多普勒雷达降水产品优化

通过对雷达1h、3h降水产品进行应用检验,找出降水产品的局限性及其测量误差;利用反射率因子及自动站雨量资料,通过调整雷达混合扫描面弥补了降水产品因山脉等地物挡角大而缺测面大的缺陷;结合雨量站资料运用最优插值、卡尔曼滤波等方法对本地Z-I关系及降水产品进行调整优化;调整后的降水产品估测降水的误差明显减小,产品质量大为提高。

The Optimization of the Doppler Radar Precipitation Product

Though the application and examination of the radar precipitation in 1h and in 3h,the the limitation and its the measuring error is found.By using reflection factor and the precipitation of the auto weather stations,the radar mixed sweep surface is adjusted to make up the defect which occurred because the great angle exists and the surface exits a big flaw lack places;Union with the precipitation of the auto weather stations,the optimal interpolation method and Kalman filtering is used to adjust and optimize the local Z-I relationship and the precipitation product;After the adjustment,the error of estimated precipitation obviously reduces,the product quality is greatly the enhanced.