Wave field continuation can remove much of the energy which propagates along the surface, such as direct waves, ground roll and some random noises.
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。
Effective suppression of ground roll is vital to converted wave seismic data processing, but the methods of suppressing ground roll, as linear noise is usually dissatisfactory.
转换波资料的信噪比较低，有效信号往往被面波干扰淹没，因此需要对面波进行压制，但是将面波作为线性干扰的压制方法很难得到好的效果。
Effective suppression of ground roll is vital to converted wave seismic data processing, but the methods of suppressing ground roll, as linear noise is usually dissatisfactory.
转换波资料的信噪比较低，有效信号往往被面波干扰淹没，因此需要对面波进行压制，但是将面波作为线性干扰的压制方法很难得到好的效果。
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