卫星合成孔径雷达探测海底地形研究进展

发布时间：2018-11-02 10:19

【摘要】：利用卫星合成孔径雷达(SAR)图像信息探测海底地形是海洋遥感物理学和海洋动力学研究具有挑战性的问题,这是因为根据电磁波传播原理,雷达脉冲没有能力穿透海水,因而不可能直接探测到海底地形特征,可是,许多卫星SAR图像上确实显示出海底地形特征。这些海底地形不仅分布在水深小于100m的浅海,而且在600~800m甚至2 000~3 000m的深海区也有发现。本文概略介绍该领域的发展前沿和研究进展,主要内容包括海面过程雷达成像基本理论,我国辽东浅滩、台湾滩以及美国东部湾流海域等3个海区海底地形特征SAR成像理论:分别为速度切变流纵向流经平行海底地形、层化流体横向流流经平行(周期性)海底地形和强海流流经孤立海底地形。据此建立的理论和分析方法可做为研究更复杂情况和探索新应用领域的基础和出发点。
[Abstract]:Using satellite synthetic aperture radar (SAR) images to detect seabed topography is a challenging problem in marine remote sensing physics and marine dynamics, because radar pulses are not capable of penetrating seawater according to the principle of electromagnetic wave propagation. Therefore, it is impossible to detect submarine topographic features directly, but many satellite SAR images do show submarine topographic features. These seafloor topography are not only distributed in shallow sea with water depth less than 100 m, but also in the deep sea area of 600m 800 m or even 2 000 m 3 000 m. This paper briefly introduces the development frontier and research progress in this field. The main contents include the basic theory of sea surface process radar imaging, the shallow shoals in Liaodong, China. SAR imaging theory of submarine topography in Taiwan beach and the eastern Gulf Stream of the United States: velocity shear flow longitudinal flow through parallel seabed topography, Horizontal flow of stratified fluid flows through parallel (periodic) seafloor topography and strong current flows through isolated seabed topography. The theory and analytical method can be used as the basis and starting point for studying more complex situations and exploring new application fields.
【作者单位】：美国马里兰大学大气海洋科学系;广东海洋大学广东省近海海洋变化与灾害预警重点实验室;
【基金】：美国国家科学基金项目——表面波对降雨的时空响应及其对雷达波特征的影响(092107) 中国国家自然科学基金项目——热带气旋对琼东上升流动力过程和物质输送的影响机制研究(41476009) 广东高等学校科技创新项目——粤西陆架海区湍流混合特征及其季节变化分析(2013KJCX0099)
【分类号】：P715.6

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