基于流函数模型的矢量海流生成方法  

Algorithm for Vector Current Measurements Based on Stream Function Mothod

作　　者：刘蕾[1] 吴雄斌[1] 程丰[1] 

机构地区：[1]武汉大学电子信息学院,湖北武汉430072

出　　处：《武汉大学学报（理学版）》2006年第3期366-370,共5页Journal of Wuhan University:Natural Science Edition

基　　金：国家自然科学基金资助项目(60201003;40406020)

摘　　要：提出了一种基于海洋流函数模型的双站高频地波雷达径向流生成矢量流算法.该算法避免了传统矢量合成法将径向流进行插值带来的误差,而且符合海洋动力学原理,生成的流场更接近实际分布.通过计算机仿真发现,流函数算法的容错、容差能力比矢量合成法更强.在径向流探测标准误差为10 cm.s-1时,新算法反演结果的均方根误差减小了约5 cm.s-1.应用到雷达实测数据中,与海流计实测结果比较表明,新算法比传统算法的平均误差减小了2 cm.s-1.A new algorithm stream function method （SFM）, engendering vector currents from radial currents mapped by two HF Radar sites detection is provided. SFM is based on some oceanographic assumptions. Compared with the common vector combination method （VCM）, vector currents field is obtained using some numerical techniques such as Taylor expansion and least-squares method to avoid the error caused by linear interpolation. The simulation experiments show that SFM has better radial error ac ceptance and more robust in processing the complicated current field. In addition, SFM derived currents cover a larger area. The new method is applied on HFSWR （HF surface wave radar） OSMAR test data. Comparison with the current meter in-situ measurements shows that the RMS difference of SFM-derived results is 2 cm·s^-1 less than VCM derived results.

关 键 词：高频地波雷达 海洋表面流 双站 流函数算法 

分 类 号：TN957.52[电子电信—信号与信息处理]