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首页> 外文期刊>IEEE Transactions on Geoscience and Remote Sensing >Evaluation of a long-range lightning detection network with receivers in Europe and Africa
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Evaluation of a long-range lightning detection network with receivers in Europe and Africa

机译：评估带有欧洲和非洲接收器的远程雷电探测网络

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This study focuses on the performance evaluation of the experimental long-range lightning detection network Zeus, with receivers located in Europe and Africa. The evaluation is carried out in terms of locating error and detection performance. Zeus' receivers record the radio noise (sferics) emitted by cloud-to-ground lightning discharges in the very low frequency (bandwidth between 5 and 15 kHz). The lightning location is retrieved by means of the arrival time difference (ATD) triangulation technique. The presented study includes evaluation of the system's locating error and detection performance over the African continent, equatorial/mid-Atlantic, the Caribbean, and northern South America. This dataset is validated over a period extending from July through October 2004. The Lightning Imaging Sensor onboard NASA's Tropical Rainfall Measuring Mission satellite is used as the validation source. The analysis shows that the number of receivers as well as their relative location (relative position of the flash-event to the network's receivers) plays a key role in the retrieval error magnitude. Median error values within the network's periphery are found to be approximately 20 km, while outside the periphery significantly larger (/spl sim/130 km). Simulation of chi-square values, implemented from the ATD algorithm, shows an adequate agreement between theoretical error-related computations and the network's retrievals. In terms of detection performance, the Zeus system is also validated over the same area/period. The chief observation is that the detection performance is likewise dependent on the number of receivers used by the system rather than their relative location.
机译：这项研究的重点是实验性远程雷电探测网络Zeus的性能评估，接收器位于欧洲和非洲。根据定位误差和检测性能进行评估。宙斯的接收器以非常低的频率（5至15 kHz的带宽）记录云对地闪电放电所发射的无线电噪声（铁氧体）。借助到达时间差（ATD）三角测量技术检索闪电位置。提出的研究包括评估系统在非洲大陆，赤道/中大西洋，加勒比海和南美洲北部的定位误差和探测性能。该数据集在从2004年7月到2004年10月的一段时间内进行了验证。NASA热带雨量测量任务卫星上的闪电成像传感器被用作验证来源。分析表明，接收器的数量以及它们的相对位置（闪烁事件相对于网络接收器的相对位置）在检索误差幅度中起着关键作用。发现网络外围的平均误差值约为20 km，而外围外围的误差值则明显更大（/ spl sim / 130 km）。通过ATD算法实现的卡方值仿真显示，理论上与错误相关的计算与网络的检索之间具有足够的一致性。在检测性能方面，Zeus系统还在相同的区域/时间段内得到验证。主要观察结果是，检测性能同样取决于系统使用的接收器数量，而不是它们的相对位置。

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