轨道运动对BiSAR海浪成像的影响  

Effect of orbit motion for BiSAR imaging of ocean waves

作　　者：杨永红[1] 林明[1] 陆南[1] 

机构地区：[1]江苏科技大学电子与信息学院,江苏镇江212003

出　　处：《海洋通报》2010年第6期613-616,共4页Marine Science Bulletin

摘　　要：速度聚束调制是研究BiSAR海浪成像机理的一个重要方面,而海浪的轨道运动是速度聚束调制产生的根源。在平飞非等速情况下,本文以单色波为例,建立了含有轨道速度和加速度扰动的海面回波模型,推导了BiSAR海浪图像强度的表达式。当收发平台取适当的参数时,数值计算表明BiSAR是可以对一定条件下的海浪成像,并比较了单站SAR和双站SAR海浪图像的异同点。Velocity bunching modulation embodies one main aspect of BiSAR-ocean imaging mechanisms,while orbital motion of ocean waves is the source of velocity bunching modulation.For parallel mode and non-equal velocities of BiSAR systems,the model of echo signal with respect to monochromatic waves is developed,which includes the perturbations of orbital velocity and acceleration of ocean waves;the formula of BiSAR image intensity for ocean waves is derived.Via numerical method,ocean waves can be seen by BiSAR systems in the case of the proper parameters of receiving and transmitting platform and it can describe the similarities and differences of ocean waves of monostatic SAR and bistatic SAR.

关 键 词：双站SAR 速度聚束调制 海浪 

分 类 号：P714.3[天文地球—海洋科学] TN958[电子电信—信号与信息处理]