NDLI: Localization of thunder source and reconstruction of lightning channel geometry using sound data

Content Provider	IEEE Xplore Digital Library
Author	Bodhika, J.A.P. Dharmarathne, W.G.D. Fernando, M. Cooray, V.
Copyright Year	2011
Description	Author affiliation: Department of Physics, University of Ruhuna, Sri Lanka (Bodhika, J.A.P.; Dharmarathne, W.G.D.) \|\| Department of Physics, University of Colombo, Sri Lanka (Fernando, M.) \|\| Division of Electricity and Lightning Research, Angstrom Laboratory, University of Uppsala, Sweden (Cooray, V.)
Abstract	Thunder waves generated by lightning ground and cloud flashes are considered to be one of strong natural sound source. Even though the strongest thunder signatures are generated at the return stroke stage, thunder signals generated at other events also can be strong enough to record using a sensitive system. In this study, it was attempted to construct the channel geometry of cloud and ground flashes by locating the temporal and spatial variation of thunder sources. The system was consisted of 3 Bruel & Kjaer type 4198 prepolarized, free field 1/2' microphones placed at difference locations. A mathematical model using the time of arrival method was developed to calculate the location of thunder sources. Five lightning flashes were reconstructed using the recorded thunder signatures. Possible effects that can cause by atmospheric conditions were neglected. However, numerical calculations suggest that the possible error on the location due to miscalculations of time is less than 2%. Accuracy of the calculations can be improved by increasing the number of microphones. Therefore, we suggests that the thunder signal generated by lightning ground and cloud flashes could be used to study the channel geometry of lightning.
Starting Page	429
Ending Page	435
File Size	380398
Page Count	7
File Format	PDF
ISBN	9781457714672
e-ISBN	9781457714665
DOI	10.1109/APL.2011.6110160
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-11-01
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Geometry Accuracy Image color analysis Lightning Numerical models Mathematical model Microphones
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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