First Evaluation of the Performance of RTK-QZSS Positioning

Hideki Yamada, Takeyasu Sakai and Ken Ito

Abstract:	QZSS (Quasi-Zenith Satellite System) is a Japanese satellite navigation program with a regional service coverage. The orbits for QZS (quasi-zenith satellite) are 24-hour elliptic orbit inclined 43 degrees in order to broadcast radio signals from high elevation angle into urban canyons. The first QZSS satellite, QZS-1 “Michibiki” was successfully launched in 2010 and the technical verification has been conducted by several organizations. The original concept of QZSS consists of three or more satellites on so-called Quasi-Zenith orbit and optional geostationary satellites, so as to enable satellite positioning independent of GPS. The performance of such a constellation would be limited in comparison with GPS, however, this will work as the national minimum backup regarding unexpected outage of GPS. The performance expected with QZSS-only positioning has been investigated and it has been confirmed, by using a real-time simulator, that QZSS-only positioning could work well as the minimum backup system of GPS. Simulation results show that position accuracy of seventens of meters with code differential QZSS. However, it is not known if QZSS-only positioning can work well as the minimum backup system of high precision positioning This paper explores the potential performance of RTK positioning provided by QZSS-only constellation. It was confirmed, by using a real-time simulator, that QZSS-only positioning could provide centimeter-class solution and could work well as the minimum backup system of the high precision positioning
Published in:	Proceedings of the 2013 International Technical Meeting of The Institute of Navigation January 29 - 27, 2013 Catamaran Resort Hotel San Diego, California
Pages:	203 - 208
Cite this article:	Yamada, Hideki, Sakai, Takeyasu, Ito, Ken, "First Evaluation of the Performance of RTK-QZSS Positioning," Proceedings of the 2013 International Technical Meeting of The Institute of Navigation, San Diego, California, January 2013, pp. 203-208.
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