Research on electromagnetic scattering from ocean surface with foams by the modified facet-model

Abstract

ABSTRACTThe ocean surface electromagnetic (EM) scattering properties have important applications in marine environmental monitoring and detection of target on the sea. In this article, the accurate model is built to calculate the permittivity of sea water at different sea areas with foams. The relationships between the foam coverage and air-sea temperature and wind speed are analyzed. Then based on the facet-model theory, the modified two-scale model (MTSM) and Vector Radiative Transfer (VRT) theory, the modified facet-based two-scale model (MFBTSM) with foams is presented. To make the scattering model conform better to the practice, the cut-off wavenumber at actual wind speed and frequency of incident wave is considered. Based on satellite data of ocean salinity and temperature at the Western Pacific and Southeast coast, the electromagnetic scattering properties from complex ocean surface with foams at different sea areas are analyzed. On this basis, the Brewster effect at different sea areas is further analyzed. The producing mechanism and changing rules of ocean surface Brewster effect are summarized and analyzed.