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| Zero drift of CG-5 gravimeter and its service lifetime |
| SHEN Bo1, YUAN Shang-Wu2, MA Xuan-Long3, HAO Xiao-Han1 |
1. Institute of Geophysics and Geomatics, China University of Geosciences, Wuhan 430074, China;
2. Third Geological Survey Institute of Henan Geological Bureau, Xinyang 464000, China;
3. Geophysical Exploration Party of Hubei Geological Bureau, Wuhan 430056, China |
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Abstract The zero drift and its linearity are the most important performance indexes of gravimeter and also considerably dominate the instrumental accuracy and lifetime. Based on an analysis of drift data from 14 CG-5 gravimeters, the authors found that the average drift rates of the majority of instruments are between 0.7 and 1.7×10-5 m/s2/day in two years. On such a basis in combination with the related data provided by manufacturers, the service lifetimes of CG-5 gravimeters have been inferred in this paper. The normal mean operational lifetime seems to be about 10 years in the area of forty degrees north latitude.
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Received: 23 June 2014
Published: 10 April 2015
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