BDS-3与GPS在极地的定位性能对比分析

Comparative Analysis of Positioning Performance of BDS-3 and GPS in Polar Regions

为对比分析北斗三号与GPS在极地的定位性能,基于STK软件,分别建立了北斗三号和GPS的仿真星座,并在南北两极选取了四个观测站点,对各站点的卫星可见性和GDOP进行了仿真分析,结果表明北斗三号在极地的平均可见星数比GPS多出一颗左右,北斗三号的GDOP值在南北极维持在“优”的水平,好于GPS,且变化平稳。综合来看,北斗三号在极地的定位性能要优于GPS。

To compare and analyze the positioning performance of BDS-3 and GPS in Polar Regions,based on STK software,the simulation constellations of BDS-3 and GPS are established respectively.Four observation stations were selected in north and south poles,and the satellite visibility and GDOP of each station were simulated and analyzed.The results show that the average number of visible satellites of BDS-3 in Polar Regions is about one more than that of GPS.The GDOP value of BDS-3 remains at an"excellent"level in north and south poles,which is better than GPS and changes steadily.On the whole,the positioning performance of BDS-3 in the Polar Regions is better than GPS.