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Preliminary Evaluation of Hai‐Nan Lightning Detection Network (HNLDN)
Author(s) -
Yang Qingliu,
Wang Jiaquan,
Zhou Xiao,
Yuan Shangbo,
Meng Xiaoyang,
Xiao Fang,
Jin Hongling,
Xue Weiqing,
Ma Qiming
Publication year - 2021
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/2021rs007321
Subject(s) - lightning (connector) , thunderstorm , waveform , remote sensing , lightning detection , computer science , meteorology , environmental science , physics , real time computing , pattern recognition (psychology) , geology , telecommunications , artificial intelligence , power (physics) , radar , quantum mechanics
Abstract Hai‐Nan Lightning Detection Network (HNLDN) is composed of seven sites that accept very low frequency/low frequency (VLF/LF) signals. A total of seven sites are evenly distributed on Hai‐Nan Island. The baseline distance is between 50 and 150 km, which is about five times longer than in typical short‐baseline VLF/LF imaging networks. Each detection station uses zero‐phase digital filtering to avoid the phase deviation caused by filtering. HNLDN uses an improved peak search method to increase the number of detected of lightning waveforms, applies a One‐dimensional convolutional neural network (1D‐CNN) to identify and classify the waveforms, and to the increase the detection efficiency of intracloud lightning. This article analyzes three typical thunderstorm processes. From inside to outside the network, the detection efficiency of HNLDN relative to the advanced direction‐time lightning detection system (ADTD) is 239%, 181%, and 19%, respectively. It can be seen that the detection efficiency is negatively correlated with the distance from the thunderstorm to HNLDN. The average location error of HNLDN inside the network is 190 m.