 % Both migration and modeling use phase-shift plus interpolation (PSPI) technique \longcite{gazdag:124}.

%\subsection{Marmousi}
%Marmousi data are composed of 240 shots and 256 frequencies. In all migrations we used the correct velocity and computed 33 subsurface offsets ranging from -400 m to 400 m. The reference velocities were computed by the Lloyd's method \cite{clapp:981}. For comparison, Figure~\ref{fig:Marmsp} shows the shot-profile migration of non-encoded shots using a migration aperture of 7500 m. The left panel corresponds to the zero-subsurface offset section and the right panel is the subsurface offset gather taken at the x-position indicated by the vertical line in the zero-subsurface offset section.

%\plot{Marmsp}{width=4in}{Shot profile migration using PSPI of Marmousi.}
%\par
%For the random phase encoding examples, we migrated groups of four encoded shots. Data were encoded in both frequency and shot dimensions using conventional random codes and Gold codes. Figure~\ref{fig:Marmr4} shows the migration of groups of four conventional randomly encoded shots. Figure~\ref{fig:Marmg4} shows the migration of groups of four encoded shots using Gold codes. Figure \ref{fig:Marmsa} shows the migration of the encoded data using the optimized codes.

%\plot{Marmr4}{width=4in}{Migration of randomly phase encoded groups of four neighboring shots using conventional random codes.}
%\plot{Marmg4}{width=4in}{Migration of randomly phase encoded groups of four neighboring shots using Gold codes.}
%\plot{Marmsa}{width=4in}{Migration of randomly phase encoded groups of four neighboring shots using phases from simulated annealing.}

%The difference sections between the shot profile migration and the conventional random phase encoding migration, Gold code phase encoding migration and optimized phase encoding migration are shown in Figures \ref{fig:Marmdifr4}, \ref{fig:Marmdifg4} and \ref{fig:Marmdifsa}, respectively. These figures are displayed with the same clip of the migrated images. Again, no obvious advantage of one encoding method over the other can be highlighted. 

%\plot{Marmdifr4}{width=4in}{Difference between shot profile migration and migration of randomly phase encoded groups of four neighboring shots using conventional random codes.}
%\plot{Marmdifg4}{width=4in}{Difference between shot profile migration and migration of randomly phase encoded groups of four neighboring shots using Gold codes.}
%\plot{Marmdifsa}{width=4in}{Difference between shot profile migration and migration of randomly phase encoded groups of four neighboring shots using phases from simulated annealing.}

%\subsection{Prestack exploding reflector modeling of intersecting reflectors}
