Solar-Terrestrial Physics Solar-Terrestrial Physics Solar-Terrestrial Physics 2500-0535 23008 10.12737/stp-43201806 Results of current research Results of current research Results of current research Research into connection between spectral resonance structures and harmonics of ionospheric Alfvén resonator Research into connection between spectral resonance structures and harmonics of ionospheric Alfvén resonator Прикнер К. Prikner K. Фейгин Феликс Зеликович Feygin Felix Zelikovich feygin@ifz.ru

доктор физико-математических наук;

doctor of physical and mathematical sciences;

 Хабазин Юрий Григорьевич Khabazin Yuriy Grigoryevich khabazin@ifz.ru Геофизический институт АН ЧР Прага Чехия Institute of Geophysics CAS Prague Czech Republic Институт физики Земли им. О.Ю. Шмидта РАН Москва Россия Schmidt Institute of Physics of the Earth, RAS Moscow Russian Federation Институт физики Земли им. О.Ю. Шмидта РАН Москва Россия O.Yu. Shmidt Institute of Physics of Earth RAS Moscow Russian Federation 4 3 43 45 https://zh-szf.ru/en/nauka/article/23008/view

We present the results of modeling of the ionospheric Alfvén resonator (IAR) and compare the results of electromagnetic waves passing through IAR to Earth's surface with the dynamic spectrum of simultaneous observations of spectral resonance structures (SRS). IAR is simulated using ionospheric parameters obtained from measurements made with the CP-1 program of the Scandinavian EISCAT radar. The IAR model is employed to calculate coefficients of reflection RC(f) and transmission TC(f) of electromagnetic waves in the frequency range 0–5 Hz. The observed dynamic SRS spectrograms consist of spectral lines, in which frequencies, time variations of frequencies, and distances between adjacent resonant lines are confidently determined. The calculated frequencies of maxima of the signal transmission coefficient TC to Earth's surface correspond to the observed frequencies of the dynamic spectrum of SRS.

We present the results of modeling of the ionospheric Alfvén resonator (IAR) and compare the results of electromagnetic waves passing through IAR to Earth's surface with the dynamic spectrum of simultaneous observations of spectral resonance structures (SRS). IAR is simulated using ionospheric parameters obtained from measurements made with the CP-1 program of the Scandinavian EISCAT radar. The IAR model is employed to calculate coefficients of reflection RC(f) and transmission TC(f) of electromagnetic waves in the frequency range 0–5 Hz. The observed dynamic SRS spectrograms consist of spectral lines, in which frequencies, time variations of frequencies, and distances between adjacent resonant lines are confidently determined. The calculated frequencies of maxima of the signal transmission coefficient TC to Earth's surface correspond to the observed frequencies of the dynamic spectrum of SRS.

 ionospheric Alfvén resonator reflection and transmission coefficients dynamic spectra spectral resonance structures ionospheric Alfvén resonator reflection and transmission coefficients dynamic spectra spectral resonance structures

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