地震时间剖面的数字偏移程序不但要有较好的偏移效果，还要求运算速度快，否则其应用要受到限制。
For the digital migration program of time section, it is required not only the better results but also the high speed of calculation, or its application will surely be restricted.
用P 波方程编制的偏移程序VSP MIG 既可用于地面资料的偏移，也可用于井中资料的偏移；
The migration program VSP MIG that was developed using P-wave equation may be used to mig- rate both surface seismic data and VSP data.
做这件事的办法之一是对jfs_mount . o文件使用objdump实用程序，然后查看偏移地址3c。
One way you can do this is to use the objdump utility on the jfs_mount.o file and look at offset 3c.
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