摘要
在地电场和电阻率同场地观测的台站,地电场观测必然会受到地电阻率观测人工供电的干扰,尤其是当地电场观测的采样率提高到1次/s以上时,这种干扰更是无可避免,而且不易消除。该文阐述了应用自适应噪声消除器对受种干扰的地电场观测数据进行处理,消除观测数据中的干扰噪声,从而获得地电场真实信号波形。对实际观测数据的处理结果表明,采用此方法可以很好的消除秒采样地电场观测数据中地电阻率供电产生的干扰。这种方法还可用于消除其他观测方法中存在的有规律的干扰。
At the same observation site, telluric observation will be interfered by the electric current in measuring the apparent resistivity, which appears in the waveform of square impulse, especially when the sampling rate is 1 sampling/second in telluric observation. The interference can not be easily removed. This paper introduced how to use the so-called ＂Adaptive Self Noise Canceller＂ in the digital signal processing to deal with telluric data with this kind of interference. The numerical modeling and actual data processing indicate that this method is promising in getting rid of the interference with greatly increasing the signal-to-noise ratio in the telluric data analysis.
出处
《地震》
CSCD
北大核心
2006年第1期87-92,共6页
Earthquake
关键词
地电场
地电阻率
供电干扰
自适应噪声消除器
Telluric field
Apparent resistivity
Interference from current
Adaptive SelfNoise Canceller
