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基于一阶海洋回波的HF-SAR提取表层海流性能分析

Performance Analysis of Surface Current Extraction by HF-SAR Based on First Order Sea Echo
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摘要 将合成孔径技术用于高频地波雷达,以实现单站提取表层海流,对于降低观测成本、提高效率具有重要意义。但现有的高频合成孔径雷达(HF-SAR)信号模型是基于理想点目标的,而未考虑海域分辨单元的Bragg散射效应。针对这一问题.基于一阶海洋回波理论,该文提出了用HF-SAR提取表层海流的改进的信号模型,并分析了Bragg散射对HF-SAR方位向回波的影响。然后针对方位向回波信号的特点,给出了相应的速度估计算法。最后通过蒙特卡洛仿真分析了HF-SAR对指定海域分辨单元的速度估计性能,结果显示对于流速和流向的估计精度能够满足工程应用的要求,这表明用HF-SAR提取表层海流是可行的。 It is important to apply synthetic aperture technique to High Frequency Surface Wave Radar (HFSWR), and thus to implement surface current extraction by a single site, for the sake of reducing observation cost and improving efficiency. However the existing signal model of High Frequency SAR (HF-SAR) is based on theoretic point targets, and therefore the Bragg scattering effect of sea resolution cells is not considered. To solve this problem, an improved signal model of surface current extraction by HF-SAR is presented based on first order sea echo, and the effect of Bragg scattering to the azimuth echo of HF-SAR is analyzed. Then a velocity estimation algorithm is designed according to the signal features of the azimuth echo. Finally the velocity estimation performance of HF-SAR is analyzed on a specified resolution cell by Monte Carlo simulation. Simulation results show that the estimation precision of velocity and direction meets the requirements of engineering application, which indicates that it is feasible to extract surface current by HF-SAR.
出处 《电子与信息学报》 EI CSCD 北大核心 2009年第2期382-385,共4页 Journal of Electronics & Information Technology
基金 国家863计划项目(2005AA635220)资助课题
关键词 高频合成孔径雷达 一阶海洋回波 速度估计 表层海流 High Frequency SAR (HF-SAR) First order sea echo Velocity estimation Surface current
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  • 1邱昌熔.海态监测分析雷达的计算机接口与回波信号处理软件[J].武汉大学学报(海洋探测专刊),1994,:25-31.
  • 2邱昌熔.海态监测分析雷达采样数据的整序及后续处理[J].武汉大学学报(海洋探测专刊),1994,:25-31.
  • 3吴世才.海态监测分析雷达由宽束天线测量回波到达角[J].武汉大学学报(海洋探测专刊),1994,:11-17.
  • 4文必洋.从海态监测分析雷达回波生成径向海流图[J].武汉大学学报(海洋探测专刊),1994,:129-133.
  • 5DIMITRISGM VINARYKI STEPHENMK 周正译.统计与自适应信号处理[M].北京:电子工业出版社,2003..
  • 6刘永坦,地波超视距对海探测雷达总体论证报告,1990年
  • 7盛骤,概率论与数理统计
  • 8陈宗镛,海洋科学概论
  • 9邱昌熔,武汉大学学报,1994年,海洋探测专刊,112页
  • 10邱昌熔,武汉大学学报,1994年,海洋探测专刊,25页

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