Roux Philippe, Cornuelle Bruce D, Kuperman W A, Hodgkiss W S
LGIT, Universite Joseph Fourier, CNRS UMR 5559, Grenoble, France.
J Acoust Soc Am. 2008 Dec;124(6):3430-9. doi: 10.1121/1.2996330.
Acoustic remote sensing of the oceans requires a detailed understanding of the acoustic forward problem. The results of a shallow-water transmission experiment between a vertical array of sources and a vertical array of receivers are reported. The source array is used to provide additional degrees of freedom to isolate and track raylike arrivals by beamforming over both source and receiver arrays. The coordinated source-receiver array processing procedure is presented and its effectiveness in an example of tracking raylike arrivals in a fluctuating ocean environment is shown. Many of these arrivals can be tracked over an hour or more and show slowly varying amplitude and phase. The use of a double-beamforming algorithm lays the foundation for shallow-water acoustic remote sensing using travel time and source and receive angles of selected eigenrays.
海洋声学遥感需要对声学正问题有详细的了解。本文报道了在垂直源阵列和垂直接收器阵列之间进行的浅水传播实验结果。源阵列用于提供额外的自由度，以便通过对源阵列和接收器阵列进行波束形成来分离和跟踪类射线波至。文中介绍了源-接收器阵列协同处理程序，并展示了其在波动海洋环境中跟踪类射线波至的一个示例中的有效性。其中许多波至可以被跟踪一个小时或更长时间，并显示出缓慢变化的幅度和相位。双波束形成算法的使用为利用选定本征射线的传播时间以及源和接收角度进行浅水声学遥感奠定了基础。
