中文摘要：

本文以从1998—2013年黄河流域122个站点的降水数据为研究对象,在年、季、月时间维度上借助相关系数与均方根误差对站点的TRMM（Tropical Rainfall Measuring Mission）降水数据进行精度检验,结果表明：年尺度上,TRMM 3B43数据质量较高;季尺度上,四季的拟合优度较高,其中秋季的数据质量最高,而夏季最低;月尺度上,站点降雨量与TRMM 3B43之间相关性显著,月降水数据具有较好的精度。就单个站点而言,TRMM对研究区内的绝大多站点的降水量估计存在着不同程度的＂低估＂现象。

英文摘要：

Taking the precipitation data of 122 stations in the Yellow River Basin as the research object, using the correlation coefficient and root mean square error, in time dimension of year, season and month, the accuracy of precipitation data on the site of the TRMM （Tropical Rainfall Measuring Mission） was tested. The results showed that： on the annual scale, TRMM 3B43 data quality is high; on the seasonal scale, goodness of fit of the four seasons is high, the highest quality data is in autumn, and lowest in summer： on the month scale, the correlation between site rainfall and TRMM 3B43 is obvious, the monthly precipitation data has good accuracy. In terms of a single site, there are different degrees of ＂underevaluated＂ phenomenon for most site precipitation in the study area estimated by TRMM