A new algorithm for soil moisture retrieval using C and K-band Radiometer channels of ocean salinity satellite

摘要

A new soil moisture retrieval algorithm developed in this paper, using C- and K-band microwave radiometer channels of Ocean Salinity Satellite (OSS). In this new algorithm, K-band(23.8GHz) brightness temperature (BT) is used to estimate land surface temperature, and C-band BT in H polarization used to retrieve soil moisture by τ - ω model, in which soil roughness (h) and vegetation parameters (τ) are combined in a single factor for their similar change trends with BT. The validation is done using AMSR-E data of the same channels with Naqu soil moisture monitoring network data in the central Tibetan Plateau, result shows the new algorithm has very good accuracy, at correlation coefficient, bias and RMSE.