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arXiv · 2508.17765

Analysis of the Dick Effect for AI-based Dynamic Gravimeter

Wen-Zhang Wang·Xi Chen·Jin-Ting Li·Dan-Fang Zhang·Wei-Hao Xu·Jia-Yi Wei·Jia-Qi Zhong·Biao Tang·Lin Zhou·Jin Wang·Ming-Sheng Zhan
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Abstract

Atom interferometer (AI)-based dynamic gravimeter enable high-precision absolute gravity measurements, crucial for applications in geophysics, navigation, resource exploration, and metrology. Understanding their underlying mechanisms and minimizing measurement noise are essential for enhancing performance. This work investigates the gravity measurement noise in AI-based systems induced by the dead time of the classical accelerometer. Using actual dynamic gravity measurement data, we demonstrate that a dead time of 0.12 s introduces significant gravity measurement noise of 8 mGal. To elucidate the mechanism of this noise, we derive a formula for this noise in frequency domain, identifying high-frequency aliasing as its source. Analysis of the derived expressions indicates that reducing the dead time duration and suppressing the high-frequency noise of the acceleration are effective strategies for mitigating this noise. This work provides significant insights for noise analysis and future scheme design of AI-based dynamic gravimeters.

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Wen-Zhang Wang, Xi Chen, Jin-Ting Li, Dan-Fang Zhang, Wei-Hao Xu, Jia-Yi Wei, Jia-Qi Zhong, Biao Tang, Lin Zhou, Jin Wang, Ming-Sheng Zhan. 2025-08-25. Analysis of the Dick Effect for AI-based Dynamic Gravimeter. https://arxiv.org/abs/2508.17765

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