We present a partial prestack migration operator for converted wave, the PS-AMO operator. This operator is a cascade operator of PS-DMO and inverse PS-DMO. We implement the PS-AMO operator in the log-stretch frequency-wavenumber domain.
Our operator is able to handle the amplitudes correctly, since it uses an accurate PS-DMO operator for this purpose. The PS-AMO operator is velocity dependent, and we assume constant velocity. Therefore, the velocity in the new position is the same as the velocity in the previous position.
The PS-AMO operator transforms data to an arbitrary offset and azimuth. This transformation also considers the CCP binning transformation characteristic of PS data. Therefore, a priori CCP binning is not necessary before applying azimuth moveout to converted wave data.
Our operator can be applied to the regularization of OBS data, where the knowledge of our seismic image is of crucial importance. This is the next step in our project.