Properties of Electromagnetic Signals Generated During the Development of Natural Lightning Discharges

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F21%3A10440091" target="_blank" >RIV/00216208:11320/21:10440091 - isvavai.cz</a>
Result on the web
<a href="https://www.mff.cuni.cz/veda/konference/wds/proc/pdf21/WDS21_08_f2_Kolinska.pdf" target="_blank" >https://www.mff.cuni.cz/veda/konference/wds/proc/pdf21/WDS21_08_f2_Kolinska.pdf</a>
DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Properties of Electromagnetic Signals Generated During the Development of Natural Lightning Discharges
Original language description
Analysis of electromagnetic signals emitted by natural lightning discharges is a way to investigate all evolution stages of lightning flashes. We present a study of the initiation stage for selected cloud-to-ground lightning flashes from the data collected in the Mediterranean during autumn 2015. We compared measurements of the broadband receiver BLESKA to the sources of narrowband very high frequency (VHF) radiation detected by the Lightning Mapping Array SAETTA. We verified the findings of Kolmašová et al. (2018) on a larger dataset: strong VHF signals detected by individual lightning mapping array (LMA) stations during the first 1-3 ms of the flash duration corresponded in time to the intense peaks of preliminary breakdown pulses. Such correlation indicates a fast step-like extension of lightning channels that leads to the emission of electromagnetic radiation in a wide range of frequencies. Using the 3D located VHF sources, we roughly estimated the altitude of lightning initiation and discussed it with respect to the locations of the charge regions in the thundercloud. We thus demonstrated the importance of using a combination of data from different measurements for 3D mapping of the development of the lightning channel inside the thundercloud.
Czech name
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Czech description
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Project
<a href="/en/project/GA20-09671S" target="_blank" >GA20-09671S: Investigation of lightning discharges at different scales</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
WDS'21 Proceedings of Contributed Papers — Physics
ISBN
978-80-7378-455-3
ISSN
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e-ISSN
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Number of pages
9
Pages from-to
58-66
Publisher name
Matfyzpress
Place of publication
Praha
Event location
Praha/ZOOM
Event date
Jun 15, 2021
Type of event by nationality
EUR - Evropská akce
UT code for WoS article
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