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. © Birkhäuser Verlag, Basel 2009.
CITATION STYLE
Schreiber, K. U., Klügel, T., Velikoseltsev, A., Schlüter, W., Stedman, G. E., & Wells, J. P. R. (2009). The large ring laser G for Continuous earth rotation monitoring. Pure and Applied Geophysics, 166(8–9), 1485–1498. https://doi.org/10.1007/s00024-004-0490-4
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