标题： 在桑地亚诺地下研究设施的地震地下阵列中的维纳滤波 显示英文标题

标题： Wiener filtering with a seismic underground array at the Sanford Underground Research Facility

摘要： 在南达科他州前霍姆斯塔克矿的桑福德地下研究设施部署了一个地震阵列，用于研究地下地震环境。这包括探索在地下建造第三代引力波探测器的优势。主要的噪声源将是牛顿噪声，这是由局部重力场波动引起的。希望结合低噪声地震环境和使用探测器附近地震仪进行相干噪声扣除，可以将牛顿噪声抑制到所需水平。在本文中，我们使用维纳滤波技术以海洋微震的形式扣除地震阵列中的相干噪声。我们在大约0.05-0.5赫兹之间实现了数量级以上的噪声消除。我们检查了维纳滤波器系数在一天内的变化，展示了本地活动如何影响滤波器。我们还研究了系数在一个月内的变化，展示了滤波器随时间的稳定性。最后，我们探讨了改变滤波器阶数对扣除性能的影响。结果表明，优化滤波器阶数可以显著提高扣除性能。 显示英文摘要

摘要： A seismic array has been deployed at the Sanford Underground Research Facility in the former Homestake mine, South Dakota, to study the underground seismic environment. This includes exploring the advantages of constructing a third-generation gravitational-wave detector underground. A major noise source would be Newtonian noise, which is induced by fluctuations in the local gravitational field. The hope is that a combination of a low-noise seismic environment and coherent noise subtraction using seismometers in the vicinity of the detector could suppress the Newtonian noise to required levels. In this paper, we use Wiener filtering techniques to subtract coherent noise in a seismic array in the form of oceanic microseisms. We achieve more than an order of magnitude noise cancellation between about 0.05-0.5 Hz. We examine the variation in the Wiener filter coefficients over the course of the day, showing how local activities impact the filter. We also study the variation in coefficients over the course of a month, showing the stability of the filter with time. We finally explore how varying the filter order affects the subtraction performance. It is shown that optimizing filter order can significantly improve subtraction performance.