Time-Frequency Analysis of Narrow Bipolar Pulses observed in Sri Lanka

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Fältnamn	Indikatorer	Metadata
000		03181naa a2200397 4500
001		oai:DiVA.org:uu-316340
003		SwePub
008		170425s2016 \| \|\|\|\|\|\|\|\|\|\|\|000 \|\|eng\|
024	7	a https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-3163402 URI
024	7	a https://doi.org/10.1109/ICLP.2016.77914012 DOI
040		a (SwePub)uu
041		a engb eng
042		9 SwePub
072	7	a ref2 swepub-contenttype
072	7	a kon2 swepub-publicationtype
100	1	a Gunasekara, T. A. L. N.u Univ Colombo, Dept Phys, Colombo, Sri Lanka.4 aut
245	1 0	a Time-Frequency Analysis of Narrow Bipolar Pulses observed in Sri Lanka
264	1	c 2016
338		a print2 rdacarrier
520		a Narrow Bipolar Pulses (NBP) of a single thunderstorm from a coastal location in Sri Lanka were subjected to S-transformation in order to study their time frequency information. This study is an extension to a similar study carried out by the authors where properties of NBPs were analyzed using the wavelet transformation. Keeping in line with the previous study, 18 events pertaining to equal number of positive and negative NBPs with the narrowest temporal widths were studied. The data was obtained from the southern coastal area of Sri Lanka (Matara - 5.95 degrees N, 8.53 degrees E) from a highly active thunderstorm, which occurred during the month of May in 2013. The waveforms were recorded with a 10 ns resolution within a 100 ms time window. The spanning (width) and the ratio of peak power amongst the initial and overshoot pulses were measured and compared for each polarity. The negative NBPs had an average spanning of 134 - 371 kHz. The overshoot of the same had an average range of 127 - 255 kHz. The positive NBPs had an average spanning of 103 - 245 kHz. The overshoot of the same had an average range of 102 - 195 kHz. The ratio of peak power of NBPs to overshoot had an average of 1.08 for both positive and negative pulses. The spectrogram reveals the initial and overshoots pulses to be relatively equal in power intensities.
650	7	a TEKNIK OCH TEKNOLOGIERx Elektroteknik och elektronik0 (SwePub)2022 hsv//swe
650	7	a ENGINEERING AND TECHNOLOGYx Electrical Engineering, Electronic Engineering, Information Engineering0 (SwePub)2022 hsv//eng
653		a Lightning
653		a Narrow Bipolar Pulses
653		a Spread Distribution
653		a Peak Power Ratio
653		a S Transformation
700	1	a Vayanganie, S. P. A.u Univ Colombo, Dept Phys, Colombo, Sri Lanka.4 aut
700	1	a Jayalal, S. N.u Univ Colombo, Dept Phys, Colombo, Sri Lanka.4 aut
700	1	a Fernando, M.u Univ Colombo, Dept Phys, Colombo, Sri Lanka.4 aut
700	1	a Sonnadara, D. U. J.u Univ Colombo, Dept Phys, Colombo, Sri Lanka.4 aut
700	1	a Cooray, Vernon,d 1952-u Uppsala universitet,Elektricitetslära4 aut0 (Swepub:uu)verncoor
710	2	a Univ Colombo, Dept Phys, Colombo, Sri Lanka.b Elektricitetslära4 org
773	0	t 2016 33RD INTERNATIONAL CONFERENCE ON LIGHTNING PROTECTION (ICLP)z 9781509058433
856	4 8	u https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-316340
856	4 8	u https://doi.org/10.1109/ICLP.2016.7791401

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Av författaren/redakt...: Gunasekara, T. A ...; Vayanganie, S. P ...; Jayalal, S. N.; Fernando, M.; Sonnadara, D. U. ...; Cooray, Vernon, ...

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Av lärosätet: Uppsala universitet

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