襄阳新一代天气雷达Z-R关系本地化修正分析

Localization correction analysis for Z-Rrelation of Xiangyang new generation weather radar

文章利用襄阳市2016年1~12月223个区域站的降水与雷达数据资料,采用最优化 Z-R关系,再一次进行降水回波分类,得到适用于不同降水回波类型的Z-R 关系,选取几次降水过程中的利用OUP78号产品进行降水估计产品验证,默认 Z-R 关系比对实际降水有30%以上提升,且层状云降水估计结果优于其它降水回波类型,为新一代天气雷达本地化进一步奠定了基础。

According to precipitation and radar data of 223 regional stations in Xiangyang from January to December in 2016,this paper classifies precipitation echoes one more time by using optimized Z-R relation.The different Z-R relationships applied to different type of precipitation echoes are obtained.The verified precipitation estimation products based on No.OUP78 product in several rainfall processes are selected.The default Z-R relation can improve the actual precipitation by 30 percent than before.Then,the precipitation estimation for stratiform cloud is superior to other precipitation echo types,which can lay a further foundation for the localization of CINRAD.