Abstract
Back scattering of ocean surface is investigated by considering the foams coverage on its surface. Firstly, by adopting modified two-scale mode and the vector radiative transfer theory, zero and first order scattering coefficients are obtained by solving VRT equations. Then, MIE theory is used to get the scattering from foams, and fraction of foams coverage is analyzed by changing parameters of wind speed and temperature difference of ocean-air. Finally, the modified two-scale model and algorithms are verified by comparing its results with measured results, and simulations of calculating back scattering from ocean surface with and without foams are carried out. The conclusion is obtained that wind speed has different influence on back scattering under different incident angles.
Highlights
In natural world, the ocean surface will be partly covered by foams when the wind speed above the ocean reaches a certain extent
Jin investigated the EM scattering characteristic of ocean covered by foams firstly by combing vector radiative transfer theory (VRT) and two-scale model[2]
The modified two-scale model, the vector radiative transfer theory,and MIE theory are adopted to analyze the EM scattering from ocean surface covered by foams
Summary
The ocean surface will be partly covered by foams when the wind speed above the ocean reaches a certain extent. One third of the ocean surface will be covered by foams as the wind speed is 25m/s. Ocean surface scattering and foams particle volume scattering must be considered both in order to get the accurate calculation results,when the ocean scattering characteristic is analyzed. Manahan treated ocean foams as water-air bubbles, instead of sphere water partical in his research [1].Y.Q. Jin investigated the EM scattering characteristic of ocean covered by foams firstly by combing vector radiative transfer theory (VRT) and two-scale model[2]. The modified two-scale model, the vector radiative transfer theory,and MIE theory are adopted to analyze the EM scattering from ocean surface covered by foams
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