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Pure and Applied Geophysics

, Volume 166, Issue 8–9, pp 1485–1498 | Cite as

The Large Ring Laser G for Continuous Earth Rotation Monitoring

  • K. U. SchreiberEmail author
  • T. Klügel
  • A. Velikoseltsev
  • W. Schlüter
  • G. E. Stedman
  • J.-P. R. Wells
Article

Abstract

Ring Laser gyroscopes exploit the Sagnac effect and measure rotations absolute. They do not require an external reference frame and therefore provide an independent method to monitor Earth rotation. Large-scale versions of these gyroscopes promise to eventually provide a similar high resolution for the measurement of the variations in the Earth rotation rate as the established methods based on VLBI and GNSS. This would open the door to a continuous monitoring of LOD (Length of Day) and polar motion, which is not yet available today. Another advantage is the access to the sub-daily frequency regime of Earth rotation. The ring laser “G” (Grossring), located at the Geodetic Observatory Wettzell (Germany) is the most advanced realization of such a large gyroscope. This paper outlines the current sensor design and properties.

Keywords

Gas lasers ring laser Sagnac interferometry earth rotation 

PACS numbers

91.10.Nj 91.10.Pp 42.60.By 42.60.Da 

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Copyright information

© Birkhäuser Verlag, Basel 2009

Authors and Affiliations

  • K. U. Schreiber
    • 1
    Email author
  • T. Klügel
    • 2
  • A. Velikoseltsev
    • 1
  • W. Schlüter
    • 2
  • G. E. Stedman
    • 3
  • J.-P. R. Wells
    • 3
  1. 1.Technische Universität München, Forschungseinrichtung Satellitengeodäsie, Geodätisches Observatorium WettzellBad KötztingGermany
  2. 2.Bundesamt für Kartographie und Geodäsie, Geodätisches Observatorium WettzellBad KötztingGermany
  3. 3.Department of Physics and AstronomyUniversity of CanterburyChristchurchNew Zealand

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