True-amplitude wavefield separation using staggered-grid interpolation in the wavenumber domain

A new scheme of wavefield decomposed elastic least-squares reverse time migration

“…The third wavefield decomposition method, which with clear physical significance and higher accuracy, is the wavefields decomposition in the wavenumber domain (Zhang and McMechan, 2010;Du et al, 2014;Zhang et al, 2020), the output decomposed P-and S-wavefields have the same amplitude, phase, and physical units as the input wavefields even in the case of inaccurate migration velocity. However, methods in the wavenumber domain suffer from expensive computation.…”