Investigation on gPhone gravimeter-119 for gravity variations observation during the 10th International Comparison of Absolute Gravimeters (ICAG-2017)

International Symposium on Precision Engineering Measurement and Instrumentation Pub Date : 2019-03-07 DOI:10.1117/12.2512020

Qi-yu Wang, Lishuang Mou, Jinyang Feng, Chun-jian Li, D. Su, Shuqing Wu

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引用次数: 2

Abstract

The 10th International Comparison of Absolute Gravimeters (ICAG-2017) was held in Changping campus of National Institute of Metrology (NIM), China in October 2017. The observation of gravity variations using relative gravimeters plays an important role in absolute gravimeter comparison and the link of gravity reference value after comparison. We carried out a continuous observation of gPhone gravimeter-119 simultaneously alongside a superconductive gravimeter iGrav-012 for several months. The calibration factor of gPhone-119 is determined to be 0.99355±0.00004 with a precision of 0.004%. When the observation time exceeds 33000 minutes, the calibration values and uncertainties tend to be stable and the precision is better than 0.01%. The non-tidal gravity changes during ICAG-2017 recorded by gPhone-119 are analyzed. The tendency of gravity variations is roughly consistent with that recorded by iGrav-012. The result indicates that the peak-to-peak value of gravity changes is less than 1.5 μGal during the period of ICAG-2017.

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第十届国际绝对重力仪比较(ICAG-2017)期间gPhone重力仪-119重力变化观测研究

第十届绝对重力仪国际比较大会(ICAG-2017)于2017年10月在中国计量科学研究院昌平校区举行。相对重力仪观测重力变化在绝对重力仪比较和比较后重力参考值的联系中起着重要的作用。我们对gPhone重力仪-119与超导重力仪iGrav-012同时进行了几个月的连续观测。确定gPhone-119的校准因子为0.99355±0.00004，精度为0.004%。当观测时间超过33000 min时，定标值和不确定度趋于稳定，精度优于0.01%。对gPhone-119记录的ICAG-2017非潮重力变化进行了分析。重力变化的趋势与iGrav-012记录的大致一致。结果表明:ICAG-2017期间重力变化峰间值小于1.5 μGal;

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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International Symposium on Precision Engineering Measurement and Instrumentation

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