摘要
采用2019年12月26 H 73个MGEX站的观测数据,从可见卫星数、收敛时间和定位精度等角度对比分析了BDS-2、GPS单系统静态PPP性能,实测数据分析表明:1)GPS卫星在全球范围内有97.3%的区域可见卫星数在8颗及以上,70%的区域可见卫星数在10颗及以上;而对于BDS-2,服务区范围内73%的区域可见卫星数在5颗及以上,有56.9%的区域可见卫星数在8颗及以上;2)BDS-2、GPS单系统平均收敛时间分别为62.7min、36.6min;3)GPS单系统3h时段的定位精度优于4cm,而BDS-2的定位偏差达到了6.6cm,约为GPS的1.6倍;4)随着观测时长增加,两者的定位精度均有不同程度的提高,在24 h时段,GPS精度优于2cm,BDS-2精度优于5 cm。
The observation data of 73 MGEX stations on December 26,2019 were used for experimental analysis.The static PPP performance of BDS-2 and GPS system is compared and analyzed from the aspects of the number of visible satellites,convergence time and positioning accuracy.The experimental results show that:1)at least 8 GPS satellites are visible from 97.3%of the world,and at least 10 are visible from 70%of the world;for BDS-2,at least 5 satellites are visible from 73%of the service areas,and at least 5 are visible from 56.9%of the service area;2)the average convergence time of BDS and GPS is 62.7 min and 36.6 min,respectively;3)the positioning accuracy of GPS in the 3 h period is better than 4 cm,while the positioning deviation of BDS reaches 6.6 cm,which is about 1.6 times that of GPS;4)with the increase of observation time,the positioning accuracy of both has been improved to different degrees;in the 24 h period,the accuracy of GPS was better than 2 cm,and that of BDS-2 was better than 5 cm.
作者
吴庆
刘长建
黄娴
张熙
胡小华
WU Qing;LIU Ghangjian;HUANG Xian;ZHANG Xi;HU Xiaohua(Institute of Geospatial Information,Information Engineering University,Zhengzhou 450001,China;School of Artificial Intelligence and Big Data,Henan University of Technology,Zhengzhou 450001,China)
出处
《测绘科学与工程》
2020年第6期16-22,30,共8页
Geomatics Science and Engineering
