摘要
针对3种全球卫星导航系统(GNSS)信号多路径误差削弱算法,包括恒星日滤波模型、等分辨率多路径半天球模型和等面积多路径半天球模型在不同环境中的适用性和削弱性问题,利用2组不同实验环境下的全球定位系统(GPS)数据,分析3种多路径误差模型的表现。结果显示,在开阔环境下,3种模型结果较一致,相比于原始的定位模型,3种多路径误差模型的定位精度均显著提高;在抗干扰能力较弱的单频低成本接收机所在的云南省丽江市高速公路变形监测环境下,恒星日滤波模型的定位精度显著高于等分辨率和等面积多路径半天球模型结果;相比于等分辨率多路径半天球模型,恒星日滤波定位残差的均方根误差(RMSE)在东、北和高程方向分别平均减少0.91 mm、1.51 mm和2.95 mm,对应的平均减少率分别为18.04%、20.91%和21.55%;相比于等面积多路径半天球模型,恒星日滤波的RMSE在东、北和高程方向分别平均减少1.09 mm、1.83 mm和3.25 mm,对应的平均减少率分别为21.65%、25.47%和23.74%。结果可为后续大规模GNSS测站多路径效应修正模型的选择提供参考。
Aiming at the applicability and attenuation problems of three global navigation satellite system(GNSS)signal multipath error attenuation algorithms,including the sidereal filtering model,fixed resolution multipath hemispherical map model and congruent cell multipath hemispherical map model,in different environments,the paper used two sets of global positioning system(GPS)data from different experimental environments to analyze in detail the performance of the three multipath error models.Results showed that in open sky environment,the outcomes of the three models would be relatively consistent;compared to the original positioning model,the positioning accuracy of sidereal filtering,fixed resolution and congruent cell multipath hemispherical map models could be significantly improved;in the highway deformation monitoring environment with a singlefreque ncy low-cost receiver,which has weake r anti-interference capability,the positioning accuracy of the sidereal filtering model would be significantly higher than that of the fixed resolution and congruent cell multipath hemispherical models;compared to the fixed resolution multipath hemispherical map model,the positioning residual root mean square error(RMSE)of the sidereal filtering model could be reduced by an average of 0.91 mm,1.51 mm and 2.95 mm in the east,north,and height directions,respectively,with corresponding average reduction rates of 18.04%,20.91%and 21.55%;compared to the congruent cell multipath hemispherical map model,the RMSE of the sidereal filtering model could be reduced by an average of 1.09 mm,1.83 mm and 3.25 mm in the east,north,and height directions,respectively,with corresponding average reduction rates of 21.65%,25.47%and 23.74%.These results could provide a reference for the selection of multipath effect correction models for large-scale GNSS monitoring stations in the future.
作者
周厚香
王小亚
周莹莹
ZHOU Houxiang;WANG XiaoYa;ZHOU Yingying(College of Surveying and GeoInformatics,Tongji University,Shanghai 200092,China;Shanghai Astronomical Observatory,Chinese Academy of Sciences,Shanghai 200030,China;University of Chinese Academy of Sciences,Beijing 100049,China;Shanghai Key Laboratory of Space Navigation and Positioning Techniques,Shanghai 200030,China;Department of Training Management,Chinese Armed Police Force Command College,Tianjin 300171,China)
出处
《导航定位学报》
北大核心
2025年第4期30-38,共9页
Journal of Navigation and Positioning
基金
国家自然科学基金项目(12373076,11973073)。
关键词
多路径误差
恒星日滤波
等分辨率多路径半天球模型
等面积多路径半天球模型
multipath errors
sidereal filtering
fixed resolution multipath hemispherical map model
congruent cell multipath hemispherical map model
