We can demonstrate that the stacking velocity varies with line azimuth in the form of ellipse, and that the ratio of short axis to long axis is equal to the cosine of the apparent dip angle, the long axis indicating the apparent dip of formation.

• 可以证明,叠加速度随方位角呈椭固状变化,椭圆的短、长轴之比为视倾角的余弦,椭圆的走向为地层的视倾向方向。