【作者】 张奋； 贾小林； 阮仁桂； 宗文鹏； 王龙；

【Author】 ZHANG Fen;JIA Xiaolin;RUAN Rengui;ZENG Wenpeng;WANG Long;Xi’an Research Institute of Surveying and Mapping;State Key Laboratory of Geo-Information Engineering;

【机构】 西安测绘研究所； 地理信息工程国家重点实验室；

【摘要】 随着极区战略价值的不断提升,极地应用对于精确定位导航的需求日益迫切。本文在简要介绍GPS、GLONASS、Galileo、BDS-3四大GNSS系统发展概况的基础上,分析了极区GNSS星下点轨迹、PDOP值和可见卫星数,并通过南北极测站的实测数据分析极区GNSS定位精度。结果表明:BDS-3、GPS、Galileo、GLONASS四大全球卫星导航系统均在极区具备独立定位导航能力;BDS-3极区定位精度优于GPS、GLONASS,略差于Galileo;除GPS系统外,BDS-3、GLONASS、Galileo北极区域定位精度均优于南极区域。更多还原

【Abstract】 With climate warming,glaciers melting and the acceleration of globalization,the strategic value of the polar region constantly increases,which greatly improves the demand for polar precise navigation and positioning.Based on a brief introduction to the development of GPS,GLONASS,Galileo and BDS-3,this paper analyzes the geometric characteristic of GNSS in polar region which include of track of sub-satellite point,PDOP value,the visible satellites number,and the positioning accuracy of polar region is analyzed using the measured data from the South and North Poles.Through the experimental analysis,we can see that four global satellite navigation systems such as BDS-3,GPS,Galileo,GLONASS have independent positioning and navigation capabilities in the polar region.The polar positioning accuracy of BDS-3 is better than GPS,GLONASS,and slightly worse than Galileo.In addition to the GPS,the positioning accuracy of BDS-3,Galileo and GLONASS in the North Pole region is better than the South Pole region.更多还原