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Vol. 19 (2016 year), No. 1, DOI: 10.21443/1560-9278-2016-1/2
Larchenko A. V., Pilgaev S. V., Fedorenko Yu. V.
Results of ground-based observations of the field structure in the range of very low frequencies with a strong modification of the ionosphere by a modulated short-wave radiation
The results of ground-based observations of ELF/VLF emissions during heating experiments have been described. It has been shown that the polarization of the horizontal magnetic field is determined by the propagation conditions in the Earth – ionosphere waveguide. The polarization is linear at 1 017 Hz, predominantly linear at 3 017 Hz, and left-handed elliptical at 2 017 Hz. At the frequency of 1 017 Hz waves propagate in the TEM mode only, but at the frequency of 3 017 Hz waves propagate in three modes: TEM, TM01, TE01. A phase velocity at the frequency of 1 017 Hz has been estimated by the measured phase differences of wavefields recorded in spatially separated points
(in Russian, стр.0, fig. 0, tables. 0, ref 0, Adobe PDF, Adobe PDF 0 Kb)
Vol. 19 (2016 year), No. 1, DOI: 10.21443/1560-9278-2016-1/2
Lebed O. M., Fedorenko Yu. V., Larchenko A. V.
Influence of the solar flares in March 2012
on the conductivity profile of the high-latitude lower ionosphere
The ionospheric D-layer affects the electromagnetic waves propagated in the Earth – ionosphere waveguide. It is known that the propagation velocity of atmospherics – electromagnetic pulses from lightning discharge depends on the conductivity profile of the lower ionosphere. In this paper the authors have considered the influence of solar flares in March 2012 on the propagation velocity of atmospherics and thus the state of the high-latitude lower ionosphere. The possibility to estimate the conductivity profiles of the daytime ionosphere under disturbed and undisturbed geomagnetic conditions using the measurements of the propagation velocity of atmospherics along the high-latitude path has been demonstrated
(in Russian, стр.0, fig. 0, tables. 0, ref 0, Adobe PDF, Adobe PDF 0 Kb)