Pspi: Streamlining 3D Echo-Reconstructive Imaging

Subsurface depth imaging� being as it is the outcome of repeated steps of �3D seismic data migration� requires Gbytes of data which must be reduced� transformed� visualized and interpreted to obtain meaningful information�. Severe performance requirements oblige high performance computing hardware and techniques� enormous effort has also historically gone into simplifying the migration model so as to reduce the cost of the operation while retaining the essential features of the signal propagation� One such model leads to the phase-shift-plus-interpolation �PSPI� algorithm� a high􀀀quality method for seismic migration� By optimizing the algorithm to reduce calculation requirements and exploiting its decoupling in the frequency domain for concurrency in parallel implementations� we have created in PSPI a cost-effective method�.