[IGSMAIL-8485] Transition of the solution type identifier and 30s clock for Multi-GNSS near real-time products at Wuhan

[郭靖]

Dear Colleagues,

One behalf of the Multi-GNSS analysis center at Wuhan (labeled as WUM), we has provided the hourly updated near real-time solution since DOY 065, 2019. In last several years, the solution was identified as ultra-rapid solution with 'ULT'. After kindly reminding by our colleagues, we notice that the 'NRT' identifier has been assigned to the solution with time latency between real-time and 6 hour in the document "GUIDELINES FOR LONG PRODUCT FILENAMES IN THE IGS V2.0". Hence, the solution type identifier has been transited from 'ULT' to 'NRT' since the 3rd hour of this Thursday (DOY 185, 2024). Moreover, the filename refers to the start point of the file content, i.e. the start of observed data, instead of the start of the prediction. We are sorry for the inconvenience caused by the transition, and apology for the late announcement.

Besides the near real-time orbit, 300s clock, as well as Multi-GNSS dual-frequency OSB products with 1h latency, we also start to provide the hourly-updated 30s high-rate clock products, but the latency is about 1.5 hour. Hopefully, those products can meet the GNSS applications with low latency requirement, and can be download publicly via IGS data center at Wuhan (ftp://igs.gnsswhu.cn/pub/gps/products/mgex) or IGN (ftp://igs.ign.fr//pub/igs/products/mgex).

With best regards,


Dr Jing Guo
Professor in Space Geodesy
GNSS Research Center, Wuhan University
129 Luoyu Road, Wuhan, 430079, P.R. China
Mail: jingguo at whu.edu.cn