OS and SAR Service Performance Reports for the last quarter of 2018 (covering October, November and December) have been published on the European GNSS Service Centre (GSC) web portal.
The Galileo Open Service (OS) and Search and Rescue (SAR) Service Quarterly Performance Reports for the last quarter of 2018 are available in the Electronic Library, under the Performance Reports section, providing the status of the Galileo constellation and the achieved performance over the reporting period (October, November and December 2018).
These quarterly reports provide the public with the latest information on the Galileo OS and SAR/Galileo Initial Services measured performance statistics with respect to their Minimum Performance Levels (MPLs), as declared in their respective Galileo Service Definition Documents (OS – SDD and SAR – SDD) in particular, on parameters such as:
- For Open Service: Initial Ranging Performance, Galileo to GPS Time Offset (GGTO) determination performance, Galileo Positioning Performance, the Timely Publication of NAGUs;
- For SAR Service: Detection and Location Performance and Infrastructure Availability Performance.
Highlights from Q4-2018 on Galileo Open Service and SAR Service:
As in previous periods, the measured Galileo OS and SAR Service performance figures comfortably exceeded their MPL thresholds.
Some highlights from the Q4-2018 performance reports:
Open Service (see Performance Report)
- The Availability of both the Galileo Ranging Service at the Worst User Location (WUL) and the Healthy Signal were significantly better than the MPLs (all above the MPL target of 87%). In particular, in the fourth quarter the first of these reached a monthly value of 100% during October and December.
- The Galileo UTC Determination Service Availability reached a monthly value of 100% during October and December, and 98.92% in November, comfortably exceeding the MPL target of 87% (despite the event covered in NAGU #2018027). Moreover, the GGTO Determination Availability comfortably exceeded the MPL target over the three months (98.59% in October and 98.24% in both November and December; all values were well above the MPL target of 80%).
- The target MPLs for Publishing NAGUs were met both for Planned (publication at least 24 hours before the start of a scheduled event) and Unplanned (publication no more than 72 hours after an unscheduled event starts) events. A total of 11 NAGUs were published on the GSC web portal in the reporting period.
SAR Service (see Performance Report)
- Detection Service Probability for each of the Reference Beacons (REFBE) every month was above the MPL target (which is 99%).
- Both the single and multi-burst Location Probabilities for each REFBE were, in all cases, well above the MPLs (which are 75% and 98%, respectively).
- SAR Service Infrastructure Performance is measured by the following figures: Availability of the SAR/Galileo Ground Segment, SAR/Galileo Space Segment and SAR/Galileo Server. In the particular case of the Ground Segment availability, all EU MEOLUT Local Facilities show long-term normalised “Nominal” mode availability performance better than the MPL target (specified at 95%), achieving in December 2018 the values: 96.8%, 98.6% and 98.3%, for Larnaca, Maspalomas and Spitsbergen respectively.
For the most up-to-date information on the Galileo system and constellation, visit the European GNSS Service Centre (GSC) website, in particular, the Galileo constellation status section. For an exhaustive description of the Minimum Performance Levels (MPLs), refer to the Galileo OS SDD.
For more details on Galileo performance and its Services, do not hesitate to contact the Galileo Help Desk. Moreover, if you wish to receive NAGUs automatically, please, register on the GSC web portal.
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from European Global Navigation Satellite Systems Agency – Linking space to user needs https://www.gsa.europa.eu/newsroom/news/last-galileo-os-sar-performance-reports-2018-available