2017年10月至12月,中国计量科学研究院作为主导实验室,组织全球14个国家的计量院或其指定实验室进行了第10届全球绝对重力仪关键比对(CCM.G-K2.2017)。由于不同类型绝对重力仪参考高度不一样,此次比对相对重力测量主要实现将不同参考高度测得的绝对重力值归算到同一高度进行比较。根据比对初步结果,相对重力测量结果的合成标准不确定度优于4μGal,确保了此次比对最终结果的准确有效。
Abstract
As pilot lab, National Institute of Metrology (NIM) organized national metrology institutes or designated institutes from 14 countries in the world to participate in the 10th international comparison of absolute gravimeters (CCM.G-K2.2017). Due to the reference height of different types of absolute gravimeters is different, the relative gravity measurements of the comparison mainly focus on transferring the absolute gravity value from the different reference heights to the same reference height. According to the preliminary results of the comparison, the combined standard uncertainty of relative gravity measurement was better than 4μGal, which ensured the validity and accuracy of the final result of the comparison.
关键词
计量学 /
绝对重力仪比对 /
相对重力测量 /
重力垂直梯度 /
不确定度 /
关键比对
Key words
metrology /
absolute gravimeter /
relative gravity measurement /
vertical gravity gradient /
uncertainty /
international comparison
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参考文献
［1］吴书清, 李春剑, 徐进义, 等. CCM. G-K2国际比对和NIM-3A型绝对重力仪［J］. 计量学报, 2017, 38(1): 127-128.
Wu S Q, Li C J, Xu J Y, et al. The Comparison of Absolute Gravimeters CCM. G-K2 and NIM-3A Absolute Gravimeter［J］. Acta Metrologica Sinica, 2017, 38(1): 127-128.
［2］Francis O, Baumann H, Ullrich C, et al. CCM. G-K2 key comparison［J］. Metrologia, 2015, 52(1): 22–23.
［3］Jiang Z, Pálinká V, Francis O, et al. Relative Gravity Measurement Campaign during the 8th International Comparison of Absolute Gravimeters［J］. Metrologia, 2012, 49: 95–107.
［4］Draft of Technical Protocol of the Comparison in 2017［ED］. http://10.6.22.49/ICAG2017Website/files/Draft_TP%20CCM.G-K2.2017-v5.3.pdf, 2018-10-26.
［5］Camp M V, Vauterin P. Tsoft: graphical and interactive software for the analysis of time series and Earth tides［J］. Computers & Geosciences, 2005, 31(5): 631-640.
［6］Scintrex (2017) CG-6 Autograv Gravity Meter Operation Manual［ED］. http://www.scintrex.com.
［7］牟丽爽, 冯金扬, 王启宇, 等. iGrav-012超导重力仪定期格值结果分析［J］. 计量学报, 2019, 40(3): 373-377.
Mou L S, Feng J Y, Wang Q Y, et al. Analysis of Calibration Factor of Superconducting Gravimeter iGrav-012［J］. Acta Metrologica Sinica, 2019, 40(3): 373-377.
基金
国家重点研发计划(2016YFF0200103)
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