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1.哈尔滨工程大学智能科学与工程学院,黑龙江 哈尔滨,150001
2.中国船舶航海保障技术实验室,天津,300131
3.中国舰船研究设计中心,湖北 武汉,430064
Received:22 November 2023,
Published:05 July 2025
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刘子奇,臧欣蕊,贾春,等.固定基线约束的低成本GNSS测向方法[J].武汉大学学报(信息科学版),2025,50(7):1321-1327.
LIU Ziqi,ZANG Xinrui,JIA Chun,et al.Low-Cost GNSS Heading Determination with Fixed Baseline Constraints[J].Geomatics and Information Science of Wuhan University,2025,50(7):1321-1327.
刘子奇,臧欣蕊,贾春,等.固定基线约束的低成本GNSS测向方法[J].武汉大学学报(信息科学版),2025,50(7):1321-1327. DOI:,10.13203/j.whugis20220572
LIU Ziqi,ZANG Xinrui,JIA Chun,et al.Low-Cost GNSS Heading Determination with Fixed Baseline Constraints[J].Geomatics and Information Science of Wuhan University,2025,50(7):1321-1327. DOI:,10.13203/j.whugis20220572
全球导航卫星系统(global navigation satellite system,GNSS)测向是导航领域提供航向信息的重要手段。高性能GNSS测向产品精度可达0.20°/m,满足多数应用领域的需求,但其高昂的万元级成本阻碍了大众市场推广。而低成本GNSS接收机的观测量冗余度与质量均弱于高性能GNSS接收机,导致其测向精度与可靠性易受复杂环境影响。为提升低成本GNSS测向性能,提出了固定基线约束的低成本GNSS测向方法。该方法利用双天线间固定基线约束信息,基于几何基线后验方差-协方差信息构建实时动态检验阈值,可有效增加整周模糊度解算成功率,从而提升低成本GNSS测向的精度与可靠性。通过实测动态数据对所提方法进行测试,与传统方法对比,整周模糊度固定成功率提升了7.4%,达到了0.40°/m的测向精度。
Objectives
2
Global navigation satellite system (GNSS) heading determination is an important technology in the field of navigation. At present
the accuracy of high-performance GNSS heading determination receivers can reach 0.2°/m
which can satisfy the requirements of most applications
but the cost of 10 000 yuan hinders the mass market promotion. However
the observation redundancy and quality of the low-cost GNSS receivers are weaker than those of the high-performance GNSS receiver
which makes the heading determination accuracy and reliability of the low-cost GNSS receiver vulnerable to complex environments.
Methods
2
In order to improve the performance of low-cost GNSS heading determination
a low-cost GNSS heading determination method with fixed baseline constraints is proposed. The method deploys fixed baseline constraints between the dual antennas and constructs real-time dynamic detection thresholds based on a posteriori variance-covariance of geometric baseline
which can effectively increase the success rate of integer ambiguity resolution
thus improving the accuracy and reliability of low-cost GNSS heading determination.
Results
2
The proposed method was tested with real kinematic data. Compared to the traditional methods
the success rate of the integer ambiguity resolution was improved by 7.4%
and the heading determination accuracy of 0.40°/m was achieved.
Conclusions
2
It is shown that the low-cost GNSS vectoring method with fixed baseline constraints can effectively increase the success rate of whole-period ambiguity solution and improve the accuracy and reliability of low-cost GNSS vectoring.
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