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

Autor: Cedric Schmelzbach, Piotr Bońkowski, Johana Brokešová, Stefanie Donner, Pascal Edme, Piotr Bobra, Charlie Lallemand, Gizem Izgi, Jiří Vackář, Joachim Wassermann, Jerzy Kowalski, Patrick Paitz, Laurent Mattio, Olivie Sèbe, Andreas Fichtner, David Sollberger, Klaus Stammler, Yara Rossi, Anna Kurzych, Jonas Igel, Johan O. A. Robertsson, Kathrin Behnen, Eva P. S. Eibl, Leszek R. Jaroszewicz, Frédéric Guattari, Krystyna Smolinski, Stefan Buske, Mathias Hoffmann, Jiří Málek, Sven Egdorf, Zbigniew Zembaty, Theo Laudat, Christian Veress, Heiner Igel, Serge Olivier, D. Vollmer, Michał Dudek, Felix Bernauer, Basil Brunner
Rok vydání: 2021
Předmět:
Zdroj: Sensors, Vol 21, Iss 264, p 264 (2021)
Sensors
Volume 21
Issue 1
Sensors, 21 (1)
Sensors (Basel, Switzerland)
ISSN: 1424-8220
DOI: 10.3390/s21010264
Popis: 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 Fürstenfeldbruck, 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.
Sensors, 21 (1)
ISSN:1424-8220
Databáze: OpenAIRE
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