Analysis of the influence of BDS GEO satellite on GPS Precise Point Position of GPS

In order to study the influence of BDS GEO satellite on the precise point positioning of MEO constellation, this paper  analyzes the visible satellite number ,positioning accuracy and convergence time of combination of BDS GEO satellite and MEO satellite,   observation are from MGEX station for 7 consecutive days .The experimental results show that better patial geometry can be obtained with the addition of GEO satellites to MEO satellites. The convergence time can be shortened with combination of GEO satellite and MEO satellite. Reliability of positioning can be improved with addition of GEO satellites,when positioning results of MEO satellite is poor.