全球定位系统2025，Vol.50Issue(3)：67-81,15.DOI:10.12265/j.gnss.2024216
GNSS TDCP测速高度角随机模型初步研究
Preliminary research on elevation-dependent stochastic model for GNSS velocity determination based on TDCP method
摘要
Abstract
Velocity is a crucial parameter for describing and characterising the motion state of a carrier.Consequently,numerous applications and research projects have set high standards for the accuracy of velocity determination.GNSS velocity determination technology has become an important means of speed measurement by virtue of its high accuracy and efficiency,and has been widely used.In the related research of GNSS velocity determination,there are more researches on velocity determination algorithm and accuracy evaluation,but the research on velocity determination stochastic model is almost blank,and the application still mostly uses the stochastic model and parameters of positioning.In this paper,based on the single-point time-differenced carrier phase(TDCP)velocity determination algorithm and the least squares estimation,we study the construction method of elevation-dependent stochastic model of the GNSS velocity determination,and establish the dual-frequency carrier phase velocity determination elevation-dependent stochastic model of the GPS/BDS/Galileo three systems,which takes into account of the type of receivers and the orbit of the navigation satellites.Tests of the TDCP velocity determination elevation-dependent stochastic model show that the receiver type and navigation satellite orbit are important factors affecting the stochastic model,and the constructed stochastic model for velocity determination improves the accuracy of joint multi-system velocity determination.Using the newly constructed elevation-dependent stochastic model,the accuracy of dual-system and triple-system velocity determination of GPS,BDS and Galileo can be improved by up to 5.67％,5.81％,5.21％and 9.58％,respectively.关键词
GNSS测速技术/单点载波相位时间差分(TDCP)测速/高度角随机模型/接收机类型/卫星轨道类型Key words
GNSS velocity determination technology/single-point TDCP velocity determination/elevation-dependent stochastic model/the type of receiver/the type of satellite orbit分类
天文与地球科学引用本文复制引用
李文龙,郭爱智,张成枫,周峰,马文静,徐紫伊..GNSS TDCP测速高度角随机模型初步研究[J].全球定位系统,2025,50(3):67-81,15.基金项目
2022年国家重点实验室自主部署项目(S22L620104) （S22L620104）
湖北省自然科学基金(2023AFB948) （2023AFB948）
