Impedance model of sea surface at S-L-band

A novel impedance electromagnetic model is proposed in order to compute sea surface microwave emissivity at S-L-band. The method is based on the representation of a rough and nonuniform air-sea interface by multilayer transition dielectric structures with characteristic impedances. The impedance of the sea surface is defined as a function of electromagnetic and many geophysical parameters (statistical, deterministic) including surface wave spectrum, sea surface salinity, and temperature. It is assumed that an impedance approach is more robust, convenient, and easy to use for analysis of real world microwave radiometric data. In particular, impacts of sea surface roughness on emissivity can be described and illuminated much better than by using other microwave emission models or approximations. Some applications for the retrieval purposes are discussed as well.