双线偏振雷达的降水估测 Ⅱ.误差分类分析

PRECIPITATION ESTIMATE USING DUAL LINEAR POLARIZATION RADAR Ⅱ. CLASSIFIED ANALYSIS OF ERROR

详细地定量分析了降水估测中的ＺＲ关系和各类误差。由此可知，指数函数形式与幂函数形式的ＺＲ关系之间无明显差别；ＺＨ的参数因子ＡＨ不能太大；双线偏振雷达的测量误差导致的降雨强度估测误差在各类误差中最小；ＺＲ关系的不可拟合误差之标准差约为０．２１５，因而不容忽视。降雨强度的估测误差可认为呈一偏差逼近于０而标准差约为０．２６５的近正态分布，这对提高区域降水的估测精度尤为重要。

The Z R relation for precipitation estimating and all error were researched. The results are as following:There are not obvious difference between exponent and power function for Z R relation;Parameter A H about can't too big ;Estimate error of rainfall was the smaller in the all error using dual linear polarization radar;Standard error of no fit error for Z R relation can't be neglected because it was about 0.215;Estimate error of rainfall appeared a normal distribution that deviation near 0 and standard error is about 0.265,the result is very important for raising the precision of estimate area precipitation.