Acoustic inversions from an explosive source of opportunity in the ASIAEX2001-SCS experiment

Proceedings of the 2004 International Symposium on Underwater Technology (IEEE Cat. No.04EX869) Pub Date : 2004-04-20 DOI:10.1109/UT.2004.1405566

Ying-Tsong Lin, Chi-Fang Chen, J. Lynch, N. Chotiros, A. Newhall, A. Turgut, S. Schock, C. Chiu

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Abstract

Acoustic inversions including source localization and geoacoustic inversion from an unexpected explosion in the ASIAEX2001-SCS experiment is presented. Horizontal beamforming is performed to find the source azimuthal direction and the water wave part of the modal dispersion curve is used to find the source range. The relation of the source depth and the charge weight has been obtained from the bubble pulse period. The localization result shows that the detonation occurred in the direction of east-north east and about 30 km distant from the receiver. To perform the bottom inverse, we use a broadband linear inverse technique employing the modal group velocity, which is inferred from the modal arrival time and source range. In the end, a four-layered bottom model is created, which is consistent with both our explosion data and independent source tow data. The resolution and variance of the estimate are also presented. In conclusion, this bottom model should be widely applicable for modeling broadband sound propagation in the ASIAEX2001-SCS experiment site.

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ASIAEX2001-SCS实验中爆炸机会源的声学反演

介绍了ASIAEX2001-SCS实验中震源定位和意外爆炸的地球声反演。利用水平波束形成来确定源的方位方向，利用模态色散曲线的水波部分来确定源的距离。从气泡脉冲周期得到了源深度与电荷量的关系。定位结果表明，爆炸发生在东-北-东方向，距离接收机约30 km。为了进行底部逆，我们使用宽带线性逆技术，利用模态群速度，这是从模态到达时间和源范围推断出来的。最后，建立了一个四层的底部模型，该模型既符合我们的爆炸数据，也符合独立源数据。给出了估计的分辨率和方差。综上所述，该底部模型可广泛应用于ASIAEX2001-SCS实验场地的宽带声传播建模。

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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Proceedings of the 2004 International Symposium on Underwater Technology (IEEE Cat. No.04EX869)

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