The velocity analysis accuracy may be raised by applying iterative stacking method and multiplying model trace stacking method to common-range gathers.

采用同炮检距道集进行迭代叠加和乘模型系数道叠加，可以提高速度分析的精度。

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For converted wave stacking and trace selection of common reflection point gathering, it is required to accurately calculate the location of conversion points.

转换波共转换点的叠加和道集选取都需要准确地计算转换点的位置。

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For converted wave stacking and trace selection of common reflection point gathering, it is required to accurately calculate the location of conversion points.

转换波共转换点的叠加和道集选取都需要准确地计算转换点的位置。

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