Determination of Lightning Properties from Single Station Wideband Electric Field Measurements

通过单站宽带电场测量确定闪电特性

• 批准号: 9014085
• 负责人: Martin Uman
• 金额: $ 31.8万
• 依托单位: University of Florida
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-01-15 至 1994-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9014085&HistoricalAwards=false
• 关键词: Determination; Lightning; Properties; Single; Station

Analog tape records of the electric fields of lightning flashes, which occurred during seventeen Florida thunderstorms, will be analyzed for statistical properties of various lightning processes. We will digitize data from our analog tape records; particular attention will be paid to: (1) microsecond-scale pulses associated with continuing current, K-processes, M- components, preliminary breakdown, and leaders in negative ground flashes, (2) the shapes of M-component field changes in negative ground flashes, (3) the characteristics of ground flashes that can be used to predict the presence of continuing current, (4) positive flashes to earth, and (5) microsecond-scale pulses in cloud flashes. Lightning models will be derived or modified based on the results of the analyses.

模拟磁带记录了佛罗里达17次雷暴中闪电的电场，将分析各种闪电过程的统计特性。我们将把模拟磁带记录中的数据数字化；将特别注意：(1)与持续电流、k过程、M分量、初步击穿和负地闪中引线相关的微秒级脉冲，(2)负地闪中M分量场变化的形状，(3)可用于预测持续电流存在的地闪特性，(4)对地正闪，(5)云闪中的微秒级脉冲。闪电模型将根据分析结果导出或修改。