8 November 2014 Simulation of microwave brightness temperature over heterogeneous land surface using L-MEB model in HIWATER
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Abstract
Soil moisture is an important parameter in hydrological circulation. For the microwave signal at L-band is very sensitive to the soil moisture, there have been many algorithms to retrieve soil moisture at L-band. The Soil Moisture and Ocean Salinity (SMOS) mission is launched in 2009, and the surface soil moisture retrieving is based on the inversion of the Lband Microwave Emission of the Biosphere (L-MEB) radiative transfer model. Due to the heterogeneity of the surface, the capability of the model remains to be verified in some region. In the study, the brightness temperature at L-band in Heihe River Basin is simulated by using the τ-ω model firstly. Secondly, the sensitivity analysis of the model on the parameters is conducted to get the optimal results. At last, the simulated brightness temperature is calculated by using the adjusted parameters, and the PLMR microwave brightness temperature is used to validate the simulation results. It turns out that the root-mean-square errors between L-MEB simulated and PLMR are 9K to 12K for V-polarization, and 6K to 8K at H-polarization respectively at different angles, which proves the L-MEB model have an good capability in the of China.
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Shuang Yan, Shuang Yan, Lingmei Jiang, Lingmei Jiang, Juntao Yang, Juntao Yang, Xiaokang Kou, Xiaokang Kou, } "Simulation of microwave brightness temperature over heterogeneous land surface using L-MEB model in HIWATER", Proc. SPIE 9260, Land Surface Remote Sensing II, 92600Q (8 November 2014); doi: 10.1117/12.2069374; https://doi.org/10.1117/12.2069374
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