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本文给出一种适用于叠前数据速度分析和叠前深度偏移的快速射线追踪方法──微变网格法；该方法不仅精度高，而且计算速度极快，可适用于当前计算条件下的地球介质速度反演和叠前深度偏移成像的要求．
This paper presents a fast ray tracing method suitable for prestack data velocity analysis and prestack depth migration──Magilinear mesh method. This method not only has high precision and fast calculation speed, but also is suitable for the current calculation conditions The Earth’s medium velocity inversion and prestack depth migration imaging requirements.