Abstract:To analyze the positioning accuracy of BDS-3 in polar regions, 7 consecutive days of observation data from 10 MGEX stations are selected for SPP and PPP experiments. The results show that the number of visible satellites of BDS-3 in Arctic and Antarctic regions is similar, which have an average of 9 visible satellites, and the value of PDOP is same, which is about 2.3. The positioning accuracy of BDS-3 is analogous among different frequency points. The positioning accuracy of SPP in Antarctic region is slightly better than that of Arctic region, especially in the U direction. The positioning accuracy is better than 1 m, 1 m, and 5 m in the E, N, and U directions in Arctic region, respectively, and better than 1 m, 1 m, and 2 m in the E, N, and U directions in Antarctic region, respectively. BDS-3 has the same PPP positioning accuracy in polar regions, which is basically consistent with GPS. The positioning accuracy is better than 2 cm in the E, N, and U directions of each combined frequency point.