地球物理学进展 ›› 2019, Vol. 34 ›› Issue (5): 1707-1713.doi: 10.6038/pg2019BB0588

• 固体地球物理及空间物理学(大气、行星、地球动力学、重磁电及地震学、地热学) • 上一篇    下一篇

BDS/GPS/GLONASS多模融合伪距单点定位性能比较与分析

布金伟1,2,3,左小清2,*(),周羽佳2,常军4,李小龙5,范军2   

  1. 1. 中国矿业大学环境与测绘学院,徐州 221116
    2. 昆明理工大学国土资源工程学院,昆明 650093
    3. 自然资源部国土环境与灾害监测重点实验室,徐州 221116
    4. 自然资源部第一大地测量队,西安 710054
    5. 东华理工大学测绘工程学院,南昌 330013
  • 收稿日期:2018-11-20 修回日期:2019-06-22 出版日期:2019-10-28 发布日期:2019-10-28
  • 通讯作者: 左小清 E-mail:zuoxq@163.com
  • 作者简介:布金伟,男,1992年生,云南楚雄人,博士研究生,主要研究方向为组合导航与定位技术、GNSS卫星导航定位理论与应用和多模多频GNSS精密单点定位.(E-mail: b_jinwei@163.com)
  • 基金资助:
    云南省应用基础研究计划面上项目(2018FB078);国家重点研发计划(2016YFB0502601-04);国家自然科学基金(41501437);江西省科技厅星火计划项目(20161BBB29002);云南省高校工程研究中心建设计划联合资助.

Comparison and analysis of BDS/GPS/GLONASS multi-mode fusion pseudo-range positioning performance

BU Jin-wei1,2,3,ZUO Xiao-qing2,*(),ZHOU Yu-jia2,CHANG Jun4,LI Xiao-long5,FAN Jun2   

  1. 1. School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, China
    2. Faculty of Land Resources Engineering, Kunming University of Science and Technology, Kunming 650093, China
    3. Key Lab of Land,Environment and Disaster Monitoring,Ministry of Natural Resources, Xuzhou 221116, China
    4. The First Geodetic Surveying Brigade of Ministry of Natural Resources, Xi’an 710054, China;
    5. Faculty of Geomatics,East China University of Technology, Nanchang 330013, China
  • Received:2018-11-20 Revised:2019-06-22 Online:2019-10-28 Published:2019-10-28
  • Contact: Xiao-qing ZUO E-mail:zuoxq@163.com

摘要:

利用最小二乘法原理推导了多系统组合伪距单点定位的数学模型.然后,对不同组合模式(BDS、GPS、GLONASS、BDS/GPS、BDS/GLONASS、GPS/GLONASS和BDS/GPS/GLONASS)的单点定位进行解算和试验比较分析.试验结果表明:多系统(BDS/GPS/GLONASS)组合单点定位与单系统相比,多系统组合具有更多的可视卫星,从而获得了较小的PDOP值,随着截止高度角的增加,可见卫星数逐渐减少,定位精度也会随之降低.然而,在观测条件恶劣、截止高度角较大情况下,单系统和双系统定位精度都较差,三系统组合仍能获得比较好的定位精度,1 d内的定位精度均在10 m以下,优于GPS单点定位精度.使其在建筑物密集区、山区和卫星遮挡较为严重的恶劣条件下具有实际应用价值.

关键词: BDS/GPS/GLONASS, 多模融合, 伪距单点定位, 可见卫星数, 定位精度

Abstract:

The mathematical model of multi-system combined pseudorange single point positioning was derived using the principle of least squares. Then, the single point positioning of different combination modes (BDS,GPS,GLONASS,BDS/GPS,BDS/GLONASS,GPS/GLONASS and BDS/GPS/GLONASS) is solved and analyzed comparatively. The experimental results show that: Compared with single-system positioning of multi-system (BDS/GPS/GLONASS), multi-system combination has more visible satellites, and thus smaller PDOP values are obtained, with increasing cut-off angle , It can be seen that the number of satellites is gradually reduced, and the positioning accuracy is also reduced. However, under the conditions of poor observation conditions and large cut-off angles, the single-system and dual-system positioning accuracy is poor, and the three-system combination can still obtain better positioning accuracy. The positioning accuracy within 1 d is less than 10 m, which is better than GPS single point positioning accuracy. It has practical application value in harsh conditions where buildings are densely packed, mountainous areas and satellites are blocked more severely.

Key words: BDS/GPS/GLONASS, Multimode fusion, Pseudo range single point positioning, Visible satellite number, Positioning accuracy

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