摘要
雷达定量测量降水主要依据是Z-R关系。目前对于其中系数A、b选取影响估测降水精度的研究工作很多,但是在工作中如何选取合适的Z值的研究工作较少。本文则利用固定的A=280、b=1.45值研究反射率因子Z值选取对估测降水精度的影响。结果表明,综合考虑时间、仰角高度等因素的选取方法其结果要优于单层单体扫过程的结果。
Radar rainfall estimate is based on the Z - R relationship. There have been many works on the selection of A, b in the formula that affect precipitation estimation accuracy, but how to select the appropriate Z value is a necessary work. The article used the settled Z - R relationship to find out the affection among the selection of Z in precipitation estimate. The result shows that the accuracy of precipitation estimation based on the average Z selection method is better than any single scanning selection method.
出处
《高原山地气象研究》
2013年第3期70-76,共7页
Plateau and Mountain Meteorology Research
关键词
雷达
定量测量
Z—R关系
Z值
估测精度
radar, quantitative measurement, Z - R relationship, Z value, estimation accuracy
