Validation on retrieving land surface parameters using SMMR data in Takelamagan

Retrieval algorithm developed by Njoku et al. has been used by AMSR-E, but this algorithm has not yet been validated in desert area. In this paper, we use radiative transfer equation cooperated with bounded Levenberg-Marquardt method to retrieve land surface parameters such as surface temperature, dielectric constant, roughness and atmosphere moisture. By using climatic and meteorological data acquired by meteorology observation station in and around the desert, we then do a detailed validation. The result shows that the accuracy of retrieved temperature is within 2 K, the average dielectric constant of this area is 2.73 in winter. And the algorithm will underestimate surface temperature of desert in summer