Method for inverting topsoil volumetric water content by employing multi-temporal observation data of geostationary meteorological satellite
A static meteorological satellite and observation data technology, applied to measuring devices, using re-radiation, radio wave measurement systems, etc., can solve the problems of lack of and inability to directly invert soil volume moisture content, etc.
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[0020] figure 1 The research flowchart for developing the soil moisture retrieval model for this study is shown. In the data simulation, we considered different vegetation coverage, soil texture and soil moisture. After obtaining the simulated data, we used a multiple linear stepwise regression method to determine the elliptic parameters (x 0 the y 0 , a, θ).
[0021] figure 2 A method for obtaining model coefficients using geostationary meteorological satellite data and surface soil moisture observation data is shown. Among them, the surface temperature and surface short-wave net radiation retrieved from stationary meteorological satellite data under sunny conditions are dimensionless, and the least squares method is used to fit the elliptic relationship model between the surface temperature and surface short-wave net radiation, and the ellipse parameters are calculated. At the same time, the average value of the soil moisture observation data in the pixel is selected t...
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