Theoretical simulation of ELF excitation in modulated heating F layers in low and middle latitudes

In order to study the characteristics of extremely low frequency (ELF) radiation source modulated by ionospheric modulation heating F in low and middle latitudes, based on the theory of ionospheric driving current, a numerical model of ELF excited by amplitude modulation heating F layer was established. According to the analysis of this model, under the action of amplitude modulation heating wave, it will cause the electronic pressure gradient to oscillate according to the modulation frequency to form an oscillating diamagnetic ring current, which in turn excites the ELF radiation source. The minimum value and the distribution of double-peak morphology, the dipole moment intensity of the radiation source decreases rapidly with the increase of the modulation frequency.