Keynote: Analysis of the Extended Orbit and Clock Corrections for Real-Time PPP

Hongzhou Yang, Yang Gao, Chaoqian Xu, Zhixi Nie

Peer Reviewed

Abstract:	Precise satellite orbit and clock corrections are crucial for the Precise Point Positioning (PPP), and more and more applications urge for real-time results nowadays. In recognition of this demand from the user community, for example, the International GNSS Service (IGS) formed a Real-time Working Group in 2001 to develop and operate Real-Time Service (RTS) in terms of technologies, standards and infrastructure. Currently, the IGS RTS products consist of three categories, namely the Broadcast Ephemeris, phase/code bias and the orbit/clock correction to Broadcast Ephemeris (http://igs.org/rts/products), which are broadcasted to the real-time users through internet based on NTRIP. But correction outage is not uncommon, either due to corrupted ephemeris or loss of communication link, will degrade the availability real-time PPP. To tackle the above problem, an extension of the existing SSR message package is introduced and the performance will be investigated extensively in this paper, especially for the cases of frequent outages. In the new package, Solar Radiation Parameters (SRP) for satellite orbit and periodical terms for satellite clock offsets will be added to supplement the existing SSR orbit and clock corrections. After extension of the existing SSR message package, continuous precise satellite orbit and clock corrections will be available during correction outages. In the experiment part, the continuous outage will be simulated with different period, such as 5, 10 and 15 mins, both kinematic and static PPP will be carried out in the experiment part.
Published in:	Proceedings of the ION 2017 Pacific PNT Meeting May 1 - 4, 2017 Marriott Waikiki Beach Resort & Spa Honolulu, Hawaii
Pages:	653 - 658
Cite this article:	Yang, Hongzhou, Gao, Yang, Xu, Chaoqian, Nie, Zhixi, "Keynote: Analysis of the Extended Orbit and Clock Corrections for Real-Time PPP," Proceedings of the ION 2017 Pacific PNT Meeting, Honolulu, Hawaii, May 2017, pp. 653-658. https://doi.org/10.33012/2017.15090
Full Paper:	ION Members/Non-Members: 1 Download Credit Sign In