摘要
本文提出排序配对逼近法来拟合１９９３—１９９４年１３１４次雷达和雨量计的取样资料，这样既弥补了线性回归法的不足，又提高了区域降水估测的精度。由误差分析知道：估测１０００ｋｍ２以上区域的降水时，对双线偏振雷达而言，其估测精度将极有可能降低到１０％以下且比常规雷达有明显改善；双线偏振雷达的两种估测公式之间差异不大；按降水强弱分型处理可提高常规雷达估测精度。
In the paper,Asp(approximation after sort and pair) method have been put forward for get parameters of rainfall estimate.The paper use 1314 samples of radar and 17 precipitation stations at 1993—1994.This method make up the defect of linear regression and raise the precision of area rainfall estimate. Having analysed the errors, have gained the result: When estimate area precipitation more than 1 000km 2 using dual linear polarization radar,the error will redeced to under 10% probably, it is better more than conventional radar; The difference between estimate formulas of dual linear polarization radar can overlook;The method of estimate area rainfall in classified parameters is only effective using conventional radar.
出处
《气象学报》
CSCD
北大核心
1997年第1期103-109,共7页
Acta Meteorologica Sinica
基金
"八五"攻关课题
国家自然科学基金
关键词
双线偏振雷达
降水分析
估测精度
Dual linear polarization radar,Rainfall density,Approximation after sort and pair(ASP).
