Illumination, resolution, and image quality of PP - and PS -waves for survey planning

In the past, survey planning was based mainly on analysis of the acquisition geometry at the surface assuming a symmetric raypath between source and receiver. CMP fold and offset distribution maps were used to compare alternate acquisition geometries. When sources and receivers are at different depths (e.g., for OBS surveys) or when converted waves are considered, this assumption no longer holds, even in a horizontally layered subsurface.