Continuous broadband lightning VHF mapping array using MUSIC algorithm
Continuous broadband lightning VHF mapping array using MUSIC algorithm
复制标题
使用 MUSIC 算法的连续宽带闪电 VHF 测绘阵列
DOI：
10.1016/j.atmosres.2019.104647
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发表时间：
2020
影响因子：
5.5
通讯作者：
Yantao Duan
中科院分区：
文献类型：
--
作者：
Tao Wang;Lihua Shi;Shi Qiu;Zheng Sun;Yantao Duan
为了提高闪电放电过程的映射质量，提出了一种将多信号分类（MUSIC）算法应用于闪电甚高频（VHF）辐射源到达方向（DOA）估计的映射方法（MUSIC-VHF方法），并进行了验证。基于空间协方差矩阵的特征分解原理，推导了适用于任意平面阵列上雷电甚高频波段的宽带MUSIC算法。为了验证该方法的有效性，通过数值仿真测试了该方法在定位精度、空间分辨率和旁瓣抑制方面的性能。利用无人机（UAV）和便携式辐射源设计了现场实验来验证该方法。将该方法进一步应用于两个经典触发闪光的映射。两个放电通道的时间和空间发展可以很好地描述，包括向上的正先导、k -事件、段先导和随后的回射（SRS） VHF辐射。并与EMTR-VHF方法、干涉仪（INTF）技术进行了比较。对比结果表明MUSIC-VHF方法在空间分辨率、旁瓣窄带干扰抑制等方面具有较好的性能。此外，还报道了在一个观测窗口内同时发生的多源辐射现象，并给出了它们的定位结果。
In order to improve the mapping quality of lightning discharge processes, a mapping approach by applying multiple signal classification (MUSIC) algorithm to direction-of-arrival (DOA) estimation of lightning very high frequency (VHF) radiation sources is proposed (MUSIC-VHF method) and validated. Based on the principles of the eigen decomposition of the spatial covariance matrix, broadband MUSIC algorithm operating in lightning VHF ranges, on arbitrary planar array, is derived. To verify this method, numerical simulations were conducted for testing its performance in localization accuracy, spatial resolution and sidelobe suppression. Field experiments were designed to validate the proposed method, with an unmanned aerial vehicle (UAV) and a portable radiation source. The proposed method was further applied to map two classical triggered flashes. Temporal and spatial development of the discharge channels from the two flashes could be well depicted, including the upward positive leaders (UPLs), K-events, dart leaders and VHF radiations in subsequent return stroke (SRS). Additionally, comparisons among the proposed method and EMTR-VHF method, interferometer (INTF) technology are conducted. Comparison results show that the MUSIC-VHF method performs better in spatial resolution, sidelobe narrowband interference suppression. Moreover, the phenomena of multi-source radiations occurring simultaneously within a single observation window are reported, and their localization results are presented.
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DOI：
10.1007/s11430-008-0049-9
发表时间：
2008-09
期刊：
Science in China Series D: Earth Sciences
影响因子：
--
作者：
Guang-shu Zhang;Yuxiang Zhao;X. Qie;Tong Zhang;Yanhui Wang;Chengpin Chen
通讯作者：
Guang-shu Zhang;Yuxiang Zhao;X. Qie;Tong Zhang;Yanhui Wang;Chengpin Chen
对狭窄的双极事件的观察结果表明，雷暴是如何在雷暴中启动的。
影响因子：
16.6
作者：
Rison W;Krehbiel PR;Stock MG;Edens HE;Shao XM;Thomas RJ;Stanley MA;Zhang Y
通讯作者：
Zhang Y
DOI：
10.1002/2015jd023702
发表时间：
2016-01
期刊：
Journal of Geophysical Research: Atmospheres
影响因子：
--
作者：
Zhuling Sun;X. Qie;Mingyuan Liu;R. Jiang;Zhichao Wang;Hongbo Zhang
通讯作者：
Zhuling Sun;X. Qie;Mingyuan Liu;R. Jiang;Zhichao Wang;Hongbo Zhang
闪电 VHF 辐射的多天线观测和 EMTR 处理
影响因子：
3.9
作者：
Wang Tao;Shi Li Hua;Qiu Shi;Sun Zheng;Zhang Qi;Duan Yan Tao;Liu Bo
通讯作者：
Liu Bo
影响因子：
5.2
作者：
R. Mardiana;Z. Kawasaki
通讯作者：
R. Mardiana;Z. Kawasaki