Deriving a Fast P/S Decoupled Operator From 3-D Anisotropic Christoffel Equation With Its Application in Elastic Reverse Time Migration and Angle-Domain Common-Image Gathers. - Lele Zhang; Yang Zhao 043; Lu Liu; Houzhu Zhang; Ke Chen; Jiahui Zuo; Yixin Wang; Fuyu Zhu; Shichang Li (IEEE Trans. Geosci. Remote. Sens., 2023)