A soil moisture retrieval method for AMSR-E

For vegetated surfaces, the commonly used soil moisture (SM) retrieval algorithm is a zero-order model which might not be the best one for AMSR-E, since multiple scattering effects could not be ignored at higher frequencies. But due to the simplicity of the zero-order model, it still has the advantage in SM retrieval, except emission relationship between different frequencies of AMSR-E of both bare surface and vegetation exist. In this paper, a new method to retrieve SM for AMSR-E more accurately is proposed based on an emission simulation of a bare surface at C-, X- and Ku-band. The unknown variables elimination in retrieval is by finding the relationships of single scattering albedo (and optical opacity) of vegetation scatter between the same frequency ranges.