A geoacoustic bottom interaction model (GABIM)
A geoacoustic bottom interaction model (GABIM)
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DOI：
10.1109/joe.2010.2050170
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发表时间：
2010-07
影响因子：
4.1
通讯作者：
D. Jackson;R. Odom;M. L. Boyd;A. Ivakin
中科院分区：
文献类型：
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作者：
D. Jackson;R. Odom;M. L. Boyd;A. Ivakin
地声海底相互作用模型（GABIM）已开发应用于低频和中频范围（100 Hz至10 kHz）。它产生的值的底部后向散射强度和分层海底的底部损失。首先定义了模型的输入参数，然后讨论了零阶非随机问题。标准代码用于获得底部损失，散射不校正，并作为计算散射的第一步。界面散射的内核采用基尔霍夫近似，一阶微扰理论，非常粗糙的海底经验表达式的组合。沉积物体积散射的核可以选择为经验核或物理核，后者基于一阶微扰理论。提供的例子来说明各种散射内核，并显示分层海底的完整模型预测的行为。最后对模型的改进和推广提出了建议。
The geoacoustic bottom interaction model (GABIM) has been developed for application over the low-frequency and midfrequency range (100 Hz to 10 kHz). It yields values for bottom backscattering strength and bottom loss for stratified seafloors. The model input parameters are first defined, after which the zeroth-order, nonrandom problem is discussed. Standard codes are used to obtain bottom loss, uncorrected for scattering, and as the first step in computation of scattering. The kernel for interface scattering employs a combination of the Kirchhoff approximation, first-order perturbation theory, and an empirical expression for very rough seafloors. The kernel for sediment volume scattering can be chosen as empirical or physical, the latter based on first-order perturbation theory. Examples are provided to illustrate the various scattering kernels and to show the behavior predicted by the full model for layered seafloors. Suggestions are made for improvements and generalizations of the model.