Improved composite surface model for two-dimensional ocean surface scattering

Zhensen Wu; Yandong Zhang; Lixin Guo

doi:10.1117/12.411699

22 December 2000 Improved composite surface model for two-dimensional ocean surface scattering

Zhensen Wu, Yandong Zhang, Lixin Guo

Proceedings Volume 4172, Remote Sensing of the Ocean and Sea Ice 2000; (2000) https://doi.org/10.1117/12.411699
Event: Europto Remote Sensing, 2000, Barcelona, Spain

Abstract

A numerical study of scattering from 2D ocean-like surfaces is presented in this paper. Fist a new model for generating 2D fractal rough sea surface is introduced. This model incorprates the spectrum into fractal mode,, thus it can apply to any forms of sea spectrum. In this paper the Semi- Empirical Sea-Spectrum proposed by AK Fung is chosen for its simplicity. Afterwards, an improved composite surface model is developed to calculate the scattering coefficient. In this mode,, we calculate the value of slopes at each point of the large-scale roughness using numerical method, therefore avoid assuming the probability density distribution of slopes in the conventional composite surface mode. Afterwards, the ray-tracing method is adopted to predict the intensity of light scattered from rough sea surface, which helps to probe the sea surface's microstructure. Moreover, we make a study of the shadowing of each point on the surface by tracing the incident and scattered wave, and can get the ratio of the number of points unshadowed to the total number, i.e. the shadowing function. Finally an analysis of the amplitude characteristics and fractal characteristic of the scattered wave from sea surfaces is made, which are of great significance for distinguishing and detecting targets on the sea.

Citation Download Citation

Zhensen Wu, Yandong Zhang, and Lixin Guo "Improved composite surface model for two-dimensional ocean surface scattering", Proc. SPIE 4172, Remote Sensing of the Ocean and Sea Ice 2000, (22 December 2000); https://doi.org/10.1117/12.411699

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