AUTOREGRESSIVE ANALYSIS FOR THE DETECTION OF EARTHQUAKES WITH A RING LASER GYROSCOPE

2001 ◽  
Vol 01 (01) ◽  
pp. R41-R50 ◽  
Author(s):  
DUNCAN P. McLEOD ◽  
B. TOM KING ◽  
GEOFFREY E. STEDMAN ◽  
K. ULRICH SCHREIBER ◽  
TERRY H. WEBB
Keyword(s):  
Phase Angle ◽  
Ring Laser ◽  
Seismic Waves ◽  
P Wave ◽  
Quantum Limit ◽  
S Wave ◽  
Large Ring ◽  
Rotational Components ◽  
Ring Laser Gyroscope ◽  
Laser Gyroscope

The second-order autoregressive AR(2) model is used to analyze rotational data for seismic events captured by a large ring laser gyroscope. Both the Sagnac frequency and linewidth estimates obtained from this model sense the rotational components of seismic waves. An event of magnitude M L = 6.5 at a distance of D = 5.4° from a large ring laser gyroscope operating at its quantum limit is used to compare the AR(2) model with the previous analytical phase angle method of analysis. The frequency, linewidth and analytic phase angle data each satisfactorily estimate the rotation magnitude. The direct detection of rotational motion in the P wave coda is observed, demonstrating the conversion to transverse S wave polarizations by the local geology.

scholarly journals On tidal tilt corrections to large ring laser gyroscope observations

2013 ◽  
Vol 196 (1) ◽  
pp. 189-193 ◽  
Author(s):  
Wei Tian
Keyword(s):  
High Frequency ◽  
Ring Laser ◽  
Seismic Waves ◽  
Earth’S Rotation ◽  
Earth's Rotation ◽  
Tilt Correction ◽  
Large Ring ◽  
Fast Development ◽  
Ring Laser Gyroscope ◽  
Laser Gyroscope

Abstract With the fast development of the large ring laser gyroscope (RLG) technology in the last decades, promising applications in geophysics and geodesy (e.g. observations of high-frequency variations of Earth's rotation, Earth's tide tilt and seismic waves) have been realized by various groups with currently running large RLGs. In this letter, we point out that in a large number of previous tilt correction models a significant term is missing. This term is related with the Shida number l2 (called l2-term in the following) and has a contribution, which is comparable with that from high-frequency Earth rotation variations due to ocean tides, to the Sagnac frequency record of RLGs. This term has to be removed (as part of the tilt correction) from the raw data so that RLGs can efficiently be employed as Earth's rotation detectors.

High-frequency noise caused by wind in large ring laser gyroscope data

2012 ◽  
Vol 16 (4) ◽  
pp. 777-786 ◽  
Author(s):  
A. Gebauer ◽  
K. U. Schreiber ◽  
T. Klügel ◽  
N. Schön ◽  
U. Ulbrich
Keyword(s):  
High Frequency ◽  
Ring Laser ◽  
Frequency Noise ◽  
High Frequency Noise ◽  
Large Ring ◽  
Ring Laser Gyroscope ◽  
Laser Gyroscope

Design and operation of a very large ring laser gyroscope

1999 ◽  
Vol 38 (12) ◽  
pp. 2516 ◽  
Author(s):  
Clive H. Rowe ◽  
Ulrich K. Schreiber ◽  
Steven J. Cooper ◽  
B. Tom King ◽  
Morrie Poulton ◽  
...  
Keyword(s):  
Ring Laser ◽  
Large Ring ◽  
Ring Laser Gyroscope ◽  
Laser Gyroscope

How to Detect the Chandler and the Annual Wobble of the Earth with a Large Ring Laser Gyroscope

2011 ◽  
Vol 107 (17) ◽  
Author(s):  
K. U. Schreiber ◽  
T. Klügel ◽  
J.-P. R. Wells ◽  
R. B. Hurst ◽  
A. Gebauer
Keyword(s):  
Ring Laser ◽  
Large Ring ◽  
The Earth ◽  
Ring Laser Gyroscope ◽  
Laser Gyroscope ◽  
Annual Wobble

Precision stabilization of the optical frequency in a large ring laser gyroscope

1998 ◽  
Vol 37 (36) ◽  
pp. 8371 ◽  
Author(s):  
Ulrich K. Schreiber ◽  
Clive H. Rowe ◽  
Douglas N. Wright ◽  
Steven J. Cooper ◽  
Geoffrey E. Stedman
Keyword(s):  
Ring Laser ◽  
Optical Frequency ◽  
Large Ring ◽  
Ring Laser Gyroscope ◽  
Laser Gyroscope

scholarly journals Concept of MEMS Ring Laser Gyroscope with Movable Optical Parts

2009 ◽  
Vol 1 (1) ◽  
pp. 564-567 ◽  
Author(s):  
T. Hashimoto ◽  
J. Maeya ◽  
T. Fujita ◽  
K. Maenaka
Keyword(s):  
Ring Laser ◽  
Ring Laser Gyroscope ◽  
Laser Gyroscope
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