测绘通报 ›› 2018, Vol. 0 ›› Issue (9): 13-18,23.doi: 10.13474/j.cnki.11-2246.2018.0271

• 学术研究 • 上一篇    下一篇

BeiDou+GLONASS+Galileo多系统组合SPP稳定性和精度分析

布金伟1, 左小清1, 金立新2,3, 李海强1, 周羽佳1, 常军4   

  1. 1. 昆明理工大学国土资源工程学院, 云南 昆明 650093;
    2. 中铁第一勘察设计院集团有限公司, 陕西 西安 710043;
    3. 甘肃铁道综合工程勘察院有限公司, 甘肃 兰州 730000;
    4. 国家测绘地理信息局第一大地测量队, 陕西 西安 710054
  • 收稿日期:2018-04-19 修回日期:2018-06-19 出版日期:2018-09-25 发布日期:2018-09-29
  • 作者简介:布金伟(1992-),男,硕士生,主要研究方向为GNSS卫星导航定位、多模多频GNSS精密单点定位。E-mail:b_jinwei@163.com
  • 基金资助:

    云南省高校工程研究中心建设计划

Stability and Precision Analysis of BeiDou+GLONASS+Galileo Multi-system Combined SPP

BU Jinwei1, ZUO Xiaoqing1, JIN Lixin2,3, LI Haiqiang1, ZHOU Yujia1, CHANG Jun4   

  1. 1. School of Land and Resources Engineering, Kunming University of Science and Technology, Kunming 650093, China;
    2. China Railway First Survey and Design Institute Group Co. Ltd., Xi'an 710043, China;
    3. The General Engineering Survey Institute of Railways of Gansu Co. Ltd., Lanzhou 730000, China;
    4. First Survey Team of State Bureau of Surveying and Mapping Geographic Information, Xi'an 710054, China
  • Received:2018-04-19 Revised:2018-06-19 Online:2018-09-25 Published:2018-09-29
  • Contact: 左小清。E-mail:zuoxq@163.com E-mail:zuoxq@163.com

摘要:

利用间接平差法和最小二乘法原理推导了BeiDou+GLONASS+Galileo三系统组合标准单点定位(SPP)的数学模型;然后采用MGEX站的部分测站的观测数据,综合分析了BeiDou/GLONASS/Galileo不同组合模式的可见卫星数、DOP值、定位稳定性和定位精度等方面内容。试验结果表明:相比单系统(BeiDou、GLONASS、Galileo)、双系统(BeiDou+GLONASS、BeiDou+Galileo、GLONASS+Galileo),BeiDou+GLONASS+Galileo三系统组合的DOP值分别减少30%~55%、10%~50%;可见卫星数分别增加60%~120%、10%~110%。此外,在截止高度角大于30°的情况下,单系统和双系统的DOP值都较大且波动不稳定,定位可靠性和历元可用率会显著降低,而BeiDou+GLONASS+Galileo组合仍能获得比较理想的定位结果,这对于建筑物密集区、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: BeiDou+GLONASS+Galileo, 多系统组合, SPP, 可见卫星数和DOP值, 定位精度

Abstract:

Based on the indirect adjustment method and the principle of least squares,the mathematical model of the combined standard single point positioning (SPP) of BeiDou+GLONASS+Galileo system is deduced.Then,using the observation data from some stations of the MGEX station,authors comprehensively analyze the number of visible satellites,DOP values,positioning stability,and positioning accuracy from different combinations of BeiDou,GLONASS or Galileo.The experimental results show that the DOP values of the BeiDou+GLONASS+Galileo three-system combination is reduced by 30%~55% and 10%~50% respectively compared to the single system (BeiDou,GLONASS,Galileo) and the dual system (BeiDou+GLONASS,BeiDou+Galileo,GLONASS+Galileo). Visible satellites increased by 60%~120% and 10%~110% respectively.In addition,with a cut-off elevation angle greater than 30°,the DOP values of single-system and dual-system are large and fluctuating.The positioning reliability and epoch availability are significantly reduced,while the BeiDou+GLONASS+Galileo combination can still get better positioning results.This has practical application value under the harsh conditions of building-intensive areas,mountains and satellite shelters.

Key words: BeiDou+GLONASS+Galileo, multi-system combination, SPP, number of visible satellites and DOP values, positioning accuracy

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