It is shown that in the rnedlum where velocity varies laterally,conventional stack velocity is related to not only velocity and travel time at CMP butalso the second der1vative of velocity in lateral direction.

• 研究结果表明，在横向变速介质中，常规叠加速度不仅与共中心点处的速度及旅行时有关，而且还与速度沿横向的二阶导数有关。