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  • 关键词:闪电快电场信号, 时频特性, 小波变换, 云闪, 地闪
    摘要:

    应用小波变换方法将具有短时非平稳特点的闪电快电场时域波形信号转换到二维的时频平面,从时间和频率上同时描述闪电快电场信号的电场强度或相对能量分布,揭示其所包含的不同频率分量及其随时间变化的特性。分析结果表明,基于小波变换...

    发表年度:2016
  • 关键词:Global Positioning System, Data Assimilation System, Era-Interim Reanalysis, Tropical Tropopause
    摘要:

    We compared the correspondence of tropopause heights over China calculated from the gridded temperature data provided by the ERA-Interim project, NCEP/NCAR Reanalysis Projects-1 (NCEP-1), and Japanese 25-year Reanal...

    发表年度:2016
  • 关键词:Optical images, Intracloud Discharges, CG flashes
    摘要:

    Based on the images from the high-speed video camera systems, the statistics of the CG flashes was made in five different regions of the China. During the 11 years, 103 CG flashes were captured. 35.9% out of them ha...

    发表年度:2016
  • 关键词:闪电三维定位网络, 测量精度, 标准偏差, 几何模型, 理论误差
    摘要:

    利用自制的探空球载闪电模拟源对青海大通地区建立的闪电VHF 辐射源三维定位网络的精确度进行了实验研究, 通过探空闪电模拟源携带的GPS 飞行轨迹, 对观测网络中心上空附近和网络外辐射源定位的误差进行了估算, 并与模型理论计算作比....

    发表年度:2015
  • 关键词:Positive CG lightning flash, Positive leader, In-cloud discharge process, Optical images, Electric field change
    摘要:

    The characteristics of five downward positive cloud-to-ground (CG) flashes were analyzed based on images from a high-speed video camera and electric field (E-field) changes from slow antenna and fast antenna systems...

    发表年度:2015
  • 关键词:Electric field, charge structure, Charge density
    摘要:

    An electric field sounding system, based on corona discharge, was designed to measure the vertical component of the electric fields in a thunderstorm. The decay stage of a thunderstorm that occurred during the night...

    发表年度:2015