测绘通报 ›› 2021, Vol. 0 ›› Issue (1): 59-65,98.doi: 10.13474/j.cnki.11-2246.2021.0011

• 学术研究 • 上一篇    下一篇

北斗三号全球卫星导航系统的广播星历精度评估

王朝辉1, 马下平1,2, 严丽3, 鲁铁定3, 赵庆志1   

  1. 1. 西安科技大学测绘科学与技术学院, 陕西 西安 710054;
    2. 上海市空间导航与定位技术重点实验室, 上海 200030;
    3. 东华理工大学测绘工程学院, 江西 南昌 330013
  • 收稿日期:2020-03-12 修回日期:2020-10-13 发布日期:2021-02-08
  • 通讯作者: 马下平。E-mail:celiang0321@163.com
  • 作者简介:王朝辉(1994-),男,硕士,研究方向为GNSS数据处理。E-mail:hey_wangzhaohui@163.com
  • 基金资助:
    国家自然科学基金(41904171;42061077);江西省自然科学基金(20202BAB214029);江西省教育厅科学技术研究项目(GJJ18042121)

Accuracy assessment of BDS-3 broadcast ephemeris

WANG Zhaohui1, MA Xiaping1,2, YAN Li3, LU Tieding3, ZHAO Qingzhi1   

  1. 1. School of Geomatics, Xi'an University of Science and Technology, Xi'an 710054, China;
    2. Shanghai Key Laboratory of Space Navigation and Positioning Techniques, Shanghai 200030, China;
    3. Faculty of Geomatics, East China University of Technology, Nanchang 330013, China
  • Received:2020-03-12 Revised:2020-10-13 Published:2021-02-08

摘要: 为了及时评估北斗三号全球卫星导航系统(BDS-3)广播星历的精度,本文基于2018年3月10—22日和2019年7月2—14日的BDS-2、BDS-3广播星历,以及武汉大学发布的精密星历数据,从北斗卫星的星历误差、轨道误差和空间信号测距精度(SISRE)3个方面进行了全面比较与分析。结果表明:BDS-3的广播星历星历误差的RMSE基本优于1.5 m,BDS-2的GEO、IGSO和MEO卫星的广播卫星星历误差的RMSE分别为3.0、3.0、2.0 m;BDS-3的轨道误差RMSE基本优于1.0 m,其中径向R方向的精度高于切向T和法线N方向,分别为0.1、1.0、0.5 m,BDS-2在R、T、N 3个方向上的精度分别为1、3、3 m;BDS-3广播星历SISRE的RMSE基本优于0.25 m,BDS-2的GEO、IGSO和MEO卫星的SISRE分别优于0.5、2.0、0.5 m。本文的结果整体上反映出BDS-3信号稳定且精度逐渐提升。

关键词: BDS-3, 广播星历, 空间信号测距误差, 轨道精度, 评估

Abstract: In order to evaluate the accuracy of BeiDou-3 global navigation satellite system (BDS-3), broadcast ephemeris timely, this paper makes a comprehensive comparison and analysis of ephemeris error, orbital error and SISRE, signal in space range error. The data of broadcast ephemeris and precise ephemeris is released by Wuhan University of BDS-2 and BDS-3 from March 10 to March 22, 2018 and July 2 to July 14, 2019. The results show that the RMSE of the broadcast ephemeris of BDS-3 are basically better than 1.5 m, and the RMSE of BDS-2 GEO, IGSO and MEO satellites are less than respectively 3.0, 3.0, 2.0 m. The orbit errors of BDS-3 are basically better than 1.0 m, and the errors in the R direction are superior than the T and N directions, respectively 0.1, 1.0, 0.5 m. The orbit errors of the BDS-2 in the three directions of the radial R, T and N are 1, 3, 3 m. The SISRE of BDS-3 are better than 0.25 m, and SISRE of BDS-2 GEO, IGSO and MEO satellites are better than 0.5, 2.0, 0.5 m respectively. The results of this paper reflect that the BDS-3 signal is stable and its accuracy is improved.

Key words: BDS-3, broadcast ephemeris, SISRE, orbital accuracy, evaluation

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