测绘通报 ›› 2021, Vol. 0 ›› Issue (3): 23-27.doi: 10.13474/j.cnki.11-2246.2021.0072

• 北斗三号定位与导航 • 上一篇    下一篇

不同截止高度角下BDS-3 SPP精度分析

朱玉香1, 陈永贵1, 安春华2   

  1. 1. 河南测绘职业学院, 河南 郑州 451464;
    2. 河南省科学院地理研究所, 河南 郑州 450052
  • 收稿日期:2020-09-09 出版日期:2021-03-25 发布日期:2021-04-02
  • 作者简介:朱玉香(1982—),女,硕士,讲师,研究方向为测绘工程等。E-mail:1569103004@qq.com
  • 基金资助:
    河南省高等学校重点科研项目(20B170002);河南省高校人文社会科学研究项目(2021-ZZJH-035)

SPP accuracy analysis of BDS-3 under different masking angles

ZHU Yuxiang1, CHEN Yonggui1, AN Chunhua2   

  1. 1. Henan Collage of Surveying and Mapping, Zhengzhou 451464, China;
    2. Institute of Geography, Henan Academy of Sciences, Zhengzhou 450052, China
  • Received:2020-09-09 Online:2021-03-25 Published:2021-04-02

摘要: 针对卫星可见数与历元可用率较低情况下的BDS-3定位性能,本文基于MEGX跟踪站BDS-3与GPS实测数据,分析了不同高度角(10°、20°、30°、40°)下BDS-3卫星B1I、B1C、B2a、B3I,以及GPS系统L1频率的单点定位(SPP)精度。研究发现,BDS-3平均卫星可见数与卫星空间几何构型优于GPS,且随着高度角的增加呈线性变化。BDS-3的4个频率的SPP精度随着高度角的增加呈先增加后降低的趋势,高度角为20°时,定位精度最高,高度角达到40°时,定位精度最低,且历元可用率也最低;但B1I和B3I历元可用率仍大于90%,而B1C和B2a历元可用率大于70%;不论是SPP定位精度还是历元可用率,均优于GPS系统L1频率。

关键词: BDS-3, SPP, 不同高度角, 历元可用率

Abstract: Aiming at the BDS-3 positioning performance under the condition of low satellite visibility and epoch availability, this paper analyzes different altitude angles (10°, 20°, 30°, BDS-3 and GPS measured data from MEGX tracking station). 40°) SPP positioning accuracy of BDS-3 satellites B1I, B1C, B2a, B3I and GPS system L1 frequency. It is found through research that the average number of visible satellites and satellite spatial geometry of BDS-3 are better than GPS, and it changes linearly with the increase of the altitude angle. The SPP positioning accuracy of the four frequencies of BDS-3 increases first and then decreases with the increase of the altitude angle. When the altitude angle is 20°, the positioning accuracy is the highest. When the altitude angle reaches 40°, the positioning accuracy is the lowest, and the epoch availability rate is also the lowest. But the availability rate of the B1I and B3I epochs is still greater than 90%, while the availability rate of the B1C and B2a epochs is greater than 70%. Both the SPP positioning accuracy and the epoch availability are better than the GPS system L1 frequency.

Key words: BDS-3, SPP, different elevation angles, epoch availability rate

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