Title :
Unconnected upward leaders observed in Guangzhou during 2009–2010
Author :
Lu, Weitao ; Chen, Luwen ; Zhang, Yang ; Ma, Ying ; Yin, Qiyuan ; Chen, Shaodong ; Zhang, Yijun
Author_Institution :
Lab. of Lightning Phys. & Protection Eng., Beijing, China
Abstract :
More than ten unconnected upward positive leaders initiated from high structures in response to natural downward-moving negative leaders are analyzed. These leaders are observed by using high-speed cameras with sampling rates at the order of 104 fps (frames per second). The propagation velocity, channel width of the unconnected upward leader and the distances between it and strike point are presented. The results can deepen our understanding of the lightning attachment process.
Keywords :
lightning protection; channel width; lightning attachment process; propagation velocity; unconnected upward leaders; Cameras; High speed optical techniques; Joining processes; Lead; Lightning; Poles and towers; Spatial resolution;
Conference_Titel :
Lightning (APL), 2011 7th Asia-Pacific International Conference on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4577-1467-2
DOI :
10.1109/APL.2011.6110199
