New method of underwater passive navigation based on gravity gradient

Lin Wu; Jiaqi Gong; Hua Cheng; Jie Ma; Jinwen Tian

doi:10.1117/12.749408

14 November 2007 New method of underwater passive navigation based on gravity gradient

Lin Wu, Jiaqi Gong, Hua Cheng, Jie Ma, Jinwen Tian

Proceedings Volume 6790, MIPPR 2007: Remote Sensing and GIS Data Processing and Applications; and Innovative Multispectral Technology and Applications; 67901V (2007) https://doi.org/10.1117/12.749408
Event: International Symposium on Multispectral Image Processing and Pattern Recognition, 2007, Wuhan, China

Abstract

A new method of underwater passive navigation based on gravity gradient is proposed in this paper. In comparison with some other geophysical characteristics such as gravity or gravity anomaly, gravity gradient which is the second derivative of gravitational potential has better spatial resolution and more sensitive to terrain changes. Through it, the digitally stored gravity gradient maps and real-time gravity gradient measurements can be taken as input information, with gravity gradient linearization techniques and extended Kalman filter, the navigation errors of INS are estimated by using gravity gradient error, therefore the output in the inertial navigation system are corrected. Simulation test has been done and the results show that, the method is effective and efficient for the positioning precision improvement.

Citation Download Citation

Lin Wu, Jiaqi Gong, Hua Cheng, Jie Ma, and Jinwen Tian "New method of underwater passive navigation based on gravity gradient", Proc. SPIE 6790, MIPPR 2007: Remote Sensing and GIS Data Processing and Applications; and Innovative Multispectral Technology and Applications, 67901V (14 November 2007); https://doi.org/10.1117/12.749408

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