Retrieval of bare soil moisture from FY-3B/MWRI data

Abstract

This paper focuses on soil moisture retrieval study based on the measurements from the microwave radiation imager(MWRI) on board China's second-generation polar-orbiting meteorological satellite(FY-3).The advanced integral equation model(AIEM) was used to simulate FY-3B/MWRI radiance data for multiple surface parameters,and a soil moisture retrieval model is built based on the simulated radiance data.The model was used to retrieve bare soil moisture from four imageries acquired respectively on October 8th and 18 th and 28 th and November 8th in Northwest China.The retrieved soil moisture were evaluated by measured data.The results show that the determination coefficient between the retrieved and measured soil moistures is 0.604,the RMSE is0.030 5 cm3/cm~3,and hence the retrieved soil moisture is in good agreement with the measured data.