Identification of oil spill based on Stokes vector
In this paper,the models of sea surface and oil slick are established by using JANSWAP spectrum.The scattering of sea surface and oil slick is analyzed using Kirchhoff approximation theory.The Stokes vectors of scattered lights in hemispheric space are numerically calculated when S-polarized light,P-polarized light,45°-polarized light and circular polarized light are incident on the sea surface and oil slick respectively.The effect of incidence angle and wind speed on the V compo-nent of the scattered Stokes vector is analyzed.It is found that the V component of the scattered light from the sea surface and oil slick is significantly different,when P-polarized light and 45°-polarized light are incident at the Brewster's angle(56°)of oil slick,and the higher the wind speed,the more obvious it is.For the sea surface,the V component is approximately 0.For the oil slick,the scattered V component of P-polarized light forms a two-petal antisymmetric distribution on both sides of the incident plane,and the scattered V component of 45°-polarized light forms a two-petal antisymmetric distribution on both sides of the reflected light direction in the incident plane.It indicates the V com-ponent difference can be used to identify seawater and oil slick.The results can provide a theoretical reference for oil spill detection.
万方数据
维普
