返回散射电离图仰角信息提取方法研究  

Research on Extraction Method of Elevation from Backscatter Lonogram

作　　者：华彩成[1] 王世凯[1] 张成峰[1] 冯静[1] HUA Cai-cheng;WANG Shi-kai;ZHANG Cheng-feng;FENG Jing(China Research Institute of Radio Wave Propagation,Qingdao,Shandong 266107,China)

机构地区：[1]中国电波传播研究所

出　　处：《电子学报》2019年第11期2438-2442,共5页Acta Electronica Sinica

基　　金：国防技术基础(No.JSHS2016210C009,No.JSHS2018210A001)

摘　　要：利用短波二维天线阵列,在国内首次获得了高频返回散射扫频-仰角电离图,本文结合遗传算法和Otsu法对群距离-频率-能量三维电离图进行信号区域提取,通过连通域标记方法进行离散点噪声消除,获取"干净"信号,然后利用Canny算子获得频率对应回波信号分布的最近和最远群距离,在群距离-频率-仰角三维电离图上,提取相应频率的仰角-群距离分布数据,分别利用线性曲线拟合、对仰角求对数拟合和对群距离求对数拟合的方式对数据点进行处理,通过青岛观测站的测高仪数据对拟合后的曲线分别进行了误差分析,结果显示,对群距离求对数拟合得到的曲线与目标曲线的符合较好,证明了提取方法的有效性.Utilizing short-wave two-dimensional antenna arrays,the HF backscatter sweep frequency-elevation ionogram is obtained for the first time in China.In this paper combining genetic algorithm and Otsu for the signal extraction of the group-frequency-energy three-dimensional ionogram.Using the connected domain marking to eliminate discrete point noise,obtain the clean signal,and use the Canny detetion method to obtain the nearest and farthest distance of each frequency in the echo signal.On the group-frequency-elevation three dimensional ionogram,the elevation-group data of each frequency is acquired,Fitting the points by the polynomial fitting,logarithmic fitting of the elevation and logarithmic fitting of the group,Finally performing error analysis of the fitted curve through the vertical detection data of the Qingdao observation station.The result show that the logarithm of the group obtained curve is in good agreement with the target curve.The validity of the extraction method is proved.

关 键 词：短波 二维阵列 电离图 仰角 拟合方法 

分 类 号：TN011[电子电信—物理电子学]