Considering the properties of low stack folds, shallow objected layers and big background noise of shallow seismic data, the parameters selection for velocity analysis is studied in the paper.

针对浅层地震资料目的层较浅、叠加次数少和城市背景干扰大等特点，文中对速度分析的参数选取问题进行了研究。

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Then the trace gather undergoes velocity analysis, normal moveout correction and stack to bring seismic migrated section ( This is called scattering point imaging).

然后对该道集进行速度分析、动校正和叠加，得到偏移地震剖面，即共散射点成像。

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