Editing Galileo (satellite navigation) (section)

==== Quarterly Service Performance Reports ====
The European GNSS Service Centre provides public quarterly performance reports regarding the Open Service and Search and Rescue Service since 2017. Generally, the reported performance parameters measurements surpass the target values.<ref name="Performance Reports">{{cite web|url=https://www.gsc-europa.eu/electronic-library/galileo-service-performance-reports|title=Performance Reports|publisher=European GNSS Service Centre|date=30 November 2021|access-date=30 November 2021|url-status=dead|archive-date=30 November 2021|archive-url=https://web.archive.org/web/20211130154542/https://www.gsc-europa.eu/electronic-library/galileo-service-performance-reports}}</ref>
The Galileo April, May, June 2021 Quarterly Open Service Performance Report by the European GNSS Service Centre reported the UTC Time Dissemination Service Accuracy was ≤&nbsp;4.3 [[nanosecond]]s, computed by accumulating samples over the previous 12 months and exceeding the ≤&nbsp;30 ns target value. The Signal In Space Error (SISE) was also well within the ≤&nbsp;{{cvt|2|m}} target value for Single and (more accurate) Dual Frequency receivers.<ref name="Timing accuracy2">{{cite web|url=https://www.gsc-europa.eu/sites/default/files/sites/all/files/Galileo-OS-Quarterly-Performance_Report-Q2-2021.pdf |archive-url=https://web.archive.org/web/20211020204407/https://www.gsc-europa.eu/sites/default/files/sites/all/files/Galileo-OS-Quarterly-Performance_Report-Q2-2021.pdf |archive-date=2021-10-20|title=EUROPEAN GNSS (GALILEO) SERVICES OPEN SERVICE QUARTERLY PERFORMANCE REPORT APRIL - JUNE 2021|publisher=European GNSS Service Centre|date=1 July 2021|access-date=30 November 2021|url-status=live}}</ref><ref name="Timing accuracy">{{cite web|url=https://www.gsa.europa.eu/galileo/services/initial-services|title=Galileo Goes Live|publisher=European GNSS Agency|date=15 December 2016|access-date=1 February 2017|archive-date=15 January 2021|archive-url=https://web.archive.org/web/20210115130957/http://www.gsa.europa.eu/galileo/services/initial-services|url-status=live}}</ref> The Galileo navigation message includes the differences between Galileo System Time (GST), UTC and GPS Time (GPST) (to promote interoperability).<ref>{{Cite web |url=http://www.unoosa.org/pdf/icg/2012/Timescale-GALILEO.pdf |title=GNSS Timescale Description |access-date=5 October 2015 |archive-date=28 October 2020 |archive-url=https://web.archive.org/web/20201028210310/http://www.unoosa.org/pdf/icg/2012/Timescale-GALILEO.pdf |url-status=live }}</ref><ref>{{cite web|url=http://www.insidegnss.com/node/3560|title=ESA Adds System Time Offset to Galileo Navigation Message|website=insidegnss.com|access-date=5 October 2015|archive-date=28 March 2018|archive-url=https://web.archive.org/web/20180328231238/http://www.insidegnss.com/node/3560|url-status=dead}}</ref>
The Galileo April, May, June 2021 Quarterly Search and Rescue Service Performance Report by the European GNSS Service Centre reported the various performance parameters measurements surpassed their target values.
<ref name="Timing accuracy3">{{cite web|url=https://www.gsc-europa.eu/sites/default/files/sites/all/files/Galileo-EnS-SAR-Quarterly-Performance_Report-Q2-2021.pdf |archive-url=https://web.archive.org/web/20210924134048/https://www.gsc-europa.eu/sites/default/files/sites/all/files/Galileo-EnS-SAR-Quarterly-Performance_Report-Q2-2021.pdf |archive-date=2021-09-24|title=EUROPEAN GNSS (GALILEO) SAR SERVICE QUARTERLY PERFORMANCE REPORT APRIL – JUNE 2021|publisher=European GNSS Service Centre|date=1 July 2021|access-date=30 November 2021|url-status=live}}</ref>