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| The Comparison of Absolute Gravimeters CCM.G-K2 and NIM-3A Absolute Gravimeter |
| WU Shu-qing,LI Chun-Jian,XU Jin-yi,SU Duo-wu,FENF Jin-yang,JI Wang-xi |
| National Institute of Metrology, Beijing 100029, China |
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Abstract Based on laser interference technology and free-fall theory, the National Institute of Metrology (China) has developed the latest NIM-3A type absolute gravimeter.This instrument has participated in the 9th international comparison of absolute gravimetries CCM.G-K2,according to the published result of CCM.G-K2,the NIM-3A type absolute gravimeter with the combined standard uncertainty of 5.3 μGal is agreed with the key comparison reference value and the degree of equivalence is gained.
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Received: 17 July 2015
Published: 28 December 2016
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Corresponding Authors:
Shu-Qing WU
E-mail: wushuqing828@163.com
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［4］Francis O,Baumann H,Ullrich C,et al.CCM.G-K2 key comparison［J］.Metrologia,2015,52:07009. |
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2017, Vol. 38 
