Wiener filtering with a seismic underground array at the Sanford Underground Research Facility
Abstract
A seismic array has been deployed at the Sanford Underground Research Facility in the former Homestake mine, South Dakota, USA, to study the underground seismic environment. This includes exploring the advantages of constructing a third-generation gravitational-wave (GW) detector underground. A major noise source for these detectors would be Newtonian noise (NN), 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 NN to below the projected noise floor for future GW detectors. In this paper, certain properties of the NN subtraction problem are studied by applying similar techniques to data of a seismic array. We use Wiener filtering techniques to subtract coherent noise in a seismic array in the frequency band 0.05–1 Hz. This achieves more than an order of magnitude noise cancellation over a majority of this band. The variation in the Wiener-filter coefficients over the course of the day, including how local activities impact the filter, is analyzed. We also study the variation in coefficients over the course of a month, showing the stability of the filter with time. How varying the filter order affects the subtraction performance is also explored. It is shown that optimizing filter order can significantly improve subtraction of seismic noise.
Additional Information
© IOP Publishing Ltd. Received 25 May 2014, revised 14 July 2014; accepted for publication 14 August 2014; published 16 October 2014. MC was supported by the National Science Foundation Graduate Research Fellowship Program, under NSF grant number DGE 1144152. VD is a member of the LIGO Laboratory, supported by funding from United States National Science Foundation. NCʼs work was supported by NSF grant PHY-1204371. VM was supported by NSF grants PHY-0939669 and PHY-1344265. LIGO was constructed by the California Institute of Technology and Massachusetts Institute of Technology with funding from the National Science Foundation and operates under cooperative agreement PHY-0757058. This paper has been assigned LIGO document number LIGO-P1400042.Attached Files
Submitted - 1403.7756v3.pdf
Files
Name | Size | Download all |
---|---|---|
md5:44ccd39d98a9540265a5397c0b0ec011
|
1.4 MB | Preview Download |
Additional details
- Eprint ID
- 52580
- DOI
- 10.1088/0264-9381/31/21/215003
- Resolver ID
- CaltechAUTHORS:20141211-090353462
- NSF Graduate Research Fellowship
- DGE-1144152
- NSF
- PHY-1204371
- NSF
- PHY-0939669
- NSF
- PHY-1344265
- NSF
- PHY-0757058
- Created
-
2014-12-11Created from EPrint's datestamp field
- Updated
-
2022-07-12Created from EPrint's last_modified field
- Other Numbering System Name
- LIGO
- Other Numbering System Identifier
- LIGO-P1400042