中文摘要：

为了解S波段双偏振多普勒天气雷达的探测性能，开展了与CINRAD-SA观测数据的比对工作，分析了2部雷达测量的反射率因子值之间的差异；同时利用地面雨量计观测值作为基准，比较了2部雷达估测降雨量的效果。研究结果表明：双偏振雷达测量的反射率因子值比sA雷达要弱；利用双偏振雷达观测的‰，数据计算的降雨量与雨量计观测值最为接近，而月（ZH）方法和屁（ZH，ZDR）方法计算结果都明显低于雨量计测值，尺（ZDR,KDP）方法计算结果大于雨量计测值；SA雷达用R（z）方法的计算结果也低于雨量计测值，但要好于双偏振雷达的R（ZH）方法。

英文摘要：

For to know the measurement performance of S band wave dual-polarization Doppler weather radar, its data is been compared with C1NRAD-SA radar. The difference of reflectivity factor is analyzed between the two radars. After that, by mean of ombrometer observed data, the accuracy of the two radars to estimate rainfall is compared. The result shows that dual-polarization radar echo intensity is weaker than SA radar. The rainfall using KDp to calculate is proximal to ombrometer data. But R（Z.） and R （ZH ,ZDR） method is less than ombrometer data obviously. R（ZDR ,KDp） method is more than ombrometer data. SA radar data to estimate rainfall is less than ombrometer data, but its accuracy is more exact than R（ Zn ） method of dual-polarization radar.