[IGSMAIL-8724] WCC ultra-rapid combined products and Wuhan archived RTS products

[Jianghui Geng]

Dear Colleagues

Sorry for cross posting.

We are pleased to release the WCC0OPSULT ultra-rapid combined products and the archived WUM0MGXRTS products from the Wuhan IGS Real-Time Service (RTS).

The WCC (Wuhan Combination Center) ultra-rapid product combination is carried out operationally, and the combined products have been routinely archived on ftps://bdspride.com/wcc/ since June of 2026. The products are generated every six hours with a typical latency of roughly 6–8 hours. In-house evaluations showed that the observed parts achieved positioning precisions of about 5 and 8 mm in horizontal and vertical directions, respectively, for GPS or Galileo daily positioning, while 20 and 30 mm for GLONASS, benchmarked by the IGS weekly solutions. A dedicated webpage under the IGS WCC website has been established to visualize the combined ultra-rapid satellite orbit and clock solutions, together with the performance of individual AC’s contributions (https://igs.org/wg/wcc/#ultra).

In addition, the real-time GNSS product streams from Wuhan (IGSMAIL-8424) have long been archived as WUM0MGXRTS products at ftp://igs.gnsswhu.cn/pub/whu/phasebias/ since two years ago. These RTS include satellite orbit, clock and all-frequency phase/code bias products. They are typically available near immediately despite two hours of latency, and could provide positioning performance comparable with the rapid products. The open-source PRIDE PPP-AR (https://github.com/PrideLab/PRIDE-PPPAR/) software would automatically download and process the RTS products if the rapid products have not yet been available. This feature would provide ultra-rapid solutions for those urgent tasks. The archived RTS products will also be available at ftps://bdspride.com/wum/ from GPS week 2427.

This work is funded by National Science Foundation of China (U25D8020) and Central Government Funds for Hubei Science & Technology Development (2025CSA009). The reference is
Guo J, Geng J, Zeng J, Song X, Defraigne P (2024) GPS/Galileo/BDS phase bias stream from Wuhan IGS analysis center for real-time PPP ambiguity resolution. GPS Solut. 28, 67. doi:10.1007/s10291-023-01610-6

Best,
Jianghui Geng on behalf of the PRIDE Group including Jiang Guo, 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.apm.ac.cn
SKL hpage: https://sklpg.apm.ac.cn

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