Abstract:This paper assesses performance of BDS/GNSS on positioning and velocity measurement in normal waterway and reservoir waterway by precise point positioning and time-differenced carrier phase, respectively. The results show that, in normal waterway, the positioning accuracy of BDS-2 is 0.1-0.2 m. GPS, BDS-3 and BDS achieve positioning accuracy better than 0.07 m and 0.09 m on the horizontal and vertical direction, respectively. Their velocity accuracy reaches the mm/s level. Compared with signal system, positioning and velocity accuracy are improved by 30% for BDS/GPS, GPS/GLONASS/BDS/Galileo. In reservoir waterway, the accuracy of GPS is severely weakened, resulting in a 0.6 m positioning accuracy on horizontal direction. The positioning accuracy of BDS-3 and BDS is slightly reduced. After combination of multiple systems, environmental influence on positioning and velocity accuracy is substantially reduced to basically the same as the normal waterway.
YANG Junling,LIU Kezhong,ZHENG Kai et al. Performance Analysis of BDS/GNSS in Precise Positioning and Velocity Estimation in Chuanjiang Waterway[J]. jgg, 2022, 42(5): 466-471.