北斗低成本接收机单频PPP海上定位性能分析  

Analysis of single-frequency PPP seaborne positioning performance for BDS low-cost receivers

作　　者：刘一 刘敏 边少锋 翟国君 周威 LIU Yi;LIU Ming;BIAN Shaofeng;ZHAI Guojun;ZHOU Wei(College of Electrical Engineering,Naval University of Engineering,Wuhan 430033,China;91001 Troops,Beijing 100830,China;Key Laboratory of Geological Survey and Evaluation of Ministry of Education,China University of Geosciences,Wuhan 430074,China)

机构地区：[1]海军工程大学电气工程学院,湖北武汉430033 [2]91001部队,北京100830 [3]中国地质大学(武汉)地质探测与评估教育部重点实验室,湖北武汉430074

出　　处：《海洋测绘》2024年第3期68-72,82,共6页Hydrographic Surveying and Charting

基　　金：国家自然科学基金(41971416,41974005,42174051);海军工程大学研究生创新基金(DQCXJJ2021004,DQCXJJ2021005);海军工程大学自主立项项目(2019055)。

摘　　要：为评估北斗低成本接收机在海洋动态环境中的定位性能,首先从原始观测方程出发,推导出融合BDS-2和BDS-3的单频精密单点定位模型;其次采用PPK解动态约束位置参数和双向滤波的方法,估计得到观测值无偏后验残差,并基于后验残差分析了低成本接收机和测量型接收机在海上的观测数据质量,最后基于实时和事后精密产品,分析了低成本接收机SF-PPP的定位性能。实验表明:低成本接收机的观测噪声较大,相位和伪距观测噪声为测量型接收机的11.9倍和5.6倍。低成本接收机实时水平和垂直定位精度优于0.3 m和0.5 m,收敛时间优于40 min。置信度为95%时,后处理水平和垂直定位精度为0.219 m和0.430 m。结果表明:低成本接收机在海洋动态环境下定位精度为亚米级,可满足部分高精度海洋应用定位需求。To evaluate the performance of the low-cost BDS receiver on positioning within the marine environment,this paper first derives a single-frequency precise point positioning(SF-PPP)model combining BDS-2 and BDS-3 from the raw observation equations.Then,through the comparison of the posterior residuals,analyzing the data quality of the dynamic GNSS observations above the sea level for low-cost and geodetic receivers,respectively.Finally,the real-time and post-processing precision products are applied to evaluate the positioning accuracy of the SF-PPP model using a low-cost receiver.The experimental results show that the noise of the carrier-phase and pseudorange observations for a low-cost receiver is more than 11 and 5 times that of the geodetic receiver,whose data quality is significantly poor.The real-time SF-PPP method for the low-cost receiver is less than 0.3 m for the horizontal positioning,0.5 m for the vertical positioning,and 40 min for the convergence time.The accuracy of the post-processing horizontal and vertical positioning up to 0.219 and 0.430 m within 95% confidence intervals,respectively.Therefore,the SF-PPP method using the low-cost receiver can be used to measure the submeter-level positioning,which is available for accurate positioning applications on sea level.

关 键 词：北斗卫星导航系统 单频精密单点定位 低成本接收机 数据质量 定位性能 

分 类 号：P228.4[天文地球—大地测量学与测量工程]