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Vhf emissions prior to the onset of initial electric field changes of intracloud flashes

Sabri, M. H. M. and Ahmad, M. R. and Periannan, D. and Seah, B. Y. and Aziz, M. Z. A. A. and Ismail, M. M. and Esa, M. R. M. and Mohammad, S. A. and Abdul Malek, Z. and Yusop, N. and Lu, G. (2019) Vhf emissions prior to the onset of initial electric field changes of intracloud flashes. In: 2018 International Conference on Electrical Engineering and Computer Science, ICECOS 2018, 2-4 Oct 2018, Pangkal Pinang, Indonesia.


Official URL: http://www.dx.doi.org/10.1109/ICECOS.2018.8605235


We present the observation of VHF impulses electric (E) field emissions found in two normal intracloud (IC) flashes accompanied by initial electric field changes (IECs) in a tropical thunderstorm. The data was collected on November 23 ^ rd, 2017 (within reversal distance) to our lightning sensor in Malacca, Malaysia. The durations from the onset of IECs to the first initial breakdown (IB) pulse are range between 0.68 and 0.69 ms and the magnitudes of IECs are range between 0.18 and 0.50 V/m. Besides that, before the onset of IECs there is small pulses was detected for IC flash (Nov67) same with the VHF impulse for both IC flash. It was detected earlier before the onset of IEC by 12.69 and 251.60 μs for the VHF impulse.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:lightning initiation, tropical thunderstorm, very high frequency
Subjects:T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions:Electrical Engineering
ID Code:88828
Deposited By: Narimah Nawil
Deposited On:29 Dec 2020 12:26
Last Modified:29 Dec 2020 12:26

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