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Automated Quality Assessment of Interferometric Ring Laser Data.

Andreas Brotzer1, Felix Bernauer1, Karl Ulrich Schreiber2

  • 1Department of Earth and Environmental Sciences, Ludwig Maximilian University Munich, Theresienstr. 41, D-80333 Munich, Germany.

Sensors (Basel, Switzerland)
|June 2, 2021
PubMed
Summary

Scientists developed an automated method to assess ring laser data quality for seismic measurements. This ensures reliable data from advanced rotational seismology instruments like ROMY.

Keywords:
ROMYSagnac effectdata quality controlring laser data processingrotation rate sensorsrotational seismology

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Area of Science:

  • Seismology and geophysics.
  • Advancements in optical instrumentation for Earth sciences.

Background:

  • Recent decades show increased efforts to observe all 12 degrees of seismic ground motion, including translational, strain, and rotational components.
  • Large-scale ring laser installations like ROMY (ROtational Motion in seismologY) have emerged as key tools for geoscientific applications.
  • Heterolithic ring laser structures, such as ROMY, are susceptible to optical frequency drifts, necessitating novel data handling approaches.

Purpose of the Study:

  • To present an automated approach for assessing the data quality and performance of ring laser systems.
  • To apply this scheme to ROMY data for detecting operational issues and assigning quality flags.

Main Methods:

  • Development of an automated quality assessment scheme based on the characteristics of the interferometric Sagnac signal.
  • Application of the developed scheme to data from the ROMY (ROtational Motion in seismologY) ring laser array.

Main Results:

  • The automated scheme successfully detects compromised operation states in the ROMY ring laser.
  • Quality flags are assigned to data, enabling identification of reliable measurements.

Conclusions:

  • The developed automated approach provides a robust method for quality control of ring laser data.
  • This quality assessment will be crucial for ensuring data integrity once the ROMY database is publicly accessible.