Abstract:This paper attempts to solve the problem that, due to the loss of visible satellites in signal shadowed regions, GPS or BDS single system cannot meet the minimum requirements of relative positioning. We first discuss the mathematical model of the GPS/BDS single epoch baseline solution. It compares GPS/BDS combined solution results with GPS and BDS single system solution results with respect to satellite visibility, ambiguity resolution success rate, and positioning accuracy in multiple simulative masking environment. The numerical results show that: compared with the single epoch baseline resolution of a single system, GPS/BDS greatly increases the number of visible satellites, improves the success rate of ambiguity, and effectively improves the positioning accuracy under extreme observation conditions. In addition, the dual-frequency single epoch accuracy can reach cm-level or even mm-level in signal shadowed regions.
YAN Chao,FANG Xinjian,LIU Yang et al. Precision Analysis of GPS/BDS Dual-Frequency Single Epoch Short Baseline Solution in Signal Shadowed Regions[J]. jgg, 2018, 38(7): 679-683.