
%0 Journal Article
%A Sun, Weijia 
%A Fu, Li-Yun 
%A Zhou, Binzhong 
%T A robust scheme to output angle-domain common image gathers for shot-profile migration
%J ASEG Extended Abstracts
%D 2012/04/01
%V 2012
%N 1
%P 1-4
%K 
%R https://doi.org/10.1071/ASEG2012AB080
%U https://www.publish.csiro.au/paper/ASEG2012AB080 
%X Angle-domain common image gathers (CIGs) play an important role in migration-based velocity updating. One popular criterion of migration velocity analysis (MVA) is the flatness of common-angle image gathers. We first revisit the popular schemes of generating angle-domain CIGs by wavefield continuation migration. Then, we present an alternative approach to produce common angle image gathers. Our method, one of multiple-weight methods, is also for shot-profile migration based on one way wave equation. To avoid the stability problem of multiple-weight methods, our scheme is implemented in complex number domain for every frequency after imaging. The ability of anti-alias resulted from sparse shot geometry is investigated. Numerical examples show that our strategy is efficient, stable, and easy to implement. 
