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Telecommunications and Radio Engineering
SJR: 0.202 SNIP: 0.2 CiteScore™: 0.23

ISSN Imprimir: 0040-2508
ISSN On-line: 1943-6009

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Telecommunications and Radio Engineering

DOI: 10.1615/TelecomRadEng.v74.i16.80
pages 1483-1495

VERTICAL PROFILE OF ATMOSPHERIC CONDUCTIVITY CORRESPONDING TO SCHUMANN RESONANCE PARAMETERS

A. P. Nickolaenko
O.Ya. Usikov Institute for Radio Physics and Electronics, National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkiv 61085, Ukraine
Yu. P. Galuk
St. Petersburg State University, 35 University Ave., St. Petersburg, Peterhoff, 198504 Russia
Masashi Hayakawa
Hayakawa Institute of Seismo Electromagnetics Co. Ltd.(Hi-SEM), The University of Electro-Communications (UEC) Alliance Center #521, Advanced & Wireless and Communications Research Center, UEC, Chofu, Tokyo, 182-8585, Japan

RESUMO

The search for a realistic vertical conductivity profile of atmosphere remains an update task of great importance for the direct electromagnetic simulations of global electromagnetic (Schumann) resonance. Such a profile is necessary when describing the impact on the ionosphere of the space weather, the pre-seismic activity or other various factors. Knowledge of the regular conductivity profile is of particular importance, since it allows computing of the observed regular parameters of Schumann resonance. Starting from the classic data, we developed the new height conductivity profile of atmosphere in the range from 2 to 98 km. The profile allows obtaining the Schumann resonance parameters consistent with experimental observations. The propagation constant of extremely low frequencies (ELF) radio waves was computed corresponding to this profile by using the rigorous full wave solution. We demonstrate a high correspondence of the frequency dependence obtained to the conventional reference model based on the records of global electromagnetic resonance. The conductivity profiles are also suggested for the ambient day and ambient night conditions. We obtained the propagation constants relevant to these profiles using the full wave solution. The power spectra of Schumann resonance were also computed and compared of the vertical electric field component in the case of uniform global distribution of thunderstorms. Spectra relevant to suggested conductivity profiles were compared with the spectrum obtained in the frameworks of the standard reference model. We also show consistency of the model data obtained with the conductivity profiles with the results of measurements of the radio signals radiated by ELF transmitters.


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