Author:
Yu Dongyao,Xiong Zhiming,Cao Juliang,Cai Shaokun,Yu Ruihang,Liu Wei
Abstract
The measurement of Earth’s gravitational field is important in geophysics, geodynamics, geodesy, oceanography, and space science. The ocean covers 71% of the earth’s surface; therefore, measuring the ocean’s gravitational field is crucial. Compared with shipborne gravimetry, underwater gravimetry near the seafloor is closer to gravity sources and can obtain short-wavelength gravity information that is useful for small-scale deposit detection and seawater intrusion monitoring. This article focuses on gravimetric errors caused by the poor dynamics of the carrier; an error compensation method for underwater gravimetry based on correlation analysis is proposed. By analyzing the error sources that affect the dynamics of the carrier, the relationship between the gravimetry error and impact factors related to the dynamics was established, and the model’s parameters were estimated by the least-squares fitting method. The experimental data show that this method can effectively compensate for gravimetric errors caused by carrier dynamics and provide the theoretical basis and algorithm model for underwater gravimetry in the bottom-tracking mode.
Funder
National Natural Science Foundation of China
Subject
Fluid Flow and Transfer Processes,Computer Science Applications,Process Chemistry and Technology,General Engineering,Instrumentation,General Materials Science
Reference6 articles.
1. Systematic error compensation for airborne gravimetry;Sun;Chin. J. Geophys.,2013
2. Post mission error compensation method of gravity gradiometry based on deep learning;Cheng;Glob. Geol.,2021
3. A general model for compensating remainder dynamic environment effect on marine and airborne gravimetry;Huang;Acta Geod. Cartogr. Sin.,2020
4. Li, J., Zhang, K., and Zhang, Q. (2009, January 16–19). A Performance Analysis and Precise Temperature Control of Accelerometers for Airborne gravimetry. Proceedings of the International Conference on Electronic Measurement & Instruments, Beijing, China.
5. A new method for underwater dynamic gravimetry based on multisensor integrated navigation;Xiong;Geophysics,2020