把波场沿深度外推可以消除与地表有关的“噪音” ，如直达波、面波、声波及在表层传播的随机噪音。

Wave field continuation can remove much of the energy which propagates along the surface, such as direct waves, ground roll and some random noises.

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该方法极大地提高了在高强度直达波干扰下主动声呐提取目标回波的精度。

This method is greatly increased in the high-intensity direct wave interference under active sonar echo extraction accuracy.

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