Sensing the Earth's low ionosphere during solar flares using VLF signals and GOES X-ray data
arXiv:1405.4128 · doi:10.1016/j.asr.2014.02.022
Abstract
An analysis of D-region electron density height profile variations, induced by four isolated solar X-ray flares during period from September 2005 to December 2006, based on the amplitude and the phase delay perturbation of 22.1 kHz signal trace from Skelton (54.72 N, 2.88 W) to Belgrade (44.85 N, 20.38 E), coded GQD, was carried out. Solar flare data were taken from NOAA GOES12 satellite one-minute listings. For VLF data acquisition and recordings at the Institute of Physics, Belgrade, Serbia, the AbsPAL system was used. Starting from LWPCv21 code (Ferguson, 1998), the variations of the Earth-ionosphere waveguide characteristic parameters, sharpness and reflection height, were estimated during the flare conditions. It was found that solar flare events affected the VLF wave propagation in the Earth-ionosphere waveguide by changing the lower ionosphere electron density height profile, in a different way, for different solar flare events.
arXiv comment23 pages, 9 figures, 3 tables
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Cited by in corpus (3)
- A study of VLF signals variations associated with the changes of ionization level in the D-region in consequence of solar conditions
- Diagnostics of plasma in the ionospheric D-region: detection and study of different ionospheric disturbance types
- Numerical analysis of electron density and response time delay during solar flares in mid-latitudinal lower ionosphere