测绘学报 ›› 2019, Vol. 48 ›› Issue (7): 831-839.doi: 10.11947/j.AGCS.2019.20180560

• 大地测量学与导航 • 上一篇    下一篇

北斗三号卫星两种定轨模式精度比较分析

杨宇飞1,2, 杨元喜3,4, 胡小工5, 唐成盼5, 赵立谦5, 徐君毅2   

  1. 1. 信息工程大学, 河南 郑州 450001;
    2. 北京卫星导航中心, 北京 100094;
    3. 地理信息工程国家重点实验室, 陕西 西安 710054;
    4. 西安测绘研究所, 陕西 西安 710054;
    5. 中国科学院上海天文台, 上海 200030
  • 收稿日期:2018-12-04 修回日期:2019-05-15 出版日期:2019-07-20 发布日期:2019-07-26
  • 作者简介:杨宇飞(1992-),男,硕士,工程师,研究方向为GNSS精密定轨。
  • 基金资助:
    国家重点研发计划(2016YFB0501700;2016YFB0501701);国家自然科学基金(41374019)

Comparison and analysis of two orbit determination methods for BDS-3 satellites

YANG Yufei1,2, YANG Yuanxi3,4, HU Xiaogong5, TANG Chengpan5, ZHAO Liqian5, XU Junyi2   

  1. 1. Information Engineering University, Zhengzhou 450001, China;
    2. Beijing Satellite Navigation Center, Beijing 100094, China;
    3. National Key Laboratory of Geo-information Engineering, Xi'an 710054, China;
    4. Xi'an Research Institute of Surveying and Mapping, Xi'an 710054, China;
    5. Shanghai Astronomical Observatory, Shanghai 200030, China
  • Received:2018-12-04 Revised:2019-05-15 Online:2019-07-20 Published:2019-07-26
  • Supported by:
    The National Key Research and Development Project (Nos. 2016YFB0501700;2016YFB0501701);The National Natural Science Foundation of China (No. 41374019)

摘要: 北斗全球卫星导航系统(BDS-3)已经于2018年年底建成基本系统,并计划于2020年建成完整系统,而精确的卫星轨道是实现高性能全球服务的前提。本文基于北斗三号基本系统的18颗中圆轨道(MEO)卫星,评估了北斗三号卫星星间链路的测量噪声与测距精度,利用中国境内12个区域监测站的星地观测和星间链路观测,进行了联合卫星轨道测定试验,并与单纯区域监测站观测定轨结果进行了比较,分析了两种定轨模式重叠弧段轨道误差、轨道预报精度和激光检核精度。结果表明:北斗三号卫星的星间链路测量噪声为2.9 cm,测距精度约为4.4 cm;仅采用区域测站定轨,重叠弧段三维位置误差RMS为66.7 cm,加入星间链路后可降低至15.4 cm,提高了76.9%,24 h轨道预报位置精度也由114.1 cm提升至20.3 cm,提升了83.2%,激光检核径向精度为8.4 cm左右,明显优于北斗二号卫星轨道精度。

关键词: BDS-3, 星间链路, 重叠弧段精度, 轨道预报, 激光检核

Abstract: The basic system of BeiDou-3 (or simply called BDS-3) navigation satellite system has been completed by the end of 2018, and the whole system is planned to be completed in 2020. The precise orbit is the pre-condition of high-performance global service. The observation noise and ranging accuracy of Inter-satellite links (ISL) were analyzed based on the basic constellation of 18 satellites. The joint orbit determination experiment of the basic system was conducted based on both 12 regional stations (RS) within Chinese mainland and ISLs, and the results were compared with orbits only based on regional stations. The overlapping orbit difference (OOD), orbit prediction accuracy and satellite laser ranging (SLR) validation accuracy of both methods were analyzed. The results show that the observation noise is about 2.9 cm and ranging accuracy is about 4.4 cm. The 3D position RMS (root mean square) of ODDs for RS mode is about 66.7 cm. The accuracy of 3D position is improved by 76.9% after ISL observations are added. The 3D position accuracy of 24-hour orbit prediction can also be decreased from 114 to 20.3 cm, improved by 83.2%. The SLR validation accuracy of BDS-3 satellite orbit is about 8.4 cm, which is much better than that of BDS-2.

Key words: BDS-3, inter-satellite link, overlapping orbit difference, orbit prediction, SLR validation

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