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.
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2020, Vol. 41 
