Luminosity characteristics of multiple dart leader/return stroke sequences measured with a high‐speed digital image system
Luminosity characteristics of multiple dart leader/return stroke sequences measured with a high‐speed digital image system
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DOI：
10.1029/2003gl018613
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发表时间：
2004-01
影响因子：
5.2
通讯作者：
D. Wang;N. Takagi;X. Liu;T. Watanabe;A. Chihara
中科院分区：
文献类型：
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作者：
D. Wang;N. Takagi;X. Liu;T. Watanabe;A. Chihara
利用新研制的高速数字光学系统，我们测量了一个高塔上发生的闪光中的四个前导/回击序列的光度分布。通过分析这些剖面，我们获得了两个简单的表达式来表征沿着通道底部210 m的后续回击的光脉冲衰减特征。沿着通道底部210 m。这些表达式可以推广到回击脉冲电流，并很容易地包括在回击建模。此外，我们发现，在不同高度的领导人和它的后续回击的峰值光强呈正相关的通道底部210米。
Using a newly‐developed high‐speed digital optical system, we measured the luminosity profiles of four leader/return stroke sequences within a flash occurred on a high tower. By analyzing those profiles, we obtained two simple expressions to characterize the light pulse decay features of subsequent return strokes along the channel bottom 210 m. These expressions can be extended to return stroke pulse currents and be easily included in return stroke modeling. In addition, we found that the peak light intensity of a leader and its following return stroke at various heights correlates positively in the channel bottom 210 m.