Aim. The widespread use of global navigation satellite systems (GNSS) has led to the development of new methods designed to determine and accumulate the index of ionosphere ionization (VTEC). Using these data it is possible to significantly improve the accuracy and reliability of determining the coordinates of the observation point. Therefore, the task of constructing a model of ionization index is relevant. Method.
Purpose. It is necessary to examine the azimuth-temporal variations of the ionosphere during active disturbance, according to observations SULP-station and to analyze the data. The technique. As input data we selected ionofiles with regular GNSS observations of the reference station SULP-on date 1, 2, 3 September and 1, 2, 3 October 2013 at 0, 6, 12, 18 and 23 h The next step was to our choice of satellite data. This information formed in the daily Files Software Trimble Planning. The frequency of such registered user specifies the personal file.