微波多谱勒雷达海洋破碎波检测算法  

Ocean Breaking Wave Detection with Microwave Doppler Radar

作　　者：范林刚[1] 陈曦[1] 陈泽宗[1] 金燕[1] 

机构地区：[1]武汉大学电子信息学院,武汉市八一路299号430072

出　　处：《武汉大学学报（信息科学版）》2013年第8期998-1002,共5页Geomatics and Information Science of Wuhan University

基　　金：国家海洋公益性行业科研专项资助项目(201205032);国家863计划资助项目(2006AA09A303);国家自然科学基金资助项目(40976105);中央高校基本科研业务费专项资金资助项目

摘　　要：利用多谱勒谱参数检测破碎海浪,提出了一种基于稳态海浪谱模型的判决门限获取方法。利用判决门限获知多谱勒谱对应的海浪是否发生破碎,从而得到海洋中破碎发生的时间和位置。实测数据表明,检测结果与传统碎波统计方法建立的破碎库高度一致。将检测结果应用于海浪参数提取算法,对破碎发生位置提取的海浪参数进行算法修正后,得到的有效浪高和平均海浪周期的误差明显下降,进一步验证了此检测算法的可靠性。Specular scattering, which accompanies ocean breaking waves, provides the Doppler spectrum with more power, a wider bandwidth and a larger peak frequency. These Doppler features are used to detect breaking waves, and an algorithm is proposed to obtain the decision thresholds for three parameters. Breaking Doppler spectra as well as breaking positions can be obtained by the thresholds. Detection results agree well with the breaking positions obtained by visual observation. Furthermore, the results are conducted to improve the reversion of ocean wave parameters. Errors and variances of significant wave height and mean period both drop. This allow the conclusion that this algorithm is a promising method for detecting breaking waves for coherent microwave radar.

关 键 词：雷达信号处理 多谱勒谱 破碎波 检测 海浪 

分 类 号：P237.9[天文地球—摄影测量与遥感]