CMORPH satellite precipitation data downscaling method based on Fuzzy-OLS (Ordinary Least Squares)
A rain data, downscaling technology, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as low resolution, and achieve the effect of improving spatial resolution
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Embodiment 1
[0029] In this embodiment, traditional multiple regression is used for downscaling prediction, and the specific steps are as follows:
[0030] The whole country is selected as the research area, and the monthly rainfall in the wet season (May-October) of 2003-2009 is predicted and studied, and finally the monthly rainfall distribution map with a spatial resolution of 1km is obtained.
[0031] Step 1) Data acquisition: Obtain the CMORPH meteorological satellite remote sensing image data, MODIS satellite remote sensing image data and ASTERGDEM satellite remote sensing image data in the whole country, and at the same time collect the daily rainfall observation values of the ground observation stations in the national area; the MODIS satellite remote sensing image data Including MOD11A2 data product and MOD13A2 data product. Wherein: the spatial resolution of the CMORPH meteorological satellite remote sensing image data is 0.25°×0.25°, and the time resolution is 3 hours; the spa...
Embodiment 2
[0042] In this embodiment, the fuzzy-OLS method is used for regression modeling, and the specific steps are: In this embodiment, fuzzy clustering least squares regression is used for downscaling prediction, and the specific steps are as follows:
[0043] The whole country is selected as the research area, and the monthly rainfall in the wet season (May-October) of 2003-2009 is predicted and studied, and finally the monthly rainfall distribution map with a spatial resolution of 1km is obtained.
[0044] Step 1) Data acquisition: Obtain the CMORPH meteorological satellite remote sensing image data, MODIS satellite remote sensing image data and ASTERGDEM satellite remote sensing image data in the national area, and collect the daily rainfall observation values of the ground observation stations in the national area; the MODIS satellite remote sensing image The data includes MOD11A2 data product and MOD13A2 data product. Wherein: the spatial resolution of the CMORPH meteorologic...
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