Network Approach to Precise GPS Navigation

P. Wielgosz, D. Grejner-Brzezinska, I. Kashani

Abstract:	The success of precise GPS positioning over long baselines depends on the ability of resolving the integer phase ambiguities, a challenging task, especially when real time kinematic (RTK) is required. Over the past few years, the use of GPS reference station network approach has shown a great promise in extending the inter-receiver separation in post-processing and RTK modes. This paper presents preliminary results obtained with a beta version of an instantaneous GPS positioning/navigation software using multiple reference stations. The results presented here are obtained using instantaneous (epoch-by-epoch) processing and ambiguity resolution technique in post-processing mode, while the target implementation is RTK. The distances from the reference stations to the rover varied from 30 to 37 km and 480 observational epochs (four hours) were processed. In the approach presented here, we tested baseline-wise ambiguity resolution and a network solution for coordinates introducing resolved ambiguities from all the baselines. The resulting network-derived coordinates were compared to the coordinates obtained from single baseline solutions in terms of repeatability, robustness and accuracy.
Published in:	Proceedings of the 59th Annual Meeting of The Institute of Navigation and CIGTF 22nd Guidance Test Symposium (2003) June 23 - 25, 2003 Hyatt Regency Hotel Albuquerque, NM
Pages:	397 - 403
Cite this article:	Updated citation: Published in NAVIGATION: Journal of the Institute of Navigation
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