Ocean acoustic tomography
Ocean acoustic tomography
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DOI：
10.1088/1742-6596/118/1/012002
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发表时间：
1988-07
期刊：
影响因子：
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通讯作者：
B. Cornuelle;P. Worcester;M. Dzieciuch
中科院分区：
文献类型：
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作者：
B. Cornuelle;P. Worcester;M. Dzieciuch
海洋声学层析成像（OAT）是由Munk和Wunsch（1979）提出的一种利用声波传播对海洋进行观测的方法。虽然海洋对大多数电磁辐射几乎是不透明的，但声波传播良好，并且低频（小于100 Hz）可以有效地传播超过10兆米（Munk，Worcester和Wunsch，1995）。选择“断层摄影”一词是为了突出与医学计算机轴向断层摄影的相似性，尽管由于海洋仪器和获取费用昂贵，OAT中可用的数据数量远远少于医学应用。因此，重建未知领域的关键取决于利用所有信息，包括对数据和未知数的一阶和二阶矩统计数据的事先猜测，以及在某些情况下，海洋的动力学模型。
Ocean acoustic tomography (OAT) is a method proposed by Munk and Wunsch (1979) to observe the ocean using acoustic transmissions. Although the ocean is nearly opaque to most electromagnetic radiation, acoustic waves propagate well, and low frequencies (less than 100 Hz) can propagate usefully for more than 10 megameters (Munk, Worcester, and Wunsch, 1995). The term "tomography" was chosen to highlight the analogy to medical computed axial tomography (CAT), although because ocean instrumentation and access are expensive, the number of data available in OAT has been far smaller than in medical applications. For this reason, the reconstruction of the unknown field depends critically on utilizing all information, including prior guesses of first and second moment statistics of the data and unknowns and, in some cases, dynamical models of the ocean.