Asymptotic Full Wave-Form Inversion in the Image Domain

This study considers the Full Waveform Inversion (FWI) method in the image domain based on the asymptotic solution of the Helmholtz equation. The paper provides ray tracing and beam migration to get the images used to compute the tomographic part of the asymptotic FWI gradient. The comparison of asymptotic FWI and Common Image Point (CIP) tomography show that the computational time for both methods is similar while they provide reconstruction of different model parts. A series of numerical experiments show that CIP tomography is effective in reconstructing the low frequency model, while asymptotic FWI provides recovery of the details of complex velocity structure.