Calculation of the Maximum Usable Frequency and Field Strength of Propagation Mode 2F2 Taking into Account the Ionosphere Inhomogeneities

This paper presents the method of calculating the maximum usable frequency (MUF) and field strength of radio waves reflecting 2 times at the F2 ionosphere layer under inhomogeneous conditions of the ionosphere. The comparison between predicted and measured MUF has shown that the proposed method significantly increases the accuracy of calculation MUF. The results of calculating frequency dependence of the radio field strength have shown that the scattering of radio waves in the ionosphere leads to the possibility of receiving radio waves at frequencies exceeding the maximum usable frequencies. © 2019 IEEE.