Calculating the waveguide invariant by passive sonar lofargram image

L. An, Zhi-qiang Wang, Ji-ren Lu
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引用次数: 11

Abstract

An image processing method for the calculation of waveguide invariant (beta) with passive sonar lofargram image is presented in this paper. Concise formula for calculating beta was then derived by finding the two-dimensional Fourier transform ridges of the lofargrarns. The algorithm was exercised for a Pekeris waveguide and a simulated shallow water waveguide containing thermoclines with source depth varying from 10 m to 90 m. It then was applied to a lofargram collected during an experiment at the South China Sea. The result of experimental data matched well to the simulations. The approach in this paper-differs from normal mode model algorithm by virtue of its incorporation of image processing methods. It thus avoids the potentially prohibitive computation and accurate estimation of environmental parameters.
利用被动声纳图像计算波导不变量
本文提出了一种利用被动声纳图像计算波导不变量(β)的图像处理方法。然后,通过寻找lofargrarns的二维傅里叶变换脊,推导出计算beta的简明公式。该算法在Pekeris波导和含温跃柱的模拟浅水波导中进行了验证,其源深度从10 m到90 m不等。然后将其应用于在南中国海进行的实验中收集的lofargram。实验数据与仿真结果吻合较好。本文的方法不同于常规模式模型算法,因为它结合了图像处理方法。因此,它避免了潜在的令人望而却步的计算和环境参数的准确估计。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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