Time Domain Modelling of First Return Stroke of Lightning
نویسندگان
چکیده
منابع مشابه
Time Domain Modelling of First Return Stroke of Lightning
The four most important factors that govern the return stroke evolution can be identified as: (i) electric field due to charge distributed along the channel, (ii) transient enhancement of conductance by several orders at the bridging regime (iii) the non-linear increase in channel conductance at the propagating current front and (iv) the associated dynamic electromagnetic field which support th...
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A lightning return-stroke model, based on the lightning return-stroke current derivative measured at the Toronto CN Tower is presented in this paper. A 3-section transmission line representation of the CN Tower along with the derivative of the modified Heidler function is used to simulate the measured current derivative signal. Reflections from major structural discontinuities of the CN Tower a...
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The available experimental data on return stroke speed for both negative and positive lightning are reviewed. The often assumed relationship between the return-stroke speed and peak current is shown to be generally not supported by experimental data. Reasons for the return-stroke speed being lower than the speed of light are discussed. Index Terms Lightning return stroke, propagation speed, pea...
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Using a slit-less spectrograph the spectra in the range of 390-660nm for first return strokes of CG lightning flashes have been obtained both in Qinghai plateau, northwestern China and in coastal area of Guangdong, southern China respectively. The heights of two observation sites differ by 2500 meters. Appling the atomic structure theory to the research work on lightning spectra, parameters suc...
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[1] Lightning return-stroke models are needed for specifying the source in studying the production of transient optical emission (elves) in the lower ionosphere, the energetic radiation from lightning, and characterization of the Earth’s electromagnetic environment, as well as studying lightning interaction with various objects and systems. Reviewed here are models based on Maxwell’s equations ...
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ژورنال
عنوان ژورنال: The Open Atmospheric Science Journal
سال: 2008
ISSN: 1874-2823
DOI: 10.2174/1874282300802010261