%A GU Jiachen, SONG Chuanfeng, TIAN Kunjun %T Precision Single Point Positioning Accuracy Analysis of BDS-3 New Frequencies Based on OSB Correction %0 Journal Article %D 2023 %J jgg %R %P 18-22 %V 43 %N 1 %U http://www.jgg09.com %8 2023-01-15 %X

Based on the BDS-2/3 satellites observable-specific signal biases(OSB) correction product published by Wuhan University observation data of eight iGMAS stations in China for one month,we analyze the influence of OSB correction on the pseudo-distance single point positioning and precision point positioning accuracy of BDS-2/3 under the combination mode of B1I/B3I old frequency points and B1C/B2a new frequency points. The results show that the mean of B1I, B3I, B1C and B2a OSB ranged from -80 ns to 70 ns, and the annual stability of OSB at each frequency point are 3.41 ns, 5.87 ns, 2.04 ns and 2.32 ns, respectively. In terms of BDS-2/3 pseudo-range single point positioning, after using OSB product correction, the positioning accuracy of B1I/B3I combination is better than 2.53 m, the positioning accuracy of B1C/B2a combination is better than 3.84 m, and the accuracy improvement is not obvious. In terms of BDS-2/3 precise point positioning, the positioning accuracy of 3D direction using B1I/B3I is better than 7.7 cm, the improvement is about 20.6%, the convergence time is about 38 min, the improvement is about 7.3%. The positioning accuracy of 3D direction of B1C/B2a is better than 3.7 cm, and the improvement is about 11.9%. The convergence time is about 36 min, improved about 16.3%.