Statistical Analysis of Ionospheric Storms on GPS TEC measurements between 2000 and 2014 in mid-latitude

Abstract:

The ionospheric storms that may generate the spatial/temporal gradient or irregularities of electron densities are very interest phenomena for two reasons. First, they occur by the increasing solar EUV/X-ray fluxes as well as by the equatorward or poleward plasma transportations by the global changes of the neutral winds and electric fields responded to geomagnetic storms. Second, they have been the practical interests in the satellite navigations and radio communications, especially in the mid-latitudes of the dense population regions in these days though ionosphere in mid-latitudes is quiet compared with high and low latitudes. In this presentation, the statistical analysis of the occurrences of the ionospheric storms in Korea are presented. They are examined from Korea GPS TEC dataset between 2000 and 2014 over the full-solar cycle coverage. We examine the two super geomagnetic storms cases of 29-31 October 2003 and 8-10 November 2004 to discuss the possible physical mechanisms for ionospheric storm of positive and negative phases and their affection on GPS positioning. The parameters to define the ionospheric storms are suggested to increase our understanding of their physical characteristic and then to apply the practical cases.