Decimeter-Level Real-Time Carrier Phase Positioning Using Satellite Link

Dariusz Lapucha, Richard Barker, Lee Ott, Tor E. Melgard, Ole Orpen, Fugro Seastar and Henk Zwaan

Abstract:	Differential GPS is widely used to provide meter-level real-time positioning over a wide area; however, emerging new technologies in offshore surveying and precision farming require higher positioning accuracy. Currently, centimeter level accuracy is only achievable with RTK kinematic systems, which have severe range limitations. In order to address emerging applications that require higher precision, Fugro has developed a new, dualfrequency, carrier-phase, real-time positioning system. This system uses multiple reference stations and Omnistar/Starfix geo-stationary satellite data links to provide coverage over a wide area. Higher accuracy is achieved by exploiting the high precision of dual frequency, carrier phase measurements. Operational realtime tests carried out in different operational environments in the United States and Europe demonstrate an accuracy that is better than 10 centimeters horizontally, and 20 centimeters vertically. This paper introduces the dual frequency carrier phase algorithm used in the system. It also describes the realtime system architecture and summarizes the results of sea and land tests. In addition, potential applications for the new system are examined.
Published in:	Proceedings of the 14th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2001) September 11 - 14, 2001 Salt Palace Convention Center Salt Lake City, UT
Pages:	1624 - 1630
Cite this article:	Lapucha, Dariusz, Barker, Richard, Ott, Lee, Melgard, Tor E., Orpen, Ole, Seastar, Fugro, Zwaan, Henk, "Decimeter-Level Real-Time Carrier Phase Positioning Using Satellite Link," Proceedings of the 14th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2001), Salt Lake City, UT, September 2001, pp. 1624-1630.
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