Downscaling method for APHRODITE rainfall data
A downscaling, SM2RAIN-ASCAT technology, applied in the direction of rainfall/precipitation gauges, measuring devices, instruments, etc., can solve the problems of low spatial resolution and cannot meet the needs of regional small-scale applications, and achieve high accuracy and quality results
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[0054]Example
[0055]Select Zhejiang Province (118°01'-123°08'E, 27°01'-31°10'N) as the research area, using the 2015 GPM-IMERG and SM2RAIN-ASCAT precipitation data sets and including SRTM DEM, Slope Auxiliary datasets of, Aspect, Lon and Lat, downscaling the APHRODITE daily precipitation dataset of the same period, and finally get APHRODITE precipitation data with a time resolution of 1 day and a spatial resolution of 0.1°×0.1°. The downscaling method is as follows:
[0056]Step 1) Data acquisition: Obtain the GPM-IMERG data set, SM2RAIN-ASCAT data set and APHRODITE daily precipitation data set of the study area. Obtain an auxiliary data set of environmental factors in the same research area. The spatial resolution of the auxiliary data set is higher than that of the APHRODITE daily precipitation data set. The auxiliary data set includes SRTM DEM digital elevation model, slope Slope, aspect, and longitude Lon And Lat. The longitude Lon and the latitude Lat are respectively obtained by c...
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