X波段双线偏振雷达反射率不同衰减订正法对比研究  

Comparison of Different Attenuation Correction Methods for the Reflectivity of X Band Dual Linear Polarization Radar

作　　者：袁玲玲 YUAN Ling-ling

机构地区：[1]辽宁海警第一支队司令部,辽宁大连116000

出　　处：《信息技术与信息化》2018年第4期184-186,共3页Information Technology and Informatization

摘　　要：X波段雷达的强衰减一直是制约其探测精密度及践行应用的主要方面,最根本目的是寻找最优的衰减订正方式,落实对X波段雷达数据的即时衰减校正。中国气象科学研究院的X波段双线偏振雷达,利用2016年5月在辽宁省海外场实验获得的一批观测资料,对世界各国已有的一些订正方法的效果进行了分析查验。为查验订正效果,将一段时间的辽宁省的S波段双偏振雷达数据作为标准。为更好地实行对比,将辽宁省的S波段双偏振雷达数据实行坐标转换和插值分析,从而获得与辽宁省雷达数据一致仰角、方向角、间距库的反射率值,并分析修正后的效果。选择一个径向的反射率值实行考证前与考证后的数据定量分析,并且与坐标转换后的辽宁S波段雷达同一个径向的反射率值进行横向对照,其中主要选择ZH订正法、KDP订正法、"ZPHI"降雨廓线订正算法实行分析对比。研究说明,KDP订正法、"ZPHI"订正法订正结果较好,比ZH订正法显示出了超强的优越性。The strong attenuation of X band radar is always the main aspect restricting its precision,practice and application.Our most fundamental aim is to find the best way of attenuation correction,and implement the real-time attenuation correction for X band radar data.The X band dual linear polarization radar of the Chinese Academy of Meteorological Sciences was collected from a batch of observational data collected in Liaoning overseas field in May 2016.For the inspection of the correction effect,the S band in a period of time in Liaoning Province,the dual polarization radar data as the standard,in order to better implement the contrast,the S band dual polarization radar data of Liaoning province to implement the coordinate transformation and interpolation analysis,so as to obtain radar data in Liaoning Province and consistent elevation,azimuth,distance between base reflectivity value analysis of the effect of the modified.A radial reflectivity value is selected to carry out quantitative analysis before and after textual research,and is compared with the same radial reflectance value of Liaoning S band radar after coordinate transformation.The main selection of the ZH correction method,the KDP correction method and the"ZPHI"rainfall profile correction algorithm are analyzed and compared.The research shows that the KDP correction method and the"ZPHI"correction method are better in the revised results,and show the superior superiority compared with the ZH correction method.

关 键 词：X波段双线偏振雷达 衰减订正 反射率 

分 类 号：TN957.52[电子电信—信号与信息处理]