%0 Journal Article
%T Precipitation Calibration by Using Kalman Filter to Determine the Coefficients of the Variational Equation<br>用卡尔曼滤波确定变分方法中的权重系数进行雨量校正
%A Zhao Kun
%A Liu Guoqing
%A Ge Wenzhong
%A <br>赵坤
%A 刘国庆
%A 葛文忠
%J 气候与环境研究
%D 2001
%I 
%X We use the consecutive radar data collected in Fuyang and hourly raingague measurements during HUBEX in 1999 to correct radar-obtained rainfall field by combining variational analysis with Kalman filter. In this method, we determine the coefficients of the variational equation and Euler equation by Kalman filter so we can correct the radar-obtained rainfall from 5:00 June 27 to 18:00 June 27, 1999. In this case, the time between consecutive volume scan is ten minutes. By comparing the rainfall field gained in this way with that through averaging method and old variantional analysis method, we found we can gain the more accurate rainfall field by the new method.
%K variational method
%K Kalman filter
%K weighting coefficient
%K mean radar-rainfall-field bias<br>变分法
%K 卡尔曼滤波
%K 权重系数
%K 平均偏差场
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=28A2F569B2458C17&jid=484C10BAB5333C14751916EACFF8295F&aid=46DF983A732A9E28&yid=14E7EF987E4155E6&vid=B31275AF3241DB2D&iid=0B39A22176CE99FB&sid=F1A8654ADB4E656E&eid=D46BA3D3D4B3C585&journal_id=1006-9585&journal_name=气候与环境研究&referenced_num=10&reference_num=5