Shift evaluation of the atomic gravimeter NIM-AGRb-1 and its comparison with FG5X
A mobile atomic absolute gravimeter NIM-AGRb-1 based on light-pulse atom interferometer has been built, evaluated by the National Institute of Metrology (NIM) China, and participated in the pilot study of the International Comparison of Absolute Gravimeters (CCM.G-K2.2017) held at NIM Changping Beij...
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Published in | Metrologia Vol. 55; no. 3; pp. 360 - 365 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
Bristol
IOP Publishing
01.06.2018
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Subjects | |
Online Access | Get full text |
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Summary: | A mobile atomic absolute gravimeter NIM-AGRb-1 based on light-pulse atom interferometer has been built, evaluated by the National Institute of Metrology (NIM) China, and participated in the pilot study of the International Comparison of Absolute Gravimeters (CCM.G-K2.2017) held at NIM Changping Beijing in October 2017. The sensitivity of the gravimeter is 44 µGal Hz−1/2 (1 µGal = 10−8 m s−2 10−9 g) and its instability reaches as small as 0.2 µGal when averaged over 30 000 s. The instrumental and environmental effects were evaluated and corrected with a total uncertainty of 5.2 µGal. The absolute g measured by NIM-AGRb-1 was compared to that of a commercial FG5X-249 optical gravimeter with the two devices operating side by side in the same laboratory and their results agree within −0.2(6.3) µGal. NIM-AGRb-1 also demonstrated continuous operation over a period of more than 500 h. |
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Bibliography: | Bureau International des Poids et Mesures MET-101035.R3 |
ISSN: | 0026-1394 1681-7575 |
DOI: | 10.1088/1681-7575/aab637 |