%0 Generic %1 hadas2019galileoZurich %A Hadas, Tomasz %A Kazmierski, Kamil %A Sosnica, Krzysztof %D 2019 %K myown from:tomasz.hadas 2019 %T Performance of Galileo-only Positioning using the current Galileo constellation %U https://atpi.eventsair.com/QuickEventWebsitePortal/19a07---7th-gnss-colloquium/7th-international-colloquium/Agenda/AgendaItemDetail?id=ff530542-1a79-4cf8-8692-58e2feaeab7e %X The current constellation of Galileo satellites consists of 26 space vehicles, among which are 2 unavailable satellites and 2 satellites in elliptical orbits. For the remaining 22 healthy satellites there are not only broadcast ephemeris available, but also precise products are provided by the International GNSS Service (IGS) under the Multi-GNSS Experiment (MGEX) and real-time products are transmitted by the Centre National d'Études Spatiales (CNES). Therefore, multi-GNSS solutions can be computed, but also Galileo-only positioning is feasible, which even includes absolute positioning in real-time and post-processing mode. In this study, the global availability of Galileo satellites is analysed by means of the number of visible satellites and corresponding PDOP for a variety of elevation angles. Moreover, a comprehensive evaluation of dual-frequency absolute positioning using Galileo is presented and the performance is compared to the one of GPS positioning. We evaluate the performance of daily static and kinematic positioning using pseudoranges only (SPP) as well as pseudoranges with carrier phase data (PPP), based on broadcast ephemeris, real-time CNES products and final MGEX products. We found in more than 99.9% of the time at least 5 Galileo satellites are in view above 10 degree elevation. The performance of Galileo PPP is still not as good as the one of GPS, due to the lower accuracy of final and real-time orbit and clock products. However, an outstanding accuracy of Galileo-only positioning based on broadcast ephemeris is confirmed. The RMSE of static Galileo SPP is 0.14 and 0.43 m for the horizontal and vertical components, respectively, which is almost 2 times better than GPS. Moreover, sub-decimetre accuracy of daily static Galileo PPP based on broadcast ephemeris is achieved. The performance of Galileo-only and GPS-only kinematic positioning is similar, except for PPP analysis using real-time products, which is more accurate for GPS. Finally, we notice that SPP solutions, for both GPS and Galileo, benefit from real-time products, leading to an increase of the accuracy by up to 59%.

@presentation{hadas2019galileoZurich, abstract = {The current constellation of Galileo satellites consists of 26 space vehicles, among which are 2 unavailable satellites and 2 satellites in elliptical orbits. For the remaining 22 healthy satellites there are not only broadcast ephemeris available, but also precise products are provided by the International GNSS Service (IGS) under the Multi-GNSS Experiment (MGEX) and real-time products are transmitted by the Centre National d'Études Spatiales (CNES). Therefore, multi-GNSS solutions can be computed, but also Galileo-only positioning is feasible, which even includes absolute positioning in real-time and post-processing mode. In this study, the global availability of Galileo satellites is analysed by means of the number of visible satellites and corresponding PDOP for a variety of elevation angles. Moreover, a comprehensive evaluation of dual-frequency absolute positioning using Galileo is presented and the performance is compared to the one of GPS positioning. We evaluate the performance of daily static and kinematic positioning using pseudoranges only (SPP) as well as pseudoranges with carrier phase data (PPP), based on broadcast ephemeris, real-time CNES products and final MGEX products. We found in more than 99.9% of the time at least 5 Galileo satellites are in view above 10 degree elevation. The performance of Galileo PPP is still not as good as the one of GPS, due to the lower accuracy of final and real-time orbit and clock products. However, an outstanding accuracy of Galileo-only positioning based on broadcast ephemeris is confirmed. The RMSE of static Galileo SPP is 0.14 and 0.43 m for the horizontal and vertical components, respectively, which is almost 2 times better than GPS. Moreover, sub-decimetre accuracy of daily static Galileo PPP based on broadcast ephemeris is achieved. The performance of Galileo-only and GPS-only kinematic positioning is similar, except for PPP analysis using real-time products, which is more accurate for GPS. Finally, we notice that SPP solutions, for both GPS and Galileo, benefit from real-time products, leading to an increase of the accuracy by up to 59%.}, added-at = {2019-10-09T11:17:57.000+0200}, author = {Hadas, Tomasz and Kazmierski, Kamil and Sosnica, Krzysztof}, biburl = {https://puma.ub.uni-stuttgart.de/bibtex/2704dc2beb32f07268d83767cd7fdaf0b/ins}, eventdate = {06.09.2019}, eventtitle = {7th International Colloquium on Scientific and Fundamental Aspects of GNSS}, interhash = {21358b09b33c4242e16f2b7bc57127f1}, intrahash = {704dc2beb32f07268d83767cd7fdaf0b}, keywords = {myown from:tomasz.hadas 2019}, language = {English}, timestamp = {2019-10-09T09:17:57.000+0200}, title = {Performance of Galileo-only Positioning using the current Galileo constellation }, url = {https://atpi.eventsair.com/QuickEventWebsitePortal/19a07---7th-gnss-colloquium/7th-international-colloquium/Agenda/AgendaItemDetail?id=ff530542-1a79-4cf8-8692-58e2feaeab7e}, venue = {ETH Zürich - Hönggerberg Campus}, year = 2019 }