一个等高线图，显示了两个地震同相轴或反射层之间的时间变化。
A contour map that displays the variation in time between two seismic events or reflections.
在不连续的、发散的反射同相轴或不相干的数据区域，画一个假想层可以帮助解释员作出更合适的解释。
In areas of discontinuous, divergent reflectors or incoherent data, drawing phantoms allows the interpreter to generate a map on a discontinuous event.
若使共中心点道集内的反射同相轴校平后能够同相叠加， 叠加速度则会出现一些低或高的异常。
In order to in-phase stack of aligned reflection events on CMP gathers, the stack velocities may have some higher or lower anomalies.
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