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The effects of tilt on interferometric rotation sensors

Pham, D. N., H. Igel, J. Wassermann, A. Cochard, and U. Schreiber (2009), The effects of tilt on interferometric rotation sensors, BSSA, 99(2B), 1352-1365, doi:10.1785/0120080181.

Ring laser rotation sensors are contaminated by rotations around horizontal axes (also called tilts) through the vector product between the local normal direction and the vector of the rotation rate composed of Earth’s rotation and local ground rotations. In this study, we investigate theoretically this cross-axis sensitivity and estimate the effects based on magnitude-amplitude relations to be expected for observations of local earthquakes and tele-seismic events. We investigate tilt-ring laser coupling for rotational motions in the P coda of several past earthquakes using tilt motions derived from observed translations. The results show that compared to the corresponding vertical rotation rate tilt-ring laser coupling is negligible for observations of tele-seismic events and for all the applicable range of the local magnitude scale.
  author = {D. N. Pham and H. Igel and J. Wassermann and A. Cochard and U. Schreiber},
  journal = {BSSA},
  month = {may},
  number = {2B},
  pages = {1352-1365},
  title = {{The effects of tilt on interferometric rotation sensors}},
  volume = {99},
  year = {2009},
  doi = {10.1785/0120080181},
%0 Journal Article
%A Pham, D. N.
%A Igel, H.
%A Wassermann, J.
%A Cochard, A.
%A Schreiber, U.
%D 2009
%N 2B
%V 99
%P 1352-1365
%T The effects of tilt on interferometric rotation sensors
%8 may
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