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Updated Galileo ICD Previews New Features for Faster TTFF in 2023


The European GNSS Agency (GSA) released a new Galileo Open Service Signal in Space Interface Control Document (OS SIS ICD), the second issue of this document geared towards GNSS receiver manufacturers. Although the modified signals are not yet broadcast by Galileo satellites, the ICD will allow GNSS receiver manufacturers to prepare for the improved signals, set for debut in 2023.
Among other updates, three new features are introduced to the I/NAV message transmitted on the Galileo E1-B signal component: Reduced Clock and Ephemeris Data (RedCED); Reed-Solomon Outer Forward Error Correction Data (FEC2); and Secondary Synchronization Pattern (SSP).
The OS SIS ICD v.2.0 is available for download in the Programme Reference Documents section of the European GNSS Service Centre (GSC) web portal. ....

Programme Reference , Service Centre , Galileo Programme , Galileo Open Service Signal , Space Interface Control Document , Reduced Clock , Ephemeris Data , Reed Solomon Outer Forward Error Correction Data , Secondary Synchronization Pattern , Programme Reference Documents , Reference Time , Open Service , Galileo System Time , ப்ரோக்ராம் குறிப்பு , சேவை மையம் , கலிலியோ ப்ரோக்ராம் , கலிலியோ திறந்த சேவை சமிக்ஞை , இடம் இடைமுகம் கட்டுப்பாடு ஆவணம் , குறைக்கப்பட்டது கடிகாரம் , நாணல் சாலமன் ஔடர் முன்னோக்கி பிழை திருத்தம் தகவல்கள் , ப்ரோக்ராம் குறிப்பு ஆவணங்கள் , குறிப்பு நேரம் , திறந்த சேவை , கலிலியோ அமைப்பு நேரம் ,

Galileo Logs a 5-Hour Timing-Related Outage; Explanation Awaited


A subsequent communication posted on the European GNSS Service Centre said Galileo service had been affected,
“by an anomaly in the time determination function of the ground segment of the system.”
The communication went on: “This resulted in signals flagged as MARGINAL (SISA=NAPA) for all satellites. During this period, pseudorange errors in excess of nominal performance were experienced by user receivers.
“The system was reconfigured and restored to a nominal situation as of Dec 14, 06:00 UTC. A NAGU [NOTICE ADVISORY TO GALILEO USERS] will be published shortly with the exact chronology of the event. Further communication will be published as the investigation on the root cause for the event and its effect on the service progresses.” ....

Hydrogen Maser , Service Centre , Timing Facility , Galileo System Time , Precise Timing Facility , சேவை மையம் , நேரம் வசதி , கலிலியோ அமைப்பு நேரம் , ப்ரிஸைஸ் நேரம் வசதி ,