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在野外地震采集数据的区域,由于有工业电线,导致地震记录存在着大量50Hz的单频噪声。互相关函数是确定单频干扰噪声频率重要手段。以相关原理为基础,提出分步搜索的快速算法得到高精度干扰频率。合成数据得出频率估算精度达到0.001Hz能达到较好压制效果。理论试算和实际地震资料处理结果表明该方法是有效和可行的。
In areas where field seismic data were collected, there was a large amount of single-frequency noise of 50 Hz due to industrial wires in seismic records. The cross-correlation function is an important means to determine the single-frequency interference noise frequency. Based on the relevant principle, a fast algorithm of step search is proposed to obtain high-precision interference frequency. Synthetic data show that the frequency accuracy of 0.001Hz can achieve better suppression effect. Theoretical trial calculation and actual seismic data processing results show that the method is effective and feasible.