Workshop 2018
Stefan Shaer - New ambiguity-fixed IGS clock analysis products at CODE - October 29, 2018 • 94 Views
The Center for Orbit Determination in Europe (CODE) IGS analysis center has established the generation of a high-quality signal-specific phase bias product and a fully consistent ambiguity-fixed clock product within its rapid and final IGS-related processing. The new clock products have been submitted to the IGS starting with GPS week 2004 (June 3, 2018) for our IGS rapid and final product lines and starting with GPS week 2006 (July 17, 2018) for our multi-GNSS clock product contribution to MGEX. The MGEX clock product does include ambiguity fixing not only for GPS but also for Galileo. This quantum leap in GNSS clock analysis at CODE could be accomplished due to successful between- satellite ambiguity fixing using undifferenced observation data of IGS receiver network. The new CODE clock products reveal a notably improved quality and, in the end, allow for single-receiver ambiguity resolution, thus enabling integer-PPP (IPPP). Our new clock and bias products are conditioned in a way that maximum consistency may be ensured for ambiguity-float, ambiguity-fixed, and pseudorange-supported, or pseudorange-only PPP applications. In any case, the clock product has to be used in conjunction with the associated phase and pseudorange bias product in order to achieve best possible performance. We will discuss the characteristics of the new CODE clock and phase bias products. Finally, the quality of consistently generated IPPP results is compared to that of benchmark results as obtained from a classical ambiguity-fixed double-difference analysis.

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