崔浩猛, 王解先, 王明华, 王虎, 朱卫东, 侯阳飞. 利用卫星分布概率对BDS-3性能的评估[J]. 武汉大学学报 ( 信息科学版), 2021, 46(6): 938-946. DOI: 10.13203/j.whugis20190172
引用本文: 崔浩猛, 王解先, 王明华, 王虎, 朱卫东, 侯阳飞. 利用卫星分布概率对BDS-3性能的评估[J]. 武汉大学学报 ( 信息科学版), 2021, 46(6): 938-946. DOI: 10.13203/j.whugis20190172
CUI Haomeng, WANG Jiexian, WANG Minghua, WANG Hu, ZHU Weidong, HOU Yangfei. Service Performance Assessment of BDS-3 Using Satellite Distribution Probability[J]. Geomatics and Information Science of Wuhan University, 2021, 46(6): 938-946. DOI: 10.13203/j.whugis20190172
Citation: CUI Haomeng, WANG Jiexian, WANG Minghua, WANG Hu, ZHU Weidong, HOU Yangfei. Service Performance Assessment of BDS-3 Using Satellite Distribution Probability[J]. Geomatics and Information Science of Wuhan University, 2021, 46(6): 938-946. DOI: 10.13203/j.whugis20190172

利用卫星分布概率对BDS-3性能的评估

Service Performance Assessment of BDS-3 Using Satellite Distribution Probability

  • 摘要: 为了研究北斗卫星导航系统(BeiDou navigation satellite system,BDS)在全球范围内的服务性能,基于卫星的分布概率,分别对北斗全球卫星导航系统(简称北斗三号系统,BDS-3)和北斗二号系统(BDS-2)在“一带一路”沿线,以及BDS-3在全球范围的可见卫星数和精度因子进行了预测和评估,重点分析了BDS-3与BDS-2在中国及全球区域的定位精度差异。结果表明,现阶段BDS在“一带一路”沿线的可见卫星数为8~20颗,几何精度因子小于1.85,在中国区域其值为1.3~1.4;BDS-3完整系统在全球的可见卫星数为7~15颗,相比于BDS-2,其地球同步轨道卫星+倾斜地球同步轨道卫星的覆盖率有所下降,但中圆地球轨道卫星的可见卫星数可增加6~8颗;在中国及周边区域,BDS-3的平均空间精度因子、水平精度因子、高程精度因子和钟差精度因子分别为1.356、0.759、1.123和0.682,相比于其在全球范围的平均值提升了4%~13%,相比于BDS-2在该区域的定位精度提升了19%~37%。

     

    Abstract:
      Objectives  The BeiDou global navigation satellite system (BDS-3), which provides high-accuracy positioning, navigation and timing (PNT) services to global users, has completed the construction in 2020.
      Methods  To analyze the performance of BDS-3, the total number of visible satellites of BDS-3 preliminary system and BDS-2 over the 'Belt and Road' area is calculated by using a method based on satellite distribution probability, then the satellite visibility of the full constellation BDS-3 over the global areas is also estimated with the same method. In addition, the dilution of precision (DOP) and their differences between BDS-3 and BDS-2 for stations at different geographical locations are investigated.
      Results  Results indicate that, over the 'Belt and Road' area, the total number of visible BDS-3 preliminary system and BDS-2 satellites is 8-20, and the geometrical DOP (GDOP) is less than 1.85.In China and its surrounding areas, the visible number is more than 16, the GDOP is between 1.3 and 1.4. For the full constellation BDS-3-only, the number of visible satellite is 7-15 over the global areas. The total number of visible full constellation BDS-3 geostationary earth orbit satellites and inclined geosynchronous orbit satellites is less than that of BDS-2, but for medium earth orbit satellites, the number of visible satellites of the former system is more than that of the latter system by 6-8. With a better satellite visibility, the average BDS-3 position DOP, horizontal DOP, vertical DOP and time DOP are 1.356, 0.759, 1.123 and 0.682 over China and its surrounding areas, respectively, which are 22.6%, 28.8%, 19.2% and 37.0% lower than those of BDS-2, and have 4%-13% improvement compared to the global DOP averages.
      Conclusions  Compare to the BDS-2, BDS-3 satellite visibility has been improved significantly, while it will provide higher accuracy and more reliable PNT services to global users for its better satellite constellation.

     

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