On the distortions of the modulated radiowaves in the ionosphere

Ionospheric self-modulation at oblique angles of incidence of frequencies varying between 30 to 5000 Hz broadcast at 150 and 50 kW at 60% modulation is discussed. The dependence of the ionospheric distortion on emitting power is demonstrated. The amplitudes of the first, second, and third harmonics are demonstrated to vary as a function of the broadcast power, leading to the determination that the phenomenon is nonlinear. The modulation percentages of each harmonic were calculated using the Vilienskij equations. It was determined that the percentages of the second and third harmonics are too low in relation to those of the first harmonic and to the emitted percentage of the transmitter.