High precision atom interferometer-based dynamic gravimeter measurement by eliminating the cross-coupling effect

Yang Zhou; Wenzhang Wang; Guiguo Ge; Jinting Li; Danfang Zhang; Meng He; Biao Tang; Jiaqi Zhong; Lin Zhou; Runbing Li; Lin Mao; Hao Che; Leiyuan Qian; Yang Li; Fangjun Qin; Jie Fang; Xi Chen; Jin Wang; Mingsheng Zhan

arXiv · 2312.09260

High precision atom interferometer-based dynamic gravimeter measurement by eliminating the cross-coupling effect

Yang Zhou·Wenzhang Wang·Guiguo Ge·Jinting Li·Danfang Zhang·Meng He·Biao Tang·Jiaqi Zhong·Lin Zhou·Runbing Li·Lin Mao·Hao Che·Leiyuan Qian·Yang Li·Fangjun Qin·Jie Fang·Xi Chen·Jin Wang·Mingsheng Zhan

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Abstract

A dynamic gravimeter with an atomic interferometer (AI) can perform absolute gravity measurements with high precision. AI-based dynamic gravity measurement is a type of joint measurement that uses AI sensors and a classical accelerometer. The coupling of the two sensors may degrade the measurement precision. In this study, we analyzed the cross-coupling effect and introduced a recovery vector to suppress this effect. We improved the phase noise of the interference fringe by a factor of 1.9 by performing marine gravity measurements using an AI-based gravimeter and optimizing the recovery vector. Marine gravity measurements were performed, and high gravity measurement precision was achieved. The external and inner coincidence accuracies of the gravity measurement are 0.42 mGal and 0.46 mGal, which were improved by factors of 4.18 and 4.21 by optimizing the cross-coupling effect.

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Yang Zhou, Wenzhang Wang, Guiguo Ge, Jinting Li, Danfang Zhang, Meng He, Biao Tang, Jiaqi Zhong, Lin Zhou, Runbing Li, Lin Mao, Hao Che, Leiyuan Qian, Yang Li, Fangjun Qin, Jie Fang, Xi Chen, Jin Wang, Mingsheng Zhan. 2023-12-12. High precision atom interferometer-based dynamic gravimeter measurement by eliminating the cross-coupling effect. https://arxiv.org/abs/2312.09260

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