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对炮检距为X的地震道作动校正就是将它变成在激发点处接收的记录道。只有这种零接收距的道才包含有反射系数(反射函数)的正确序列,所有別的道的反射函数都有畸变:在最简单的情况下反射函数的时间压缩得变短了,而在较复杂的情况下反射函数会有部分的翻转,这发生在当有几个反射同相轴相交时。用动校正重建真实的零接收距反射函数只能是近似的。在上述第一种情况下校正道的精度要比零接收距道减低。在第二种情况下有相交的双曲线,精确地重建零距道很明显是不可能的。这些问题用一些理论的和实际的例子进行了讨论。
Correcting a seismic trace offset at X is done by turning it into a track that is received at the firing point. Only this zero-reception track contains the correct sequence of reflection coefficients (reflection functions), and the distortion function of the reflection of all other paths is distorted: in the simplest case the reflection of the reflection function becomes shorter in time, In more complex cases, the reflection function is partially reversed, which occurs when there are several reflection events intersecting each other. Reconstructing a true zero-reception reflection function with motion correction can only be approximate. In the first case, the accuracy of the correction channel is lower than that of the zero reception path. In the second case, there is a hyperbolic intersection, and it is obviously impossible to reconstruct the zero-crossing accurately. These questions are discussed with some theoretical and practical examples.