利用VSP三分量记录压制噪音

NOISE ELIMINATION BY VSP THREE-COMPONENT RECORD

美国休斯敦大学

Department of Geosciences,University of Houston

众所周知,纵波信号和横波信号属线性极化波。反映在三分量记录上,在没有噪音的单一信号情况下,线性极化波的矢端分布应该是一条直线.由于噪音的存在,就会破坏矢端图的线分布状态。本方法的出发点是统计出波的偏振方向,把非线性分布的矢端图还原到线分布状态,从而达到压制噪音,提高信噪比的目的.从实际资料的处理效果看,这是一种行之有效的方法。

As is known to all geophysicists that the signals of P-wave and S-wave should go to the linear polarization. From 3-component record one can see in noise-free single signal circumstances, the hodograph distribution of linear polarization wave should present itself as a straight line. Due to the presence of noise,it may disrupt the linear distribution pattern of the hodograph. The recommmended technique is aimed at giving the polarization direction of wave and restore the hodograph of nonlinear distribution to its linear distribution pattern so as to eliminate noise as well as improve S/N natio. From practice,it is proved an effective measure in data processing.