′The Belt and Road′ Surrounding Areas BDS Dynamic Positioning Performance Analysis

   In this paper, uses STK software for BDS global network constellation structure to sign the current structure of the simulation, the dynamic changes of the areas along “The Belt and Road” minimum visible satellite number, GDOP value, and the positioning precision of the positioning performance. The results show that, BDS has been able to cover most areas of “The Belt and Road”, China, Southeast Asia, South Asia and other regions of the positioning accuracy is better than 13meter,but the accuracy of positioning in small parts of Northern Europe, Eastern Europe and West Asia has yet to be improved. The GEO satellite over the GEO／IGSO satellite of “The Belt and Road” surrounding areas along the role to the improvement of the positioning accuracy. In addition, with the increase of the number of visible satellites, the GDOP value decreased gradually, but when the visible satellite number reaches a certain value, with the increase of the number of visible satellites, the GDOP value decrease is not significant, that means increasing the number of visible satellites is not certain can improve the positioning accuracy.