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Reconstruction of the Instantaneous Earth Rotation Vector with Sub-Arcsecond Resolution Using a Large Scale Ring Laser Array

André Gebauer1,2, Monika Tercjak3, Karl Ulrich Schreiber2,4,5,*, Heiner Igel1, Jan Kodet2, Urs Hugentobler2, Joachim Wassermann1, Felix Bernauer1, Chin-Jen Lin1 et al.

Stefanie Donner1, Sven Egdorf1, Andrea Simonelli1, and Jon-Paul R. Wells4,5

  • 1Ludwig Maximilians University, Department of Earth and Environmental Sciences, Theresienstrasse 41, 80333 Munich, Germany
  • 2Technical University of Munich, Research Facility Satellite Geodesy, Arcisstrasse 21, 80333 Munich, Germany
  • 3Warzaw University of Technology, Department of Geodetic Astronomy, Warsaw 00-661, Poland
  • 4Dodd Walls Centre for Photonic and Quantum Technologies, Duniden 9054, New Zealand
  • 5School of Physical and Chemical Sciences, University of Canterbury, PB 4800, Christchurch 8140, New Zealand

  • *Corresponding author. ulrich.schreiber@tum.de
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Phys. Rev. Lett. 125, 033605 – Published 17 July, 2020

DOI: https://doi.org/10.1103/PhysRevLett.125.033605

Abstract

Absolute rotation rate sensing with extreme sensitivity requires a combination of several large scale gyroscopes in order to obtain the full vector of rotation. We report on the construction and operation of a four-component, tetrahedral laser gyroscope array as large as a five story building and situated in a near surface, underground laboratory. It is demonstrated that reconstruction of the full Earth rotation vector can be achieved with sub-arcsecond resolution over more than six weeks.

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Real-Time Measurements of Earth’s Spin and Tilt

Published 17 July, 2020

An array of ring lasers provides the first continuous measurement of Earth’s motion from a single location.

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Phys. Rev. Lett. 125, 033605– Published 17 July, 2020
  • Received 3 February 2020
  • Accepted 18 June 2020
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