沿层中值滤波在消除深拖浅地层剖面电干扰中的应用

The Application of Layer-based Median Filtering Method to Eliminate Electrical Noise in Deep-Tow Shallow Stratigraphic Profile

声学定位系统的充电会在深拖搭载的浅地层剖面上造成竖条形噪声,严重影响海底地层资料的处理与解释。本文分析了上述电噪声信号特征,采用了中值滤波方法,对其进行了处理。文中设计了水平和沿层位两种不同窗口进行滤波,并改变窗口长度进行了滤波效果比较。实验结果表明,沿层位窗口可以更好地消除噪声并实现信号保真。

The charging of the acoustic position system can cause vertical bar-shaped noise in shallow stratigraphic profile of Deep-Tow detection,seriously affecting the seabed strata data processing and interpretation.This paper analyzed the noise＇s characteristics and dealt with the data by median filtering.The horizontal and layer-based filtering window to filter the noise is designed,and the window length to compare the filter effect is adjusted.Experimental results show that layer-based filter window can eliminate noise and protect the useful signal better.