FIRST GNSS POSITIONING USING IOV GALILEO SATELLITES

The two GIOVE satellites, which were GALILEO prototypes, were launched in 2005 and 2008. Mixed GPS/GIOVE PVTs were successfully processed over the last years by CNES. With the successful launch of the four In Orbit Validation GALILEO satellites in 2011 and 2012, it is now possible to combine GALILEO and GPS measurements for positioning, or even get a position from only GALILEO satellites. This paper briefly reminds theoretical approach for multi-constellation PVTs and gives first positioning results for GALILEO only and for GP S/GALILEO. On 12 March 2013, it was possible for the first time to only use GALILEO satellites for real-time positioning. Since that date, signals and ephemerides from GALILEO satellites are nearly continuously broadcast. Presented results are using real ephemerides rather than ground ephemerides used in the past for the GPS/GIOVE mixed PVTs. First analyses show GALILEO only PVTs with a 10 meters or better accuracy when the geometry is good enough, which happens around 5% of time at mid-latitude. GALILEO range accuracy is about a few meters most of the time, and mixed PVTs using GPS and GALILEO measurements can be achieved. First GALILEO only PVT in real-time and in urban areas are also obtained and presented.