Equatorial Electrojet as a Nonlinear ULF Antenna for the Short-Wave Heating Facility
In this paper, we discuss some question related to the nature and manifestation of the equatorial electrojet. We study the equatorial electrojet as nonlinear antenna for generating ultra-low-frequency electromagnetic signals during periodic heating of the ionosphere by the short-wave heating-facility radiation. It is shown that for modulation at the frequency corresponding to the ULF band the generation of electromagnetic signals can be the considerable intensified. This effect is especially important for day-time magnetosphere where in same frequency band there are eigen-frequencies of plasma magnetospheric maser in the electron radiation belts. This can lead to modification of VLF emissions in the subauroral magnetosphere.