Forward modeling method of refraction first-break in lateral varying velocity media. For layered media, a new forward modeling method of refraction is presented.
二维复杂层状介质地震折射波正演方法，该方法可适用于折射面起伏不大、低速层和折射层速度变化不大的情况。
When the absorption is weak, the lateral shift for the composites with positive refraction will exhibit a positive displacement.
而当介质的吸收较弱时，正折射材料表面的古斯-汉欣位移才会出现正位移。
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