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利用相关系数法及散点斜率法研究气象卫星降水数据在时间尺度上的精度检验。以黑河流域为研究区,利用25个水文站点的实测降水量在年尺度、月尺度和日尺度上验证了气象卫星降水数据的精度。结果表明:在整体上,气象卫星年降水数据和月降水数据与站点实测降水数据相关性很好,在月尺度上相关系数可以到达0.962,数据精度较高,数值上比站点实测降水量偏低,偏差相对较小。气象卫星日降水数据与站点实测降水数据相关性很差,数据精度较低,偏差相对较大。就单个站点而言,大部分站点相关系数较高,但偏差较大。
Using correlation coefficient method and scatter slope method to study the precision test of meteorological satellite precipitation data on the time scale. Taking Heihe River Basin as the research area, the precision of meteorological satellite precipitation data was verified on the annual scale, monthly scale and daily scale using the measured precipitation of 25 hydrological stations. The results show that, on the whole, the annual precipitation data and monthly precipitation data of the meteorological satellite have a good correlation with the measured rainfall data at the site, and the correlation coefficient can reach 0.962 on the monthly scale with higher data accuracy and lower numerical value than the measured precipitation at the site , The deviation is relatively small. The correlation between meteorological satellite daily precipitation data and station measured precipitation data is very poor, the data accuracy is low and the deviation is relatively large. For a single site, most of the site correlation coefficient is higher, but the deviation is larger.