In order to achieve good dynamic correction , we must do three-parameter velocity analysis,namely determination of three-parameter velocity informations of subsurface reflector: dip direction, dip angle and mean square-root velocity.

• 为了得到较好的动校正效果，必须进行三参量速度分析，确定地下反射界面的三参量速度信息，即倾向、倾角和均方根速度。