Peculiarities of excitation of the Earth–ionosphere waveguide at frequencies above the frequency of the first transverse resonance

A. V. Larchenko; Ларченко А. В.; O. M. Lebed; Лебедь О. М.; S. V. Pilgaev; Пильгаев С. В.; D. I. Sidorenko; Сидоренко Д. И.; Yu. V. Fedorenko; Федоренко Ю. В.

doi:10.31857/S036767652270048X

Peculiarities of excitation of the Earth–ionosphere waveguide at frequencies above the frequency of the first transverse resonance

Authors: Larchenko A.V.¹, Lebed O.M.¹, Pilgaev S.V.¹, Sidorenko D.I.¹, Fedorenko Y.V.¹
Affiliations:
1. Polar Geophysical Institute
Issue: Vol 87, No 2 (2023)
Pages: 278-285
Section: Articles
URL: https://rjsvd.com/0367-6765/article/view/654489
DOI: https://doi.org/10.31857/S036767652270048X
EDN: https://elibrary.ru/AIXQDM
ID: 654489

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Abstract

Experimental data on the registration of signals from tweek-atmospherics and an ionospheric source formed because of heating of the ionosphere at frequencies higher than the frequency of the first transverse resonance of the Earth–ionosphere waveguide (~1.8 kHz) are considered. It is shown that, far from the source, at frequencies near the resonance, almost complete circular left-hand polarization of the horizontal magnetic field is observed, and the angles of incidence are small and range from 10° to 35°. A joint analysis of observational data and simulation results showed that it is possible to calculate the effective reflection height from estimates of the incidence angle, which can be used to diagnose the lower ionosphere. But, in the case of an ionospheric source, it is important to take into account the inhomogeneity of its radiation pattern.

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