ИСТИНА

The combined use of incoherent scatter radars (ISR) and satellite measurements makes possible to compare the total electron content (TEC) obtained by these methods. ISR allow obtaining the values of TEC along the sight of view to a satellite, and, by moving the radar antenna pattern, along the trajectory of the satellite.Here we present the results of comparison of TEC observation data from signals of GLONASS satellites and the EISCAT UHF incoherent scatter radar (Tromsø, Norway) during modification of the high latitude ionosphere by the EISCAT/Heating facility. The observations have been carried out during October 2013 and October 2018. The generation of small-scale artificial ionospheric irregularities in the region which was disturbed by a powerful high frequency electromagnetic wave is confirmed by observations of the GLONASS navigation satellites signals according to which the region of the sharp increase in the electron density corresponds to the area of increasing dispersion of the fluctuation component of phase measurements of the satellite signal. It was shown that when radio signals from GLONASS pass through the heated region of the ionosphere, along with reduction of the angle between the receiver-satellite line and the magnetic zenith, the phase fluctuations increase and reach values of 3-4 times greater than those outside the perturbed region. The observed increase in fluctuations can be explained by the presence of small-scale irregularities in the perturbed and the angle aspect effect with the magnetic zenith.