Analysis of Galileo signal-in-space range error and positioning performance during 2015–2018

摘要: A long-term analysis of signal-in-space range error (SISRE) is presented for all healthy Galileo satellites, and the first pair full operational capability satellites in wrong elliptical orbits. Both orbit clock errors show an obvious convergence trend over time. The annual statistical analyses that average root mean squares (RMSs) SISRE constellation are 0.58 m (2015), 0.29 m (2016), 0.23 m (2017), 0.22 m (2018). Currently, accuracy superior to global positioning system (GPS) Block IIF (0.35 m). In addition, accounts majority SISRE, while approximately one-third due high stability onboard atomic clock. Single point results achieves 2–3 m, which comparable GPS despite smaller number worse geometry. Interestingly, vertical Galileo, uses NeQuick ionospheric model, higher than GPS. Positioning with single frequency E1 E5 a precision E5a E5b signals. Regarding precise (PPP), indicate can be achieved among different stations current constellation. For static PPP, RMS values Galileo-only solutions within 1 cm horizontally, RMSs mostly 2 cm horizontally. kinematic 4 cm horizontally 6 cm vertically.