ISSN 2070-7401 (Print), ISSN 2411-0280 (Online)
Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa


Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2012, Vol. 9, No. 4, pp. 57-62

Variations of very low frequency signal parameters of radio navigation stations, registrated in Yakutsk

R.R. Karimov 1, V.I. Kozlov 1, A.A. Korsakov 1, V.A. Mullayarov 1, V.P. Melchinov 2
1 Yu.G. Shafer Institute of Cosmophysical Research and Aeronomy SB RAS, 677980, Yakutsk, Lenina, 31
2 Physical-technical Institute, M.K. Ammosov The North-Eastern Federal University, 677000, Yakutsk, Belinskogo, 58
The technique of separation of amplitude and phase of radio navigation system signals RSDN - 20 are presented, in
which the city of Yakutsk in the continuous process of registering. Stable daily and seasonal course of the amplitude
and phase are received. Seasonal variations in the amplitude of the daytime conditions are most pronounced, which
is associated with an increase in the efficiency of ionization of the D layer ionosphere from December to June. In the
seasonal diurnal variations of amplitude and phase of the observed asymmetry is manifested in the fact that the average
values of these parameters during the autumnal equinox to close at the same time the summer solstice and the spring
equinox, the parameter is closer to the period of the winter solstice. Comparing the average daily variation of the amplitude
of VLF radio signals and the noise measured variation of the intensity of the source of thunderstorm activity in
Siberia in the summer. The above variation of the maximum (July, 03:00-12:00 UT) is 3.2.
Keywords: ionosphere, D and E layers, thunderstorm, radio noise, radio wave propagation
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