A Versatile Collaborative PNT Processing Architecture for Tight Coordination Of Distributed GPS Sensors

Patrick Y. Hwang, Gary A. McGraw, Michael J. Armatys, Huan T. Phan, David A. Anderson

Abstract:	A concept for collaborative GPS positioning, navigation, and timing (PNT) processing between multiple nodes is proposed. This processing concept bridges the gap between standard carrier phase real-time kinematic (RTK) and high-accuracy point positioning with zero-age of data (ZAOD) correction sources. By appropriately modeling the kinematic, receiver, propagation, and signal-in-space (SIS) error sources for all nodes, decimeter-level relative positioning and nanosecond-level timing can be achieved over baselines of hundred or even thousands of kilometers. Furthermore, when two-way time transfer (TWTT) measurements between nodes are provided, the Joint PNT filter processing proposed here enables nodes with poor GPS satellite visibility to be aided by nodes with good GPS satellite visibility. Initial performance results of this collaborative PNT concept are provided by using both simulated and recorded GPS data.
Published in:	Proceedings of the 24th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2011) September 20 - 23, 2011 Oregon Convention Center, Portland, Oregon Portland, OR
Pages:	1856 - 1865
Cite this article:	Hwang, Patrick Y., McGraw, Gary A., Armatys, Michael J., Phan, Huan T., Anderson, David A., "A Versatile Collaborative PNT Processing Architecture for Tight Coordination Of Distributed GPS Sensors," Proceedings of the 24th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2011), Portland, OR, September 2011, pp. 1856-1865.
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