In this chapter, I give an overview of the data used in this study and describe the processing steps applied to the data prior to AVO analysis. First I delineate the velocity analysis applied to the data and discuss the uncertainties both in RMS and interval velocity. I then outline the preprocessing steps of the data, the prestack time migration and succeeding amplitude calibration. The entire processing is performed in a way to preserve the true amplitude information of the data, which is essential for the subsequent AVO analysis and modeling.