About Horizontal Inhomogeneities of Electron Concentration Influence on the Propagation of ULF Signals in the Earth-Ionosphere Waveguide

The influence of horizontal electron density inhomogeneities in the D region of the high latitude ionosphere on a 1500 Hz signal propagation in the Earth-ionosphere waveguide is studied in this paper. The presented results were obtained by the numerical simulation method of radio wave propagation taking into account the Earth's magnetic field and anisotropy of the ionospheric conductivity. Realistic electron density obtained by the Polar Geophysical Institute partial reflection radar data, located on the “Tumanny” radio-physical observatory in the Murmansk region (69.0 N, 35.7 E).