基于Hatch滤波的改进矩阵变换法在BDS多频模糊度解算中的应用  

Application of improved matrix transformation method based on Hatch filter in BDS multi frequency ambiguity resolution

作　　者：刘国超[1,2,3] 姜凯华 黄文嘉[1,2,3] 张莹 Liu Guochao;Jiang Kaihua;Huang Wenjia;Zhang Ying(Guangzhou Urban Planning&Design Survey Research Institute,Guangzhou 510060,China;Collaborative Innovation Center for Natural Resources Planning and Marine Technology for Guangzhou,Guangzhou 510060,China;Guangdong Enterprise Key Laboratory for Urban Sensing,Monitoring and Early Warning,Guangzhou 510060,China)

机构地区：[1]广州市城市规划勘测设计研究院有限公司,广州510060 [2]广州市资源规划和海洋科技协同创新中心,广州510060 [3]广东省城市感知与监测预警企业重点实验室,广州510060

出　　处：《工程勘察》2024年第7期49-54,共6页Geotechnical Investigation & Surveying

基　　金：广州市资源规划和海洋科技协同创新中心项目(2023B04J0301,2023B04J0326);广东省城市感知与监测预警企业重点实验室基金项目(2020B121202019);广州市城市规划勘测设计研究院有限公司科技基金项目(RDI2230201002,RDI2220204118)资助.

摘　　要：长基线条件下,空间相关性弱,电离层延迟残差和噪声影响变大,致使矩阵变换法模糊度解算过程中,窄巷组合受噪声影响大,单历元模糊度解算成功率低。因此,削弱电离层残差及噪声影响可以一定程度提高模糊度解算成功率。本文在分析矩阵变换算法基础上,利用Hatch滤波有效抑制伪距测量噪声和多径效应特点,结合弱电离层、低噪声的载波组合,通过相位平滑伪距代替组合伪距值参与解算,从而削弱电离层残差及观测噪声影响。通过实测数据分析,本文算法可有效提高矩阵变换法模糊度解算成功率。Under the condition of long baseline,the ionospheric delay and tropospheric delay cannot be eliminated well due to the weak spatial correlation between stations.As a result,the narrow lane combination is greatly affected by noise,and the success rate of single epoch ambiguity resolution is low.Therefore,weakening the ionospheric residual and noise can improve the success rate of ambiguity resolution to a certain extent.Based on the analysis of matrix transformation algorithm,this paper uses Hatch filter to effectively suppress the pseudo range measurement noise and multipath effect,combines the carrier combination of weak ionosphere and low noise,through phase smoothing pseudo range to replace the combined pseudo range value to participate in the solution,so as to weaken the ionospheric residual and the influence of observation noises.Through the analysis of measured data,this algorithm can effectively improve the success rate of ambiguity resolution of matrix transformation method.

关 键 词：模糊度 BDS HATCH滤波 矩阵变换 载波相位平滑伪距 

分 类 号：P228[天文地球—大地测量学与测量工程]