出版社：Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences
摘要：The objective was to parameterize a modified water cloud model using crop coefficients (A and B).These crop coefficients were derived from Landsat-8 and Sentinel-2 data.Whereas coefficients C and D are of soil parameters.The water cloud model was modified using crop coefficients by minimizing the RMSE between observed VVσ0 and Sentinel-1 based simulated VVσ0.The comparison with observed and simulated VV polarized σ0 showed low RMSE (0.81 dB) and strong R2 of 0.98 for NDVI-EVI combination.However, based on other possible combinations of vegetation indices VVσ0 and simulated VVσ0 do not show a good statistical agreement.It was observed that the errors in crop coefficients (A and B) are sensitive to errors in initial vegetation/canopy descriptor parameters.
