【摘要】 在对国内外雷达定量估测区域降水量一些方法进行回顾的基础上,介绍了卡尔曼滤波校准和最优插值校准的基本原理,提出了综合利用两种校准方法优点的分步校准法进行区域降水量估测,并用2003年淮河流域暴雨过程的雷达和雨量计资料对以上的三种方法进行评估。评估结果表明:分步校准法无论在估测的精度还是稳定度上都优于其它两种方法。更多还原

【Abstract】 Techniques of estimating areal rainfall are firstly reviewed,and the principles of Kalman filter calibration and optimum interpolation calibration are introduced.Based on analysis of the two methods characteristics,the authors present a new method to estimate areal rainfall,i.e.,two-step calibration method.At the end,the radar data observed by the Doppler radar(CINRAD/SA) in Hefei and the raingauge data are used to evaluate the precision of the three methods.The results show that not only in precision but also in stability,the two-step calibration method is better than the other two methods.更多还原