Rotation, Strain, and Translation Sensors Performance Tests with Active Seismic Sources

0542374 - ÚSMH 2022 RIV CH eng J - Journal Article
Bernauer, F. - Behnen, K. - Wassermann, J. - Egdorf, S. - Igel, H. - Donner, S. - Stammler, K. - Hoffmann, M. - Edme, P. - Sollberger, D. - Schmelzbach, C. - Robertsson, J. - Paitz, P. - Igel, J. - Smolinski, K. - Fichtner, A. - Rossi, Y. - Izgi, G. - Vollmer, D. - Eibl, E.P.S. - Buske, S. - Veress, Ch. - Guattari, F. - Laudat, T. - Mattio, L. - Sebe, O. - Olivier, S. - Lallemand, Ch. - Brunner, B. - Kurzych, A.T. - Dudek, M. - Jaroszewicz, L.R. - Kowalski, J.K. - Bonkowski, P.A. - Bobra, P. - Zembaty, Z. - Vackář, Jiří - Málek, Jiří - Brokešová, J.
Rotation, Strain, and Translation Sensors Performance Tests with Active Seismic Sources.
Sensors. Roč. 21, č. 1 (2021), č. článku 264. E-ISSN 1424-8220
Institutional support: RVO:67985891
Keywords : fiber-optic gyroscopes * noise * motions * rotation sensors * strain sensors * seismology * instrumentation
OECD category: Environmental and geological engineering, geotechnics
Impact factor: 3.847, year: 2021
Method of publishing: Open access
https://www.mdpi.com/1424-8220/21/1/264

Interest in measuring displacement gradients, such as rotation and strain, is growing in many areas of geophysical research. This results in an urgent demand for reliable and field-deployable instruments measuring these quantities. In order to further establish a high-quality standard for rotation and strain measurements in seismology, we organized a comparative sensor test experiment that took place in November 2019 at the Geophysical Observatory of the Ludwig-Maximilians University Munich in Furstenfeldbruck, Germany. More than 24 different sensors, including three-component and single-component broadband rotational seismometers, six-component strong-motion sensors and Rotaphone systems, as well as the large ring laser gyroscopes ROMY and a Distributed Acoustic Sensing system, were involved in addition to 14 classical broadband seismometers and a 160 channel, 4.5 Hz geophone chain. The experiment consisted of two parts: during the first part, the sensors were co-located in a huddle test recording self-noise and signals from small, nearby explosions. In a second part, the sensors were distributed into the field in various array configurations recording seismic signals that were generated by small amounts of explosive and a Vibroseis truck. This paper presents details on the experimental setup and a first sensor performance comparison focusing on sensor self-noise, signal-to-noise ratios, and waveform similarities for the rotation rate sensors. Most of the sensors show a high level of coherency and waveform similarity within a narrow frequency range between 10 Hz and 20 Hz for recordings from a nearby explosion signal. Sensor as well as experiment design are critically accessed revealing the great need for reliable reference sensors.
Permanent Link: http://hdl.handle.net/11104/0320605