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  • Универзитет у Новом Саду
  • Факултет техничких наука
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  • Факултет техничких наука
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Modelovanje uticaja intenzivnih promena Sunčevog zračenja na prostiranje radio talasa

Modelling of intense solar radiation change influence on radio propagation

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Disertacija11322.pdf (8.145Mb)
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Author
Bajčetić, Jovan
Mentor
Šenk, Vojin
Committee members
Todorović, Branislav
Narandžić, Milan
Perić, Miroslav
Nina, Aleksandra
Šenk, Vojin
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Abstract
Ova disertacija predstavlja rezultate istraživanja uticaja dve vrste intenzivnih promena Sunčevog zračenja na prostiranje radio talasa. Prvi deo prikazanih rezultata odnosi se na efekte neperiodičnih zračenja u X-opsegu talasnih dužina u toku trajanja Sunčevog X-flera. Izvršeno je modelovanje karakteristika jonizovane sredine D-sloja jonosfere u toku celokupnog trajanja efekata dodatne energije jonizacije i karakteristika prostiranja radio talasa određenih frekvencijskih opsega u okviru navedene sredine. Drugi deo rezultata prikazuje periodičnu promenu nivoa prijemnog signala usmerene mikrotalasne radio komunikacije koja nastaje u toku jutarnjih časova. Pokazano je da ova promena ima visok stepen korelisanosti sa promenama vrednosti geomagnetskog polja i da je uzrokuje pojava Sunca na horizontu. Na osnovu rezultata dobijenih merenjem je predložen model koji opisuje trend navedene promene u jutarnjim časovima.
This thesis presents the research results of intensive solar radiation variation influence on radio propagation. The first part of presented results is related to the effects of non-periodic radiation within X-ray wavelength during Solar X-flare. Modelling of ionosphere D-layer medium is performed during all time duration of additional ionization energy, as well as radio propagation characteristics within this medium. The second part of the measured results presents periodic variation of receiving microwave radio signal level of experimental Line-of-site communication during the morning hours. It is shown that this variation is highly correlated with geomagnetic field component values variation and that is caused by the Sun appearance on the horizon. Based on the experimentally collected results, the model that describes this variation during morning hours is proposed.
Faculty:
Универзитет у Новом Саду, Факултет техничких наука
Date:
09-03-2017
Projects:
  • Astroinformatics: application of IT in astronomy and close fields (RS-44002)
  • Influence of collisions on astrophysical plasma spectra (RS-176002)
Keywords:
Prostiranje radio talasa / Propagation of radio waves / intensive variation of Solar radiation / refraction index / dielectric constant of a medium / radio propagation modelling / intenzivne promene Sunčevog zračenja / indeksrefrakcije / dielektrična konstanta sredine / modelovanje prostiranja radiotalasa
[ Google Scholar ]
Handle
https://hdl.handle.net/21.15107/rcub_nardus_8550
URI
https://nardus.mpn.gov.rs/handle/123456789/8550
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