超分辨率数据技术在双极化天气雷达中应用.pdfVIP

超分辨率数据技术在双极化天气雷达中的应用 黄凡, 李学华, 田秋萍, 曾勇 （成都信息工程学院 电子工程学院，成都 610225） 摘 要  超分辨率处理技术有利于提高天气雷达对中尺度气旋和龙卷风等灾害性天气探测能力的提高，有利于 天气雷达获得更精细的天气过程回波特征。本文把超分辨率技术引入到双极化天气雷达的应用中，在计算 双极化基本产品前，首先对IQ数据进行了方位加窗和距离去平均处理。方位加窗后使雷达有效波束宽度降 低，从而使方位分辨率得到了提高；距离去平均后，距离分辨率恢复到与发射脉冲宽度匹配，使得比现有 雷达基数据的分辨率得到了提高。初步实验表明，超分辨率技术在双极化雷达中有一定应用效果。  关键词：天气雷达，超分辨率，双极化雷达，I\Q数据 The Application of Super-resolution Technique in Dual-polarized Weather Radar HUANG Fan, LI Xue-hua, TIAN Qui-ping , ZENG Yon (School of Electronic Engineering，Chengdu University of Information Technology ，Chengdu 610225) Abstract The super-resolution processing technology is beneficial to improve the severe weather of the weather radar for mesoscale cyclone and tornado,and is helpful for weather radar to obtain more finer characteristics of weather echo.In this paper,super-resolution technology is applied to dual polarization weather radar,we process IQ data by adding window in azimuth and removing the processing of range average before getting dual-polarized basic products . The effective radar beam width will reduce after after adding window in azimuth so that the azimuth resolution is improved.By removing the processing of range average,the range resolution is restored to match the width of the transmit pulse which makes resolution of the radar basic data is higher than existing resolution. Preliminary experiments shows that the super-resolution technology has some effects on dual-polarized radar application . Key word: weather radar, super-resolution, Dual-polarization Radar, I/Q Data 1 引言 双极化雷达是近 30 多年来发展起来的新型天气雷达，其探测原理是基于电磁波的散射 特性。与常规多普勒天气雷达系统相比，双极化雷达不仅可获取回波强度，径向速度，速度 谱宽，还可以探测到降水系统的差分反射率因子，差分相移，退偏振因子，相关系数