摘要
从Howell深水无表面流情况下的二阶窄波束雷达截面方程出发,提出了一种变换积分对象、不等分积分区间构成稀疏矩阵方程来反演无向浪高谱的新算法.在不同信噪比和不同海况条件下进行数值仿真,当信噪比高于35dB时,该算法有较高的反演精度.并将该方法应用于“高频地波雷达现场对比验证试验”,反演结果与观测船输出结果比较,有效浪高的平均绝对误差为0.32m,并与Barrick法和Howell法进行了比较.模拟结果和实测结果都表明该反演算法的正确性和可行性.
Based on the per unit area second-order cross section spectrum of the ocean proposed by Howell, a new algorithm to extract ocean wave information from HF radar backscatter by a narrow-beam antenna system is presented,in which the integral object is changed and the integral range is divided asymmetrically. Numerical simulation is performed under condition of different SNR and sea state. The simulation result shows that this algorithm has preferable precision under SNR higher than 35dB. As a further test of this algorithm ,comparison are made between wave height estimates obtained from wave instrument and a HF ground wave radar at 7.7MHz, using data collected during ＂The HF ground radar field contrast test＂. The average absolute error of the significant wave height is 0.32m, which demonstrates the basic accuracy and feasibility of the inversion algorithm.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2006年第9期1729-1733,共5页
Acta Electronica Sinica
基金
国家高技术研究发展计划(863计划)远程高频地波雷达监测技术课题(No.2001AA631050)
关键词
高频地波雷达
二阶截面方程
无向浪高谱
稀疏矩阵
有效浪高
high frequency ground wave radar
second-order cross section equation
non-direction wave height spectrum
sparse matrix
significant wave height
