It is difficult to locate CCP exactly due to the asymmetry of converted wave ray path and the de pendency of CCP on depth, offset, P-wave velocity, and S-wave velocity.

• 但由于转换波射线路径具有明显的不对称性，且转换点坐标是深度、炮检距、纵横波速度及倾角等多种因素的函数，使得CCP的定位十分困难。