L-band Emission of a Bare Soil Rough Surface and a Rough Soil Surface Covered with a Grass Litter Layer: Comparison between Experimental Data and a Numerical Modeling Approach
نویسندگان
چکیده
In the context of the European Space Agency’s (ESA) Soil Moisture and Ocean Salinity (SMOS) mission, we present a study of the emission of rough surfaces at 1.4 GHz and the effects on this emission of a grass litter layer covering the surface. Surface roughness has been studied in some depth in the literature as it is a key influencing parameter on ground emission. However there remains a need to further develop our understanding and modeling of its effects. A litter layer has also been shown to greatly affect the L-band emission of forests, making it difficult to retrieve soil moisture from space-based radiometer measurements over forests, [1] [3], but the effects of this layer on the overall forest emission have been little investigated and are not yet well understood.
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