航海雷达表面电流测量归一化标量积法的改进

Weimin Huang, E. Gill, Zhifeng Zhong
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引用次数: 4

摘要

提出了一种改进归一化标量积法(NSP)从x波段航海雷达图像序列中提取海流的算法。在NSP方法中,需要在适当的当前速度范围内以适当的分辨率进行二维搜索,以确定使归一化标量积最大化的速度。如果搜索范围很广或需要高分辨率,则搜索可能需要很长时间。为了减少计算量,该算法采用可变范围和分辨率代替固定范围和分辨率。为了验证算法的内部一致性,给出了不同流速下的模拟反演结果。实验结果表明,该算法在获得较高精度的同时,显著缩短了搜索时间。利用加拿大东海岸的真实雷达数据对算法的性能进行了验证。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Enhancement of the normalized scalar product method for surface current measurement using nautical radar
An algorithm to improve the normalized scalar product (NSP) method of extracting sea surface currents from X-band nautical radar image sequences is presented. In the NSP method, two-dimensional searching over a suitable range of current velocities with an appropriate resolution is required to determine the velocity that maximizes the normalized scalar product. The search may take an extremely long time if the range is wide or a high resolution is sought. In order to reduce the computation involved in the procedure, the proposed algorithm uses variable ranges and resolutions instead of fixed ones. Simulated inversion results for a variety of current velocities are obtained in order to check the internal consistency of the algorithm. With this algorithm, it is observed that the search time can be reduced significantly while obtaining high precision. The performance of the algorithm is also validated using real radar data collected on the east coast of Canada.
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