重力关键比对点连续观测不确定度评估

doi:10.3969/j.issn.1000-1158.2022.12.19

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Abstract The uncertainty of continuous observation results of superconduct gravimeter iGrav-012 at the comparison point of the global absolute gravimeter of National Insitute of Metrology is analyzed. The calibration factor of superconduct gravimeter is -927.96(nm/s²)/V, and the uncertainty is 0.80(nm/s²)/V. The uncertainty of continuous observation results of superconduct gravimeter introduced by the calibration factor is 3.20 nm/s². After 5.5 years′ observation at the same site of superconduct gravimeter and absolute gravimeter, the drift rate of superconduct gravimeter is -14.66(nm/s²)/year, and the uncertainty is 2.1(nm/s²)/year. The uncertainty of continuous observation results of superconduct gravimeter introduced by the drift is 6.30nm/s², and the uncertainty introduced by the two variables to the continuous gravity observation results is 7.07nm/s².

Key words： metrology absolute gravimeter key comparison point superconduct gravimeter calibration factor uncertainty

Received: 26 September 2021 Published: 28 December 2022

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TB931

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	Articles by authors
	MOU Li-shuang
	FENF Jin-yang
	WU Shu-qing
	LI Chun-jian
	WANG Qi-yu

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MOU Li-shuang,FENF Jin-yang,WU Shu-qing, et al. Accuracy Evaluation of Gravity Continuous Observation at Key Comparison Site of Absolute Gravimeter[J]. Acta Metrologica Sinica, 2022, 43(12): 1639-1644.

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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2022.12.19 OR http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2022/V43/I12/1639

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