Volume 33 Issue 3
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Liu Guoqi, Gong Jiancun, Huang Wengeng, Shen Hua. Analysis of variation characteristic of VTEC in the low latitude region during low solar activity[J]. Chinese Journal of Space Science, 2013, 33(3): 270-276. doi: 10.11728/cjss2013.03.270
Citation: Liu Guoqi, Gong Jiancun, Huang Wengeng, Shen Hua. Analysis of variation characteristic of VTEC in the low latitude region during low solar activity[J]. Chinese Journal of Space Science, 2013, 33(3): 270-276. doi: 10.11728/cjss2013.03.270
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Analysis of variation characteristic of VTEC in the low latitude region during low solar activity

doi: 10.11728/cjss2013.03.270 cstr: 32142.14.cjss2013.03.270

  • Center for Space Science and Applied Research, Chinese Academy of Sciences, Beijing 100190

  • Received Date: 2012-03-16
  • Rev Recd Date: 2012-11-08
  • Publish Date: 2013-05-15
    Abstract
  • Observational data obtained by an ionospheric scintillation and TEC monitor at Fuzhou (26.1°N, 119.3°E, geomagnetic latitude 14.4°N) during 2006-2010 is used to analyze the characteristic of temporal variation of vertical TEC in this region. The results show that the maximum value occurs at 06:00UT during spring, autumn and winter while at 08:00UT during summer, and the averaged minimum occurs at 21:00UT for all seasons. A seasonal anomaly of VTEC is found with the high value occurring during spring and autumn seasons while low value during summer and winter seasons; there is a weak winter anomaly of VTEC. The value in summer are relatively lower than that in winter and the occurrence time of maximum is delayed. VTEC reveals a decreasing tendency from 2006 to 2009 and increases during 2010, which is corresponding with the yearly variation of solar and geomagnetic activity. The correlation analysis exhibits that the variation of VTEC has a good relation with solar activities with a value of over 0.5, while it shows a weak relationship with the geomagnetic activity. Correlation between F10.7 and VTEC decreases with the raise of total value of geomagnetic index Kp Σkp.

     

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