StarFire™ SF3: Worldwide Centimeter-Accurate Real Time GNSS Positioning

Liwen Dai, Yiqun Chen, Adhika Lie, Michael Zeitzew, Yuki Zhang

Abstract:	In 2003, John Deere launched the StarFire™ SF2 a global, real-time 10cm Precise Point Positioning (PPP) service. The StarFire™ SF2 service was upgraded in 2011 to support both GPS and GLONASS corrections. The enhanced service employed John Deere proprietary algorithms tailored to provide significantly improved performance providing worldwide 5cm horizontal accuracy without the need for local base stations. This paper will discuss the recent development of the John Deere StarFire™ 6000 receiver and SF3 technology. A high level overview of the StarFire™ SF3 architecture will be presented. Taking advantage of a global reference receiver network consisting of over 60 homogeneous StarFire GNSS receivers, the real-time StarFire™ SF3 correction signals (including precise GNSS satellite orbits, clocks and satellite bias corrections) are generated and broadcast globally via geostationary satellites to users in the field. The StarFire™ SF3 employs GNSS PPP ambiguity resolution on a global scale for both the StarFire network and users’ StarFire GNSS receivers. The John Deere StarFire™ 6000 receivers, with integrated multiple StarFire L-band signal tracking, can provide worldwide centimeter-level, real-time precise positioning using the StarFire™ SF3 service without the need for local or regional reference station infrastructure. The performance of StarFire™ SF3 will be presented in terms of improved positioning accuracy, repeatability and reduced convergence time. Some innovative features including Rapid Recovery, Quick Start, In-Season-Repeatability and a significantly improved RTK Extend™ will also be discussed in this paper.
Published in:	Proceedings of the 29th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2016) September 12 - 16, 2016 Oregon Convention Center Portland, Oregon
Pages:	3295 - 3320
Cite this article:	Dai, Liwen, Chen, Yiqun, Lie, Adhika, Zeitzew, Michael, Zhang, Yuki, "StarFire™ SF3: Worldwide Centimeter-Accurate Real Time GNSS Positioning," Proceedings of the 29th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2016), Portland, Oregon, September 2016, pp. 3295-3320. https://doi.org/10.33012/2016.14673
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