Barabash V. Aperiodic and wave disturbances in the ionosphere: the results of vertical sounding

This dissertation is dedicated to the study of wave variations in the electron density in the F-region of the ionosphere in main geophysical periods, as well as aperiodic and quasiperiodic disturbances in the ionosphere caused by solar eclipses, flight and the explosion of the Chelyabinsk meteoroid, by the influence of powerful radio transmission, spaced by thousands kilometers from a powerful radio system. In order to observe the state of the ionosphere the radiophysical method of vertical sounding of the ionosphere in the dissertation was used. For the analysis of the results of observations, methods of mathematical statistics and statistical radio physics were used, as well as system spectral analysis, based on the windowing Fourier transform, adaptive Fourier transform, and also wavelet transform. Was research of the reaction of the electron concentration of the F-region of the ionosphere to the solar eclipse on January 4, 2011 and March 20, 2015, over Kharkiv, and over Europe. Research of the reaction of the electron density F-region of the ionosphere at the fall of the Chelyabinsk meteoroid February 15, 2013. Research of the ionosphere reaction at the powerful radio transmission of the radio engineering system spaced from the observation site at a distance of about 1000 km. Research of diurnal and seasonal variations of the electron density at the ionospheric F2-peak during periods of growth and decline of solar activity. The main parameters of disturbances caused by solar eclipses, the falling of the Chelyabinsk meteoroid and powerful radio transmission are determined.