Accurate Determination of the Calibration Factor of iGrav-007 Superconducting Gravimeter

JIA Jiangang; LUAN Wei; SHEN Wenbin

doi:10.13203/j.whugis20130780

Volume 40 Issue 10

Oct. 2015

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Geomatics and Information Science of Wuhan University > 2015 > 40(10): 1366-1370,1376. > DOI: 10.13203/j.whugis20130780

JIA Jiangang, LUAN Wei, SHEN Wenbin. Accurate Determination of the Calibration Factor of iGrav-007 Superconducting Gravimeter[J]. Geomatics and Information Science of Wuhan University, 2015, 40(10): 1366-1370,1376. DOI: 10.13203/j.whugis20130780

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Accurate Determination of the Calibration Factor of iGrav-007 Superconducting Gravimeter

1.
School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China;
2.
Key Laboratory of Geospace Environment and Geodesy, Ministry of Education, Wuhan University, Wuhan 430079, China

Funds: The National 973 Program of China, No.2013CB733305;the National Natural Science Foundation of China, No.41210006.

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Received Date: July 03, 2014
Published Date: October 04, 2015

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Abstract

The iGrav superconducting gravimeter is the newest relative gravity meter with the highest accuracy and most portable measurements in the world. It provides the most stable relative gravity measurement. The calibration factor for the iGrav-007 superconducting gravimeter was accurately determined using site observations obtained with the FG5-112 absolute gravimeter and the iGrav-007 superconducting gravimeter at Wuhan Jiufeng station,based on Least Square method. The data processing results show that the calibration factor was(-91.640 2±0.085 2)×10^-8 m·s^-2·V^-1 with a relative calibration accuracy of 0.092 9%, the accuracy of the calibration factor obtained by the absolute gravimeter for one day was better than 0.2%, the accuracy of the calibration factor obtained by absolute gravimeter for three days was better than 0.1%.
- iGrav-007,
- FG5-112,
- superconducting gravimeter,
- calibration factor,
- accuracy analysis

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