利用测雨雷达信息计算区域降水量方法的研究

Regional rainfall calculation using rain-detecting radar information

天气雷达覆盖面广、实时性强，对于观测区域内任意点都有回波与其对应。拟用测雨天气雷达信息来进行有关雨量的计算以弥补单纯依靠有限个雨量站点计算面雨量的不足。由于测雨雷达在探测过程中受各种因素制约，精度偏低，因此需要校正，采用了变分法和卡尔曼滤波相结合的雷达回波校正方法。

The weather radar, possessing a wide coverage and accurate real-time response, has back waves corresponding to arbitrary points within its coverage. The information of the rain-detecting radar is to be used for calculating the regional rainfall so as to improve the relevant calculation solely based on data from limited rain gauge stations. During its track-while-scan, the rain-detecting radar encounters various restraining factors and the radar information may be lack of resolution, therefore calibration is needed. The combination of differentiation method and Karmen wave clutter filter is adopted for radar's back wave calibration.