<p>Ova disertacija predstavlja rezultate istraživanja uticaja dve vrste<br />intenzivnih promena Sunčevog zračenja na prostiranje radio talasa. Prvi deo<br />prikazanih rezultata odnosi se na efekte neperiodičnih zračenja u X-opsegu<br />talasnih dužina u toku trajanja Sunčevog X-flera. Izvršeno je modelovanje<br />karakteristika jonizovane sredine D-sloja jonosfere u toku celokupnog<br />trajanja efekata dodatne energije jonizacije i karakteristika prostiranja<br />radio talasa određenih frekvencijskih opsega u okviru navedene sredine.<br />Drugi deo rezultata prikazuje periodičnu promenu nivoa prijemnog signala<br />usmerene mikrotalasne radio komunikacije koja nastaje u toku jutarnjih<br />časova. Pokazano je da ova promena ima visok stepen korelisanosti sa<br />promenama vrednosti geomagnetskog polja i da je uzrokuje pojava Sunca na<br />horizontu. Na osnovu rezultata dobijenih merenjem je predložen model koji<br />opisuje trend navedene promene u jutarnjim časovima.</p> / <p>This thesis presents the research results of intensive solar radiation variation<br />influence on radio propagation. The first part of presented results is related to the<br />effects of non-periodic radiation within X-ray wavelength during Solar X-flare.<br />Modelling of ionosphere D-layer medium is performed during all time duration of<br />additional ionization energy, as well as radio propagation characteristics within this<br />medium. The second part of the measured results presents periodic variation of<br />receiving microwave radio signal level of experimental Line-of-site communication<br />during the morning hours. It is shown that this variation is highly correlated with<br />geomagnetic field component values variation and that is caused by the Sun<br />appearance on the horizon. Based on the experimentally collected results, the model<br />that describes this variation during morning hours is proposed.</p>
| Identifer | oai:union.ndltd.org:uns.ac.rs/oai:CRISUNS:(BISIS)102468 |
| Date | 09 March 2017 |
| Creators | Bajčetić Jovan |
| Contributors | Šenk Vojin, Todorović Branislav, Narandžić Milan, Perić Miroslav, Nina Aleksandra |
| Publisher | Univerzitet u Novom Sadu, Fakultet tehničkih nauka u Novom Sadu, University of Novi Sad, Faculty of Technical Sciences at Novi Sad |
| Source Sets | University of Novi Sad |
| Language | Serbian |
| Detected Language | Unknown |
| Type | PhD thesis |
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