of the COSMIC low Earth orbit(LEO)satellite to the GPS satellite signals.We first give a brief introduce to the method we used to convert the slant podTEC to the vertical PEC.Then we used the converted PEC data of the year 2008 to study the variations of PEC with the geomagnetic latitude(MLAT),magnetic local time(MLT)and with four different seasons.Besides,we made a study on the longitudinal variation of PEC using the extracted PEC data from two different longitudes(120°E and 300°E).Our study showed that:(1)The distribution of PEC is mainly confined to a region within ±45°of the magnetic equator of the Earth;(2)PEC shows a well-defined diurnal variation pattern withhigher values during daytime hours than during nighttime hours.PEC reaches its peak value at the hour around 12—16MLT,whereas it reaches its minimum value at around 4—5MLT.(3)PEC has a lowest value in the June solstice season(May—August)compared with other seasons.(4)PEC shows an evident longitudinal variation and it has different seasonal variations for different longitudes.
【Fund】: 国家自然科学基金(41274163);国家自然科学基金创新群体项目(41321003);国家自然科学基金重点项目(41231065)资助;; 国家重点基础研究发展计划(973计划)(2012CB825604);; 中国科学院重点部署项目(KZZD-EW-01-03)
【CateGory Index】: P228.4;P354
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