Results of radiophysical studies of the wave processes in the ionospheric plasma during its heating by high-power radio emission of the Sura facility

We present the results of observations of the wave disturbances in the ionospheric F region over the city of Kharkov, which accompanied the impact on the ionosphere by high-power radio emission of the Sura heating facility located about 960 km from the observation site. Enhancement of the wave activity in the heater operation intervals is detected. A 1.5–4-fold increase in the relative amplitude of the wave disturbance with a period of about 30 min close to the Sura operation mode at altitudes 160–235 km is revealed. The parameters of this disturbance are evaluated. It is shown that this effect can be due to the propagation of internal gravity waves in the atmospheric waveguide having about 200 km in height and 80–100 km in width. The efficiency of comprehensive analysis of the experimental data which we used to reveal and estimate the parameters of the wave disturbances with a small (a few percent) relative amplitude is demonstrated.