Features of the brightness characteristics of the south of Western Siberia and Northern Kazakhstan during snow ablation measured by SMOS-satellite

Results of the analysis of brightness characteristics of soil during freezing/thawing process and frozen state are presented. It is found that the brightness temperature measured by MIRAS radiometer of the SMOS-satellite, changes only slightly during the soil freezing due to the climatic and geographical features of the south of Western Siberia. It is shown that satellite data like ground measurements poorly correlate with the parameters characterizing the state of the soil while it is in the frozen state. The effect of azimuth survey regarding from the meridional direction at the time evolution of brightness temperature during snow thawing was observed. Founded dependences should be taken into an account in the processing and use of the SMOS satellite radiometric data.