Abstract：In the middle-long baseline solution, the atmospheric error between stations cannot be completely eliminated by double difference, which affects the fixing and precision of ambiguity. After obtaining the wide lane ambiguity, this paper uses a Kalman filter algorithm to estimate the ambiguity of L1 and B1 fundamental frequency, and uses LAMBDA algorithm to determine the ambiguity. Taking the medium-long baseline measured data of three-dimensional mobile deformation platform as an example, several long and medium baselines under three modes of GPS, BDS and GPS/BDS are calculated. Overall, the precision of GPS/BDS integrated system is improved to a certain extent, as compared with single GPS and single BDS. The fixing and correction rates of each baseline of GPS/BDS integrated system are better than 82.08% and 81.53%, the precision of X, Y, Z can reach 15.4 mm, 15.9 mm and 20.1 mm, and the 3D direction accuracy can be better than 30.0 mm. In 20.8 km and 46.6 km baselines, the median errors can be better than 18.8 mm and 22.5 mm respectively, and the relative median errors are better than 1/71.9 and 1/60.1 respectively.
XU Wei,YU Xuexiang,JIA Xue et al. Performance Analysis of Medium-Long Baseline Solution in GPS/BDS System Based on 3D Mobile Deformation Platform[J]. jgg, 2019, 39(9): 934-941.
