000004207 001__ 4207
000004207 005__ 20190507100246.0
000004207 0247_ $$2DOI$$a10.1109/PLANS.2018.8373533
000004207 037__ $$aSCART-2019-0162
000004207 100__ $$aKanj, Amale
000004207 245__ $$aGalileo Open Service Time performance
000004207 260__ $$c2018
000004207 520__ $$aBy the Galileo Initial Services Declaration on 15 December 2016, Galileo has officially started delivering services to users around the world. In addition to the positioning service, Galileo is able to disseminate an accurate time scale referring to UTC or providing to users interoperability with GPS and improving resilience.   Galileo OS users are thus able to obtain a UTC SIS realization by applying the UTC conversion parameters to Galileo System Time (GST), broadcast in Galileo Open Service (OS) navigation message additional parameters, according to the GST-UTC conversion algorithm as described in the GALILEO ICD [1]. In order to monitor Galileo OS Time performance, the French Space Agency (CNES) which is involved in the performance monitoring from the early steps of the program has developed specific independent means using calibrated GPS/Galileo stations. In this context, three Key Performance Indicators (KPIs) are monitored: the offset between the Galileo System Time and UTC, the OS dual-frequency UTC dissemination accuracy and the Galileo to GPS Time Offset (GPGA) dissemination accuracy.  This paper presents the developed monitoring means; explains the used approach for the KPIs computation and shows the results of one year of monitoring at CNES. 
000004207 594__ $$aNO
000004207 700__ $$aDelporte, Jerome
000004207 700__ $$aSuard, Norbert
000004207 700__ $$aBonhoure, Bernard
000004207 700__ $$aDefraigne, Pascale
000004207 773__ $$c1409-1413$$p2018 IEEE/ION Position, Location and Navigation Symposium (PLANS)$$y2018
000004207 8560_ $$fpascale.defraigne@observatoire.be
000004207 905__ $$apublished in
000004207 980__ $$aNONREF