Abstract:Based on the quality analysis of raw GPS/BDS data of Xiaomi 8 smartphone, we propose a GPS/BDS positioning stochastic model combining elevation angle and signal-to-noise ratio. The results show that the positioning accuracy of the combined stochastic model is superior to that of the single factor stochastic model in the standard point positioning(SPP). In the single-frequency precise point positioning(PPP) solution model with additional ionospheric and tropospheric constraints, the positioning accuracy and convergence time of the combined model are better than that of the single factor stochastic model, and the positioning accuracy can converge to less than 1 m in 1 minute, the horizontal positioning accuracy is better than 0.5 m in 5 minutes. The positioning accuracy in horizontal direction and elevation direction is better than 0.2 m and 0.3 m, respectively.
ZHANG Tuo,YE Shirong,XIA Pengfei et al. GPS/BDS Positioning Stochastic Model Combining Elevation Angle and Signal-to-Noise Ratio for Android Smartphone[J]. jgg, 2023, 43(11): 1172-1177.