Extended Supplement for De-noising distributed acoustic sensing data using an adaptive frequency-wavenumber filter

This electronical extended supplement presents an adaptive frequency-wavenumber filter suppresses the incoherent seismic noise while amplifying the coherent wave field in seismic distributed acoustic sensing (DAS) data. We analyse the response of the filter in time and spectral domain, and we demonstrate its performance on a noisy data set that was recorded in a vertical borehole observatory showing active and passive seismic phase arrivals. In these data we can suppress the noise up to 20 dB. This data publication serves as a repository for data an plotting scripts.

本电子补充材料介绍了一种自适应频率-波数滤波器，可在地震分布式声波传感（Distributed Acoustic Sensing，DAS）数据中压制非相干地震噪声，同时放大相干波场。我们分别在时域与谱域分析了该滤波器的响应特性，并在一套采自垂直井孔观测站的含噪数据集上验证了其性能，该数据集包含主动与被动地震震相到时信息。针对该数据集，本滤波器可实现最高20 dB的噪声压制。本数据集发布内容可作为原始数据与绘图脚本的存储库。