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首页> 外文期刊>Electric power systems research >Day-to-day differences in the characterization of lightning observed by multiple high-speed cameras
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Day-to-day differences in the characterization of lightning observed by multiple high-speed cameras

机译：多个高速摄像机观察到的闪电特征的日常差异

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摘要

This study aims to analyze how the visible parameters of cloud-to-ground discharges such as the flash multiplicity and duration, the interstroke interval, the continuing current duration and the number of ground contacts per flash vary between observations conducted on different days. Several authors have already analyzed these parameters for groups of thunderstorms in some regions. Although some authors did not find differences on those characteristics for different regions, there has not been a comprehensive amount of lightning recordings from the same thunderstorm in order to evaluate such parameters in a storm-to-storm basis. The lightning data for this work was obtained by four high-speed cameras set to operate at 2500 frames per second. They were located in Sao Jose dos Campos, Brazil, and in its neighboring region as part of the RAMMER project (Portuguese acronym for Automated Multi-Camera Network for Monitoring and Study of Lightning Flashes). Five thunderstorm days were selected for this study, during which a total of 361 flashes were recorded. This is the first study in which four high-speed cameras observed the same thunderstorm from different locations. Because of the number of cameras and their positions, the coverage area is larger than usual single-camera studies, thereby increasing the number of flashes recorded from the same thunderstorm. These larger samples allow a more representative analysis of the lightning parameters mentioned above.
机译：这项研究旨在分析在不同日期进行的观测之间，云对地面放电的可见参数，例如闪光的多重性和持续时间，中风间隔，持续电流持续时间以及每次闪光的地面接触数量如何变化。一些作者已经对某些地区的雷暴组分析了这些参数。尽管有些作者没有发现不同地区在这些特征上的差异，但是对于同一暴风雨，为了在暴风雨到暴雨的基础上评估这些参数，还没有大量的雷电记录。这项工作的闪电数据是通过设置为每秒2500帧的四个高速摄像机获得的。它们作为RAMMER项目的一部分（位于巴西的圣何塞杜斯坎普斯及其邻近地区）（葡萄牙语缩写为“自动多相机网络，用于监视和研究雷电闪光”）。本研究选择了5个雷暴天，在此期间共记录了361次闪光。这是第一项研究，其中四个高速摄像机从不同的位置观察到相同的雷暴。由于摄像头及其位置的数量，其覆盖范围比通常的单摄像头研究更大，从而增加了同一场雷暴记录的闪光次数。这些较大的样本可以对上述雷电参数进行更具代表性的分析。

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  • 来源
    《Electric power systems research》 |2015年第1期|93-100|共8页
  • 作者

    L.S. Antunes; A.C.V. Saraiva; O. Pinto Jr.; J. Alves; L.Z.S. Campos; E.S.A.M. Luz; C. Medeiros; T.S. Buzato;

  • 作者单位

    ELAT, Atmospheric Electricity Group, INPE, National Institute for Space Research, Sao Jose dos Campos, SP, Brazil;

    ELAT, Atmospheric Electricity Group, INPE, National Institute for Space Research, Sao Jose dos Campos, SP, Brazil;

    ELAT, Atmospheric Electricity Group, INPE, National Institute for Space Research, Sao Jose dos Campos, SP, Brazil;

    ELAT, Atmospheric Electricity Group, INPE, National Institute for Space Research, Sao Jose dos Campos, SP, Brazil;

    ELAT, Atmospheric Electricity Group, INPE, National Institute for Space Research, Sao Jose dos Campos, SP, Brazil;

    ELAT, Atmospheric Electricity Group, INPE, National Institute for Space Research, Sao Jose dos Campos, SP, Brazil;

    ELAT, Atmospheric Electricity Group, INPE, National Institute for Space Research, Sao Jose dos Campos, SP, Brazil;

    ELAT, Atmospheric Electricity Group, INPE, National Institute for Space Research, Sao Jose dos Campos, SP, Brazil;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Lightning characteristics; High speed cameras; Thunderstorm days;

    机译：雷电特性;高速相机;雷雨天;

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