Volume 38 Issue 6
Nov.  2018
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Article Navigation >  Chinese Journal of Space Science  > 2018  >  38(6): 847-854
LI Yongtao, LI Jianwen, DAI Taogao, PANG Peng. Influence of Solar Activity on Ionospheric TEC Change[J]. Chinese Journal of Space Science, 2018, 38(6): 847-854. doi: 10.11728/cjss2018.06.847
Citation: LI Yongtao, LI Jianwen, DAI Taogao, PANG Peng. Influence of Solar Activity on Ionospheric TEC Change[J]. Chinese Journal of Space Science, 2018, 38(6): 847-854. doi: 10.11728/cjss2018.06.847
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Influence of Solar Activity on Ionospheric TEC Change

doi: 10.11728/cjss2018.06.847 cstr: 32142.14.cjss2018.06.847

  • 1. Institute of Geography Spatial Information, Information Engineering University, Zhengzhou 450001;

  • 2. Xi'an Division of Surveying and Mapping, Xi'an 710054;

  • 3. Troops 63883, Luoyang 471000

  • Received Date: 2018-01-14
  • Rev Recd Date: 2018-06-15
  • Publish Date: 2018-11-15
    Abstract
  • In order to study the effect of solar activity on ionospheric TEC variation, the correlation between solar sunspot number, daily average solar flux F10.7 index and ionospheric TEC from 2000 to 2016 and the correlation between solar activity and ionospheric TEC changes 15 days before and after the X9.3 extra large flare on September 6, 2017 are analyzed. The results are as follows. In terms of the data of 17 years from 2000 to 2016, there is a strong overall correlation between solar sunspot number, solar F10.7 index and TEC with a big local difference. That is, local correlation is uneven. There is a strong positive correlation between solar sunspot number, solar F10.7 index and TEC before and after this flare burst. The effect of solar activity on TEC is delayed about 2 days. The influence of solar activity on global ionospheric TEC is not synchronized. There is about 1 day delay from high latitude to low latitude, and its influence on low latitudes is far greater than that of middle and high latitudes. In general, solar activity is the main reason for the change of ionospheric TEC, but other important factors may exist locally.

     

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