Participation in the absolute gravity comparison with a compact cold atom gravimeter
The first Asia-Pacific Comparison of Absolute Gravimeters (APMP.M.G-K1) was organized by the National Institute of Metrology (NIM) of China during from December 21st, 2015 to March 25th, 2016 in Changping, Beijing. Our compact cold atom gravimeter (CCAG) was transported from Hangzhou to Beijing with a long distance of about 1200 km to participate in this comparison. The CCAG is the only one which based on the principle of atom interferometry among all the instruments. The absolute gravity in the indicated three test sites has been measured as requested by the organizer. The sensitivity of our CCAG is estimated to be 90 μGal/√Hz even when the measurements are carried out without any vibration isolation. Besides, the accuracy of this gravimeter has been evaluated to be about 19 μGal by considering the significant system errors. Our results show a good agreement with the given reference value.
作者单位：Institute of Optics
Fu Zhijie,Wang Qiyu,Wang Zhaoying,Bin Wu,Cheng Bing,Lin Qiang. Participation in the absolute gravity comparison with a compact cold atom gravimeter[J].Chinese Optics Letters,2019,17(1):01.