测绘通报 ›› 2023, Vol. 0 ›› Issue (12): 164-168.doi: 10.13474/j.cnki.11-2246.2023.0378

• 技术交流 • 上一篇    

无频间钟偏差改正的BDS-2三频非组合PPP随机模型优化

周长江1, 余海锋1, 王林伟1, 雷云平2, 岳彩亚3   

  1. 1. 中水北方勘测设计研究有限责任公司, 天津 300222;
    2. 山西省国土空间调查规划中心, 山西 太原 030000;
    3. 聊城大学地理与环境学院, 山东 聊城 252000
  • 收稿日期:2023-04-27 发布日期:2024-01-08
  • 通讯作者: 岳彩亚。E-mail:yuecaiya@lcu.edu.cn
  • 作者简介:周长江(1987-),男,硕士,工程师,主要研究方向为GNSS精密定位及智慧水利应用。E-mail:zhou_cj@bidr.com.cn
  • 基金资助:
    国家级大学省创新训练项目(202210447009);城市空间信息工程北京市重点试验室经费(20220120)

Optimization of the BDS-2 triple-frequency un-combined PPP random model without inter-frequency clock deviation correction

ZHOU Changjiang1, YU Haifeng1, WANG Linwei1, LEI Yunping2, YUE Caiya3   

  1. 1. Zhongshui North Survey and Design Research Co., Ltd., Tianjin 300222, China;
    2. Land Space Surveying and Planning Center of Shanxi Province, Taiyuan 030000, China;
    3. School of Geography and Environment, Liaocheng University, Liaocheng 252000, China
  • Received:2023-04-27 Published:2024-01-08

摘要: 针对北斗二号卫星导航系统(BDS-2)频间钟偏差(IFCB)导致多频精密单点定位(PPP)解算结果产生系统性偏差的问题,本文提出了一种适用于BDS-2无IFCB改正的三频非组合PPP随机模型优化方案,通过亚太地区分布的30个监测站数据客观评估和分析了最优随机模型建立方法。结果表明,当无IFCB改正时,BDS-2第三频率载波相位观测值方差应被放大为原始方差的2.0~4.0倍。为了进一步验证该随机模型的可用性,以放大3.0倍为例,实施了额外6个连续测站BDS-2三频观测数据非组合PPP静态和动态解。定位精度和收敛时间方面均表明,当将第三频频率载波相位观测值方差放大3.0倍后与采用真实IFCB改正具有同等性能改善效果,且均优于未顾及IFCB影响的BDS-2三频非组合PPP。

关键词: BDS-2, 频间钟偏差, 精密单点定位, 随机模型, 非组合PPP

Abstract: In view of the inter-frequency clock deviation (IFCB) of BeiDou-2 Navigation Satellite System (BDS-2) will lead to systematic deviation in multi-frequency precision point positioning (PPP), an optimization scheme for a triple-frequency un-combined PPP stochastic model suitable for BDS-2 without IFCB correction is presented. The method of optimal stochastic model building is objectively evaluated and analyzed through data from 30 monitoring stations distributed in the Asia-Pacific region. The results show that the BDS-2 third frequency carrier phase observed variance should be amplified to 2.0 to 4.0 times of the original variance. In order to further verify the usability of this stochastic model, the static and dynamic solutions are implemented for six additional stations. Both the positioning accuracy and convergence time shown the same effect as the real IFCB correction, and it is better than the BDS-2 triple-frequency un-combined PPP which does not take into account the influence of IFCB.

Key words: BDS-2, IFCB, precise point positioning, random model, un-combined PPP

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