Other
Scientific paper
May 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006pobeo..80..191s&link_type=abstract
Publications of the Astronomical Observatory of Belgrade, Vol. 80, p. 191-195
Other
Space Weather, Solar Eclipse, Solar Flare, Vlf Radio Waves
Scientific paper
VLF (Very-Low-Frequency, 3-30 kHz) radio waves emitted from four single frequency transmitters located in Australia, USA, UK and Italy, have been permanently monitored in Belgrade by an AbsPAL receiver since August 2003. The collected data comprise a digitalized VLF wave amplitude and phase both recorded at 0.1 s time intervals for each of the four transmitters. Peculiarities, showing up in profiles of their time dependence curves, reveal effects of phenomena such as solar flares and magnetospheric electron precipitations among others. These features of solar activity may significantly influence the electron density distribution in the ionospheric D-region and consequently the characteristics of received radio signals. This work gives some insight into solar activity and space weather in general in their signatures in VLF signal recordings as well. Two examples show how sudden changes in the ionizing solar X-ray intensity in the ionosphere caused by a flare and solar eclipse, effect VLF signals recorded by the Belgrade receiver.
Cadez Vladimir
Grubor D.
Sulic D.
Zigman V.
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