Consider the inverse acoustic scattering of time-harmonic point sources by a locally perturbed interface with buried obstacles in the lower half-space. A novel version of the sampling method is proposed to simultaneously reconstruct the local perturbation of the rough interface and buried obstacles by constructing a modified near-field equation associated with a special rough surface, yielding a fast imaging algorithm. Numerical examples are presented to illustrate the effectiveness of the inversion algorithm. 

　　Publication: 

　　Journal of Computational Physics. Volume 464, 1 September 2022, 111338 

　　Author: 

　　Jianliang Li 

　　School of Mathematics and Statistics, Yunnan University, Kunming 650091, China 

　　Jiaqing Yang 

　　School of Mathematics and Statistics, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China 

　　Bo Zhang 

　　LSEC and Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing 100190, China 

　　School of Mathematical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China 

　　Email: b.zhang@amt.ac.cn