Assessment of a New Rover-Enhanced Network-Based Real Time Kinematic GNSS Data Processing Strategy

N. Zinas

Abstract:	Real Time GNSS networks established across countries over the last fifteen years, provide centimetre level accuracy for a wide range of applications differing from precise ship docking to land surveying. The number of users of these networks has steadily increased over the years, and a potential new market has been created. Public sector organizations deploy GNSS Networks to support infrastructure projects. Private companies establish their own networks for commercial or private use. This paper focuses on the exploitation of the advantages of using multiple users operating within a GNSS network as part of the system, as a virtual network of stations that can operate autonomously and combined with the reference station network. A proposed network-RTK methodology that encompasses the multiple users of network RTK services for instantaneous GPS-RTK positioning, is presented. Users are equipped with two way communication means, to transmit their data to a central processing facility (CPF) on an epoch by epoch basis. A centralised approach reduces the need for complex algorithms at the user side. This methodology increases significantly the ambiguity success rate for users that operate near the border limits of the network, or even tens of kilometers outside them. In this case regional GNSS networks could expand their sphere of influence, without the need for additional reference stations. Also the impact on the ambiguity success rates of the estimated between the references stations relative zenith ionospheric delay from the proposed algorithm is discussed and compared against a standard ionospheric model. The effectiveness of the method is demonstrated through data from the South California Integrated GNSS Network (SCING), processed with software developed for this research.
Published in:	Proceedings of the 22nd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2009) September 22 - 25, 2009 Savannah International Convention Center Savannah, GA
Pages:	2696 - 2706
Cite this article:	Zinas, N., "Assessment of a New Rover-Enhanced Network-Based Real Time Kinematic GNSS Data Processing Strategy," Proceedings of the 22nd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2009), Savannah, GA, September 2009, pp. 2696-2706.
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