抄録
Active microwave remote sensing is a powerful technique for a sea surface measurement. A basic principle of the sea surface measurement by active microwave remote sensing is to be difference in microwave backscatter from sea surface by the sea surface conditions. Some physical values of sea surface, such as wind, waves and currents can be obtained by analyzing of microwave backscatter from sea surface. In order to develop more advanced remote sensing technique of sea surface, it is necessary to understand the mechanism of microwave at sea surface in detail. This paper describes the characteristics of microwave backscatter from water surface and the relation between the physical values of water surface and microwave backscattering at that surface.