Earth's surface brightness temperature measured by the microwave radiometer SMOS, and the problem of soil moisture recovering
P.N. Dagurov, A.V. Dmitriev, Zh.B. Dymbrylov, S.B. Radnaeva
Institute of Physical Material Science of the Siberian Branch of the RAS, 670047, Ulan-Ude, 8, Sakhyanovoy str
Keywords: microwave sensing, brightness temperature, soil moisture, layered soil
Abstract
The angular and polarization dependencies of the brightness temperature measured by the spaceborne radiometer SMOS in L-band on different parts of the earth's surface are shown. It is found that in some cases the results are not described by the existing model for the reflection coefficient of microwaves, which leads to errors in recovering the soil moisture. It is shown by calculation that the layered structure of soil moisture has a significant impact on the behavior of brightness temperature. It is proposed to expand the moisture-recovering algorithm by the method which takes into account possible layered structure of the soil moisture.
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