Performance analysis of regional tropospheric constrained BDS-3 precise point positioning
To address the problem of long convergence time of PPP. This paper proposes an approach to constrain PPP with additional regional tropospheric delay model values. It utilizes observation data from 16 reference stations in the State Grid Location Based Service Corporation 's Beidou Precision Service Network in the Hunan region to construct a regional tropospheric delay model. Through PPP positioning experiments for rover stations HNYZ and CZZX,improvements brought about by this algorithm are compared and analyzed in terms of PPP positioning accuracy,convergence time,ambiguity parameters,and observation model geometry strength. Experimental results indicate that this algorithm demonstrates superior PPP model geometry strength,significantly enhancing elevation-direction positioning performance. Under static conditions,the convergence time improves by 18. 23％ and 12. 96％,and positioning accuracy improves by 8. 79％and 1. 87％,respectively,for HNYZ and CZZX. Under dynamic conditions,the convergence time improves by 7. 32％and 6. 78％,while positioning accuracy improves by 6. 07％ and 20. 53％,respectively.
precise point positioningregional tropospheric modelexternal tropospheric constraintconvergence timegeometry strength
万方数据
维普
