[IGSMAIL-8604] IGS WCC combined products released

[Jianghui Geng]

Dear Colleagues,

We are pleased to announce that the IGS Wuhan Combination Center (WCC) Pilot Project has established self-explained webpages showing the statistical results of satellite phase orbit/clock/bias combination over AC’s individual contributions. The links are
(1) Rapid product combination: https://igs.org/wg/wcc/#rapid
(2) Final product combination: https://igs.org/wg/wcc/#final

Both webpages are updated weekly, with visualizations provided by the State Key Laboratory of Precision Geodesy, APM, Chinese Academy of Sciences. We sincerely thank all contributing ACs for their valuable work. Users are encouraged to check these pages for the latest product status to support their PPP applications using the WCC products.

In addition, for demonstration purposes, since March 9, 2025, the combined products (WCC0OPSRAP and WCC0OPSFIN) have been uploaded routinely to the WCC online repository (ftps://bdspride.com). The Final product is updated weekly with 1-2 weeks of latency (representing the delay between the product's reference date and its release time), while the Rapid product is updated daily with 2-3 days of latency.

The WCC0OPSRAP and WCC0OPSFIN products provide combined satellite orbits, clocks, biases, attitudes, and Earth Rotation Parameter (ERP) solutions with sampling rates of 5 minutes, 30 seconds, 1 day, 30 seconds, and 1 day, respectively. In addition, combined station clocks with a 5-minute sampling rate are also available. Notably, the Final product provides an extra 24:00 epoch and has undergone day-boundary discontinuity alignment to enhance product continuity and consistency across days.

Please do not hesitate to contact us if you find any problems with the WCC products.

Please refer to 
Geng J, Yan Z, Wen Q, Männel B, Masoumi S, Loyer S, Mayer-Gürr T, Schaer S (2024) Integrated satellite clock and code/phase bias combination in the third IGS reprocessing campaign. GPS Solut. 28, 150. doi: 10.1007/s10291-024-01693-9
Geng J, Wen Q, Chen G, Dumitraschkewitz P, Zhang Q (2024) All-frequency IGS phase clock/bias product combination to improve PPP ambiguity resolution. J. Geod. 98, 48. doi:10.1007/s00190-024-01865-y


Best,
Jianghui Geng on behalf of the PRIDE group including Qiang Wen and Yahao Zhang.

Professor in GNSS Geodesy
Director of State Key Laboratory of Precision Geodesy,
APM, Chinese Academy of Sciences, Wuhan, China
Email: jgeng at apm.ac.cn
Office: +86 (0)27 68881316
Homepage: http://pride.whu.edu.cn

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