Three-dimensional VHF Observations Using AdvancedVHF Broadband Digital Interferometer

摘要：

Lightning Research Group of Osaka University (LRG-OU) has been improving the VHF broadband digital interferometer (DITF) for thunderstorm observations. The advanced VHF broadband DITFs enable us to locate the impulsive VHF radiation sources caused by lightning discharges with high resolution in three-dimension. As a result of the three-dimensional VHF observations conducted during the ’06-’07 monsoon season in Darwin, Australia, a new type of leader progressions in thunderclouds is found. In some cloud-to-cloud (CC) lightning flashes, the first leader followed by subsequent leaders with hundreds milliseconds interval is noticeable. Considering the channels and their developing velocities of the first and subsequent leaders, it is understood phenomenologically that these CC flashes correspond to multiple strokes in case of cloud-to-ground (CG) flashes. 70 CC flashes with “multiple CC strokes are recorded in this campaign.

作者: Manabu AKITA Kenji HIRAI Masahito SATOH Yoshitaka NAKAMURA Takeshi MORIMOTO Tomoo USHIO Zen KAWASAKI

作者单位: Lightning Research Group of Osaka University

会议类型: 国际会议

会议名称: 第13届国际大气电学会议(The 13th International Conference on Atmospheric Electricity)

会议地点: 北京

会议语种:英文

在线出版日期: 2007-08-13（万方平台首次上网日期，不代表论文的发表时间）