泾阳台数字地磁信号的干扰分析及去噪处理

Interference Analysis and Denoising of Magnetic Signal in Jingyang Station

地磁观测易受外界环境干扰影响,有时干扰甚至能大过真实的地磁信号本身。针对泾阳台数字地磁观测存在的脉冲和毛刺等干扰,采用小波变换的模极大值法进行了降噪处理,结果显示处理后的信号保留了地磁信号特征,提高了地磁信号信噪比,表明小波方法抑制干扰效果明显。

This paper analysed pulses, glitches and interference of digital geomagnetic observation data recorded by Jingyang station, and processed data for noise reduction by using wavelet transform modulus maxima method. The results show that the geomagnetic signal characteristics of the processed data can be retained, and signal to noise ratio are improved. So wavelet transform method has an inhibitory effect on interference.