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National Repository of Grey Literature 1 records found  Search took 0.01 seconds. 
Propagation of very low frequency radio waves in the Earth-ionosphere waveguide
 Guth Jarkovský, Jiří ; Santolík, Ondřej (advisor) ; Píša, David (referee)
Lightning strokes emit strong electromagnetic (EM) radiation, mostly in the very low frequency band (VLF) 3-30 kHz. This radiation propagates in the Earth-ionosphere wa- veguide across distances of thousands of kilometres. Using measurements of several com- ponents of the EM feld, it is possible to determine the direction of arrival of an EM wave. The main result of this thesis is an algorithm for this analysis and its application to data measured by a station located in southern France. The algorithm was used to determine the direction of arrival of signal from several lightning strokes with known locations as well as from emitters used for submarine communication, as those also emit waves in the VLF band and thus are also suitable for application of the algorithm. 1
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