To remove vegetation effect in soil moisture retrieval by passive microwave technique at lower frequencies, the τ-ω model is often used. In order to evaluate the scattering and attenuation characteristics of vegetation at higher frequencies, a Matrix-Doubling microwave emission model based on ray-tracing technique was used on corn, to study its single scattering albedo and transmissivity with different height at C （6.925GHz）, X （10.65GHz） and Ku （18.7GHz） bands. The comparison between simulation results and the data collected by a truck-mounted microwave radiometer in a field experiment are good. To verify the simulated emission from corn layer only, the ground surface of corn field was placed with an Aluminum foil, so as to mask the emission from the soil. A Brightness Temperature database was setup by assigning a variety of parameters to the verified model, to simulate Brightness Temperature of natural corn field with different height. The results by the Matrix-Doubling model were then matched with those by τ-ω model at the same condition by least-square deviation, so as to retrieve the effective single scattering albedo and transmissivity of corn at C, X and Ku-band.

Matrix-Doubling;microwave emission;single scattering albedo;τ-ω model