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Astronomical Vessel Position Determination Utilizing the Optical Super Wide Angle Lens Camera

Published online by Cambridge University Press:  19 February 2014

Chong-hui Li ,
Yong Zheng ,
Chao Zhang ,
Yu-Lei Yuan ,
Yue-Yong Lian  and
Pei-Yuan Zhou
Chong-hui Li*
Affiliation:
(Zhengzhou Institute of Surveying and Mapping, Zhengzhou, China)
Yong Zheng
Affiliation:
(Zhengzhou Institute of Surveying and Mapping, Zhengzhou, China)
Chao Zhang
Affiliation:
(Zhengzhou Institute of Surveying and Mapping, Zhengzhou, China)
Yu-Lei Yuan
Affiliation:
(School of Computer, National University of Defense Technology, Changsha, China)
Yue-Yong Lian
Affiliation:
(Zhengzhou Institute of Surveying and Mapping, Zhengzhou, China)
Pei-Yuan Zhou
Affiliation:
(Zhengzhou Institute of Surveying and Mapping, Zhengzhou, China)
*
(E-mail: lichonghui6501@126.com)
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Abstract

Celestial navigation is an important type of autonomous navigation technology which could be used as an alternative to Global Navigation Satellite Systems (GNSS) when a vessel is at sea. After several centuries of development, a variety of astronomical vessel position (AVP) determination methods have been invented, but the basic concepts of these methods are all based on angular observations with a device such as a sextant, which has disadvantages including low accuracy, manual operation, and a limited period of observation. This paper proposes a new method that utilises a fisheye camera to image the celestial bodies and horizon simultaneously. Then, we calculate the obliquity of the fisheye camera's principal optical axis according to the image coordinates of the horizon. Next, we calculate the altitude of the celestial bodies according to the image coordinates of the celestial bodies and the obliquity. Finally, the AVP is determined by the altitudes according to the robust estimation method. Experimental results indicate that this method not only could realize automation and miniaturization of the AVP determination system, but could also greatly improve the efficiency of celestial navigation.

Keywords

Astronomical vessel positionFisheye cameraHorizon line fitting
Type
Research Article
Information
The Journal of Navigation , Volume 67 , Issue 4 , July 2014 , pp. 633 - 649
Copyright
Copyright © The Royal Institute of Navigation 2014 

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