THERMAL SCIENCE

International Scientific Journal

Jovan Bajčetić

,

Aleksandra Nina

,

Vladimir M. Čadež

,

Branislav M. Todorović

IONOSPHERIC D-REGION TEMPERATURE RELAXATION AND ITS INFLUENCES ON RADIO SIGNAL PROPAGATION AFTER SOLAR X-FLARES OCCURRENCE

ABSTRACT
In this paper our attention is focused on relations between radio signal propagation characteristics and temperature changes in D-region after solar X-flare occurrence. We present temperature dependencies of electron plasma frequency, the parameter that describes medium conditions for propagation of an electromagnetic wave, and the refractive index which describes how this wave propagates. As an example for quantitative calculations based on obtained theoretical equations we choose the reaction of the D-region to the solar X-flare occurred on May 5th, 2010. The ionospheric modelling is based on the experimental data obtained by low ionosphere observations using very low frequency radio signal. [Projekat Ministarstva nauke Republike Srbije, br. III-44002, 176002, 176004 i br. TR-32030]
KEYWORDS
electron temperature, ionospheric D-region, radio signals propagations, solar X-flares
PAPER SUBMITTED: 2014-12-23
PAPER REVISED: 2015-03-11
PAPER ACCEPTED: 2015-03-31
PUBLISHED ONLINE: 2015-06-07
DOI REFERENCE: https://doi.org/10.2298/TSCI141223084B
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2015, VOLUME 19, ISSUE Supplement 2, PAGES [S299 - S303]
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Ionospheric D-region temperature relaxation and its influences on radio signal propagation after solar X-flares occurrence

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