Consider the inverse acoustic scattering of time-harmonic point sources by an unbounded locally rough interface with bounded obstacles embedded in the lower half-space. A novel version of reverse time migration is proposed to reconstruct both the locally rough interface and the embedded obstacle. By a modified Helmholtz-Kirchhoff identity associated with a planar interface, we obtain a modified imaging functional which has been shown that it always peaks on the local perturbation of the interface and on the embedded obstacle. Numerical examples are presented to demonstrate the effectiveness of the method.

翻译：考虑一下时间- 调频点源的反声散射, 由不固定的局部粗糙界面与嵌入低半空的封闭障碍隔开。 为了重建本地粗糙界面和嵌入障碍, 提出了反向时间迁移的新版本 。 通过一个与平板界面相关的经修改的 Helmholtz- Kirchhoff 身份, 我们获得了一个经过修改的成像功能, 该功能已经显示它总是在界面的局部扰动和嵌入障碍上达到峰值。 提供了数字例子来显示该方法的有效性 。