DIFFERENCES IN THE SOLAR X-RAY FLARE INDUCED TECD INCREASE WITH REGARDS TO GEOGRAPHICAL LOCATION

In this paper we analyze the influence of the geographical position on the increase of the total electron content in the ionospheric D-region during solar X-ray flares. We modeled the total electron content using data related to signals whose propagation paths lie in the mid and both mid and low latitude ionosphere. The obtained results indicate a larger increase of the total electron content in the perturbed equatorial D-region where the solar radiation is more pronounced and causes a larger electron density gradient with altitude.