Convergence Time and Positioning Accuracy Comparison between BDS and GPS Precise Point Positioning

• Main Authors: ZHANG Xiaohong, ZUO Xiang, LI Pan, PAN Yuming
• Format: Article
• Language: zho
• Published: Surveying and Mapping Press 2015-03-01
• Series: Acta Geodaetica et Cartographica Sinica
• Subjects: BDS; precise point positioning; positioning accuracy; convergence time
• Online Access: http://html.rhhz.net/CHXB/html/2015-3-250.htm

BDS/GPS data from MGEX were processed by TriP 2.0 software developed at Wuhan University. Both static and kinematic float PPP are tested by adopting precise satellite orbits and clocks provided by Research Center of GNSS, Wuhan University. The results show that the convergence time of BDS static PPP is about 80min while kinematic PPP is about 100min. For 3h observations, static positioning accuracy of 5 cm and kinematic positioning accuracy of 8 cm in horizontal, about 12 cm in vertical can be achieved. Similar to GPS PPP, precision in east component is worse than north. At present, BDS PPP needs longer convergence time than GPS PPP to reach an absolute positioning accuracy of cm~dm due to the lack of global tracking stations and the limited accuracy of orbit and clock products.