# Calibration for the shear strain of 3-component borehole strainmeters in eastern Taiwan through Earth and ocean tidal waveform modeling

Calibration for the shear strain of 3-component borehole strainmeters in eastern Taiwan through... We propose an approach for calibrating the horizontal tidal shear components [(differential extension ( $$\gamma _1$$ γ 1 ) and engineering shear ( $$\gamma _2$$ γ 2 )] of two Sacks–Evertson (in Pap Meteorol Geophys 22:195–208, 1971) SES-3 borehole strainmeters installed in the Longitudinal Valley in eastern Taiwan. The method is based on the waveform reconstruction of the Earth and ocean tidal shear signals through linear regressions on strain gauge signals, with variable sensor azimuth. This method allows us to derive the orientation of the sensor without any initial constraints and to calibrate the shear strain components $$\gamma _1$$ γ 1 and $$\gamma _2$$ γ 2 against $$M_2$$ M 2 tidal constituent. The results illustrate the potential of tensor strainmeters for recording horizontal tidal shear strain. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Geodesy Springer Journals

# Calibration for the shear strain of 3-component borehole strainmeters in eastern Taiwan through Earth and ocean tidal waveform modeling

, Volume 92 (3) – Aug 31, 2017
18 pages

/lp/springer_journal/calibration-for-the-shear-strain-of-3-component-borehole-strainmeters-CVkwiAhqrw
Publisher
Springer Berlin Heidelberg
Subject
Earth Sciences; Geophysics/Geodesy; Earth Sciences, general
ISSN
0949-7714
eISSN
1432-1394
D.O.I.
10.1007/s00190-017-1056-4
Publisher site
See Article on Publisher Site

### Abstract

We propose an approach for calibrating the horizontal tidal shear components [(differential extension ( $$\gamma _1$$ γ 1 ) and engineering shear ( $$\gamma _2$$ γ 2 )] of two Sacks–Evertson (in Pap Meteorol Geophys 22:195–208, 1971) SES-3 borehole strainmeters installed in the Longitudinal Valley in eastern Taiwan. The method is based on the waveform reconstruction of the Earth and ocean tidal shear signals through linear regressions on strain gauge signals, with variable sensor azimuth. This method allows us to derive the orientation of the sensor without any initial constraints and to calibrate the shear strain components $$\gamma _1$$ γ 1 and $$\gamma _2$$ γ 2 against $$M_2$$ M 2 tidal constituent. The results illustrate the potential of tensor strainmeters for recording horizontal tidal shear strain.

### Journal

Journal of GeodesySpringer Journals

Published: Aug 31, 2017

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