Characteristics of chaotic pulse trains generated by lightning flashes

Gomes, Chandima; Cooray, Vernon; Fernando, Mahendra; Montaño, Raúl; Sonnadara, D. U. J.

doi:10.1016/j.jastp.2004.07.036

Cited by 33 publications

(40 citation statements)

References 25 publications

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“…Because of their chaotic behavior, especially with regard to their amplitudes, pinpointing the exact beginning and end of each pulse in the CPT with good precision is difficult. The total duration (TD) of the CPT is estimated using the criterion adopted by Gomes et al [6]. According to this criterion, TD is the time duration between the regions of pulse activity at the start and end of the pulse train where the pulse amplitude is equal to 10% of the maximum amplitude in the CPT.…”

Section: Characteristics Of the Chaotic Pulse Train (Cpt)mentioning

confidence: 99%

“…Since the CPTs that Weidman observed occurred during the leader stage of the subsequent return strokes, he coined the name "chaotic subsequent return stroke" to represent subsequent return strokes preceded by chaotic pulse bursts. Subsequent studies demonstrated that CPTs can also occur in the electric fields of cloud flashes without any return strokes [4][5][6]. Gomes et al [6] observed the occurrence of CPTs in ground flashes either just before the subsequent return strokes or without any association with subsequent return strokes.…”

Section: Introductionmentioning

confidence: 99%

“…Subsequent studies demonstrated that CPTs can also occur in the electric fields of cloud flashes without any return strokes [4][5][6]. Gomes et al [6] observed the occurrence of CPTs in ground flashes either just before the subsequent return strokes or without any association with subsequent return strokes. According to Gomes et al [6], the width of the individual pulses of CPTs is within the range of a few microseconds with minimum ranges into the sub microsecond scale.…”

Section: Introductionmentioning

confidence: 99%

“…Gomes et al [6] observed the occurrence of CPTs in ground flashes either just before the subsequent return strokes or without any association with subsequent return strokes. According to Gomes et al [6], the width of the individual pulses of CPTs is within the range of a few microseconds with minimum ranges into the sub microsecond scale. The inter-pulse duration lies within the range of 2-20 µs, and duration of the CPT is 400-500 µs.…”

Section: Introductionmentioning

confidence: 99%

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On the Possible Origin of Chaotic Pulse Trains in Lightning Flashes

et al. 2017

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Abstract:In this study, electromagnetic field radiation bursts known as chaotic pulse trains (CPTs) and regular pulse trains (RPTs) generated by lightning flashes were analyzed. Through a numerical analysis it was found that a typical CPT could be generated by superimposing several RPTs onto each other. It is suggested that the chaotic pulse trains are created by a superposition of several regular pulse trains. Since regular pulse trains are probably created by dart or dart-stepped leaders or K-changes inside the cloud, chaotic pulse trains are caused by the superposition of electric fields caused by more than one of these leaders or K-changes propagating simultaneously. The hypothesis is supported by the fact that one can find regular pulse trains either in the beginning, middle or later stages of chaotic pulse trains.

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Section: Characteristics Of the Chaotic Pulse Train (Cpt)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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On the Possible Origin of Chaotic Pulse Trains in Lightning Flashes

et al. 2017

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“…Hayakawa et al [29] developed a model to simulate very high frequency (VHF)/ultrahigh frequency (UHF) radiation due to lightning preliminary breakdown processes. Gomes and Cooray [30], Gomes et al [31], and Sharma et al [32] examined electric field pulses produced by cloud discharges, "chaotic" pulse trains, and preliminary breakdown pulses produced by positive ground flashes, respectively. Sonnadara et al [33] presented radiation field spectra for cloud flashes in the interval from 20 kHz to 20 MHz.…”

Section: ) Wideband Electric and Magnetic Fields Produced Bymentioning

confidence: 99%

Overview of Recent Progress in Lightning Research and Lightning Protection

Rakov

Rachidi

2009

IEEE Trans. Electromagn. Compat.

196

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Abstract-This review paper, prepared for this second special issue on lightning of the IEEE TRANSACTIONS ON ELECTROMAGNETIC COMPATIBILITY, summarizes major publications on lightning and lightning protection since the first special issue published in November 1998, i.e., during the last decade. The review is organized in the following five sections: lightning discharge-observations, lightning discharge-modeling, lightning occurrence characteristics/lightning locating systems, lightning electromagnetic pulse and lightning-induced effects, and protection against lightning-induced effects.

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Data processing procedure using distribution of slopes of phase differences for broadband VHF interferometer

et al. 2014

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The upgraded VHF digital interferometer (VHF DITF) system is introduced which can continuously sample the radiation associated with lightning. A new processing technique was implemented which uses the distribution of slopes of the phase difference versus frequency to locate the radiation source. By using this technique, frequency components which are not due to lightning can be excluded and low as well as high amplitude sources are located. As a result, both positive breakdown and negative breakdown are located, and negative recoil leaders (recoil leaders) are visualized in great detail. The recoil leaders which continue into the positive charge region are seen to slow their propagation and dim their radiation as they cross the flash initiation region. Analysis of the relative received power of the different breakdown types, negative leaders, recoil leaders, and positive leaders, also can be made. In both the intracloud and cloud-to-ground flash, the modes of the distributions of received power for negative leaders, recoil leaders, and positive leaders were approximately the same. The brightest emissions seen from the positive leader were substantially lower than the brightest emission seen from the negative leader. The results also indicate that positive leaders as well as lower elevation negative leader emit more low frequency radiation than recoil leaders and high-elevation negative leaders. By continuously sampling the VHF waveform, the upgraded VHF DITF locates many weak sources which the previous system was not capable of locating.

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Characteristics of chaotic pulse trains generated by lightning flashes

Cited by 33 publications

References 25 publications

On the Possible Origin of Chaotic Pulse Trains in Lightning Flashes

On the Possible Origin of Chaotic Pulse Trains in Lightning Flashes

Overview of Recent Progress in Lightning Research and Lightning Protection

Data processing procedure using distribution of slopes of phase differences for broadband VHF interferometer

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