收稿日期: 2009-12-23
修回日期: 2010-02-09
网络出版日期: 2010-09-15
基金资助
国家自然科学基金重大项目(60890071)资助
Ocean surface specular-point scattering model based on the Gram-Charlier distribution
Received date: 2009-12-23
Revised date: 2010-02-09
Online published: 2010-09-15
根据海面镜面散射理论和海面斜率分布理论,将海面斜率的Gram-Charlier分布应用于海面镜面散射建模,建立了以海面上10m高度风速为基准的、基于Gram-Charlier分布的海面镜面散射模型的雷达后向散射截面的计算方法.通过与实测数据的比较,验证了基于Gram-Charlier分布的海面镜面散射模型的正确性和适用性.通过仿真研究,系统总结了在不同风速、风向、极化、波段、入射角、方位向等条件下海面镜面散射的变化规律,对实际应用具有指导作用.
关键词： 海面; 镜面散射; Gram-Charlier分布; 模型研究; 雷达遥感
王珂 , 洪峻 , 明峰 , 丁岩 . 基于Gram-Charlier分布的海面镜面散射模型[J]. 中国科学院大学学报, 2010 , 27(5) : 645 -650 . DOI: 10.7523/j.issn.2095-6134.2010.5.010
On the basis of the theories of the ocean surface specular-point scattering and slopes distribution and by applying the Gram-Charlier distribution of ocean surface slopes to make a model for the ocean surface specular-point scattering and taking wind speed at 10m above ocean surface as basis, we establish a calculation method for the radar backscattering cross-section of the ocean surface specular-point scattering model based on the Gram-Charlier distribution. By comparing with measured data, we verify accuracy and applicability of the ocean surface specular-point scattering model based on the Gram-Charlier distribution. By simulation study, we summarize the variety regulations of the ocean surface specular-point scattering systematically under different conditions that include wind speed, wind direction, polarization, wave band, angle of incidence, azimuth and so on, and have function of guiding practical application.
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