Feasibility Study of Augmentation and Backup Navigation Systems in Asia-Pacific Region

Chang-Hee Won, Ja-Young Kang, Jong Won Eun and Seong-Pal Lee

Abstract:	The importance of a navigation system is being realized in Korea. The objective of this study is to perform a feasi-bility study of navigation systems appropriate for the Asia-Pacific region. We analyze navigation systems, which can be used as a part of the global navigation sys-tem and also as an independent navigation system. This study shows the possibility of utilizing a set of geosyn-chronous satellites or stratospheric airships for this pur-pose. We propose to use geosynchronous satellites or air-ships to augment existing GPS/GLONASS or even to-be-realized GNSS-2 to cover the Asia-Pacific region. We shall analyze the effects of using GPS and a geostationary satellite or an airship to improve the positioning accuracy. We shall analyze the dilution of precision of the proposed GPS augmentation system. Furthermore, we propose to use the same set of satellites or stratospheric airships, naturally with reduced accuracy, as an alternative satellite navigation system if GPS/GLONASS become unavailable for some unpredictable reasons. Naturally, for the aug-mented navigation system, the simulation showed that the average visibility increases and dilution of precision de-creases. As an independent navigation system, four, five, and six geosynchronous satellites are simulated to provide navigation systems in the Asia-Pacific region. Another simulation shows that five stratospheric airships can be used to provide better positioning accuracy than the five geosynchronous satellites navigation system.
Published in:	Proceedings of the 12th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1999) September 14 - 17, 1999 Nashville, TN
Pages:	2131 - 2138
Cite this article:	Won, Chang-Hee, Kang, Ja-Young, Eun, Jong Won, Lee, Seong-Pal, "Feasibility Study of Augmentation and Backup Navigation Systems in Asia-Pacific Region," Proceedings of the 12th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1999), Nashville, TN, September 1999, pp. 2131-2138.
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