BDS-3 PPP-B2b精密轨道辅助非差非组合PPP-RTK

doi:10.11947/j.AGCS.2023.20220259

测绘学报 ›› 2023, Vol. 52 ›› Issue (9): 1449-1459.doi: 10.11947/j.AGCS.2023.20220259

BDS-3 PPP-B2b精密轨道辅助非差非组合PPP-RTK

查九平^1,2, 张宝成¹, 刘腾¹, 张啸², 侯鹏宇¹, 袁运斌¹, 李子申³

1. 中国科学院精密测量科学与技术创新研究院大地测量与地球动力学国家重点实验室, 湖北武汉 430071;
2. 广州市城市规划勘测设计研究院, 广东广州 510060;
3. 中国科学院空天信息创新研究院, 北京 100094

收稿日期:2022-04-22 修回日期:2023-05-04 发布日期:2023-10-12
通讯作者: 张宝成 E-mail:b.zhang@whigg.ac.cn
作者简介:查九平(1991-),男,博士,研究方向为GNSS精密定位理论及其应用。E-mail:zhajp@apm.ac.cn
基金资助:
国家自然科学基金(42022025);中科院科研仪器设备研制项目(YJKYYQ20190063)

Undifferenced and uncombined PPP-RTK aided by BDS-3 PPP-B2b precise orbits

ZHA Jiuping^1,2, ZHANG Baocheng¹, LIU Teng¹, ZHANG Xiao², HOU Pengyu¹, YUAN Yunbin¹, LI Zishen³

1. State Key Laboratory of Geodesy and Earth's Dynamics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China;
2. Guangzhou Urban Planning Design Survey Research Institute, Guangzhou 510060, China;
3. Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China

Received:2022-04-22 Revised:2023-05-04 Published:2023-10-12
Supported by:
The National Natural Science Foundation of China (No. 42022025);The Scientific Instrument Developing Project of the Chinese Academy of Sciences (No. YJKYYQ20190063)

摘要/Abstract

摘要： BDS-3通过其高轨道卫星的B2b信号向亚太地区用户免费提供了标准精密单点定位服务,但PPP近半小时的收敛时间和分米级的实时定位精度不利于其后续应用推广。因此,本文提出了融合PPP-B2b精密卫星轨道产品与区域稀疏参考站观测数据的增强定位方法,即基于PPP-B2b的非差非组合精密单点实时动态定位技术,并采用站间单差电离层伪观测值对其进行约束,以实现电离层延迟等参数的严密估计。此外,本文还重点设计了区域电离层斜延迟及其精度信息的单星实时建模方案,有效压缩播发数据量的同时提高了PPP-RTK的应用性能。在此基础上,利用京津区域参考网对上述方法进行了近实时验证。结果表明:本文方法提供的电离层斜延迟修正精度可达2.2 cm(BDS-3)/2.4 cm(GPS);超95% BDS-3+GPS定位样本的绝对误差可在2 s内收敛到水平2 cm与垂直5 cm,而且定位误差收敛后可实现水平毫米级与垂直厘米级的定位精度。

关键词: BDS-3, PPP-B2b, 非差非组合, PPP-RTK, 电离层斜延迟, 单星建模

Abstract: Standard precise point positioning (PPP) service has been provided to users in Asia-Pacific region for free by the BDS-3 through B2b signals of BDS-3's geostationary earth orbit satellites (PPP-B2b), but its long convergence time of approximately 30 minutes and decimeter-level positioning accuracy in real-time processing are not conducive to its subsequent application and promotion. Therefore, this study proposes an enhanced positioning method that integrates precise satellite orbit products of PPP-B2b and observations from the regional sparse reference network, namely the undifferenced and uncombined PPP real-time kinematic (UDUC PPP-RTK) based on the PPP-B2b, and it is further constrained by the between-station single-difference ionospheric delay pseudo-observations to achieve a tight estimation of parameters such as ionospheric delay parameters. Besides, the single-satellite real-time modeling schemes of regional ionospheric slant delays and their accuracy information are emphasis designed in this study, which effectively compresses the amount of broadcast data while improves the application performance of PPP-RTK. Then, some near-real-time experiments have been carried out based on the Beijing-Tianjin sparse reference network to verify above theoretical method. The results show that the correction accuracy of the ionospheric slant delays calculated by the proposed method are 2.2 cm for BDS-3 and 2.4 cm for GPS; the absolute positioning errors of BDS-3+GPS converge to 2 cm (horizontal) and 5 cm (vertical) within 2 s for above 95% of arcs; and the millimeter- (horizontal) and centimeter-level (vertical) positioning accuracy can be achieved after convergence of positioning errors.

Key words: BDS-3, PPP-B2b, undifferenced and uncombined, PPP-RTK, ionospheric slant delay, single-satellite modeling

中图分类号:

P228

查九平, 张宝成, 刘腾, 张啸, 侯鹏宇, 袁运斌, 李子申. BDS-3 PPP-B2b精密轨道辅助非差非组合PPP-RTK[J]. 测绘学报, 2023, 52(9): 1449-1459.

ZHA Jiuping, ZHANG Baocheng, LIU Teng, ZHANG Xiao, HOU Pengyu, YUAN Yunbin, LI Zishen. Undifferenced and uncombined PPP-RTK aided by BDS-3 PPP-B2b precise orbits[J]. Acta Geodaetica et Cartographica Sinica, 2023, 52(9): 1449-1459.

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BDS-3 PPP-B2b精密轨道辅助非差非组合PPP-RTK

Undifferenced and uncombined PPP-RTK aided by BDS-3 PPP-B2b precise orbits

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