Pre Stack Time Migration ( PSTM)
PT. GIS offers three amplitude-preserving, pre-stack time migration algorithms, although Kirchhoff is the preferred method. Kirchhoff Migration is used as the main imaging method for time processing. It is a full featured time-domain migration with a selection of anti-alias options, amplitude compensation, and curved ray capability that images dips up to 90 degrees. In addition, the migration can be relative to a constant datum or topography and may be used in areas with significant lateral velocity variation.