Analysis of Optical Characteristics of Physical Processes in Rocket-triggered Lightning
A comparison is made between the high-speed photography data of two rocket-triggered negative lightning flashes. The analysis shows: the initial propagation velocity of upward positive leader (UPL) in altitude-triggered negative lightning (ATNL) is about one order of magnitude lower than that in classical-triggered negative lightning (CTNL), while the triggering height of ATNL is higher than that of CTNL; the afterglow time of metal-vaporized part of the lightning channel can endure about 160~170ms. According to the different characteristics of the luminosity change of the lightning channel, together with the observation of the electric field changes, the processes after return-stroke (RS) can be distinguished into three types. Statistically, the interval of RS with M component is longer than that of RS without M component. The distinction between the relative luminosity of the lightning channel before RS and that before M component is obvious. The former is very weak or even invisible, while the latter is still considerable luminous.
Weitao Lu Yijun Zhang Xiuji Zhou Qing Meng Dong Zheng Ming Ma Fei Wang Shaodong Chen Xiushu Qie
Laboratory of Lightning Physics and Protection Engineering,Chinese Academy of Meteorological Science Laboratory of Lightning Physics and Protection Engineering,Chinese Academy of Meteorological Science Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Academy of Sciences,
国际会议
第13届国际大气电学会议(The 13th International Conference on Atmospheric Electricity)
北京
英文
2007-08-13（万方平台首次上网日期，不代表论文的发表时间）