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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 22, issue 6
Ann. Geophys., 22, 2047–2052, 2004
https://doi.org/10.5194/angeo-22-2047-2004
© Author(s) 2004. This work is distributed under
the Creative Commons Attribution 3.0 License.
Ann. Geophys., 22, 2047–2052, 2004
https://doi.org/10.5194/angeo-22-2047-2004
© Author(s) 2004. This work is distributed under
the Creative Commons Attribution 3.0 License.

  14 Jun 2004

14 Jun 2004

Enhancement in electron and ion temperatures due to solar flares as measured by SROSS-C2 satellite

D. K. Sharma1,2, J. Rai1, M. Israil2, P. Subrahmanyam3, P. Chopra3, and S. C. Garg3 D. K. Sharma et al.
  • 1Department of Physics, Indian Institute of Technology, Roorkee 247 667, India
  • 2Department of Earth Sciences, Indian Institute of Technology, Roorkee 247 667, India
  • 3Radio & Atmospheric Science Division, National Physical Laboratory, New Delhi, India

Abstract. The observations on the ionospheric electron and ion temperatures (Te and Ti) measured by the RPA payload aboard the SROSS-C2 satellite have been used to study the effect of solar flares on ionospheric heating. The data on solar flare has been obtained from the National Geophysical Data Center (NGDC) Boulder, Colorado (USA). It has been found that the electron and ion temperatures have a consistent enhancement during the solar flares on the dayside Earth's ionosphere. The estimated enhancement for the average electron temperature is from 1.3 to 1.9 times whereas for ion temperature it is from 1.2 to 1.4 times to the normal days average temperature. The enhancement of ionospheric temperatures due to solar flares is correlated with the diurnal variation of normal days' ionospheric temperatures. The solar flare does not have any significant effect on the nightside ionosphere. A comparison with the temperature obtained from the IRI-95 model also shows a similar enhancement.

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