GPS实时精密卫星钟差估计及其精度分析  

GPS Real - Time Precise Satellite Clock Offset Estimation and Its Accuracy Analysis

作　　者：龚婷婷 GONG Ting-ting(School of Geomatics,Anhui University of Science and Technology,Huainan 232001 China)

机构地区：[1]安徽理工大学空间信息与测绘工程学院,安徽淮南232001

出　　处：《科技创新与生产力》2020年第10期50-53,共4页Sci-tech Innovation and Productivity

摘　　要：为了解决目前研究多针对非差模型解算而对于历元间差分模型解算结果还比较少的问题,本文通过构建历元间差分模型,基于IGS预报轨道的钟差产品,实现了对GPS精密卫星钟差估计。选取全球均匀分布的100个IGS跟踪站观测数据,通过仿实时精密卫星钟差解算实验,结果表明:采用本文估计得到的钟差产品同IGS事后钟差产品的二次差的标准差优于0.25 ns,平均精度为0.11 ns;静态和动态精密单点定位精度分别优于3 cm和10 cm,可满足用户分米级甚至厘米级的定位需求。In order to solve the problem that the current research is mostly focused on the non-differential model solution,but the solution result of the inter-epoch differential model is relatively less,this paper constructs the inter-epoch differential model,and based on the clock offset product of IGS prediction orbit,realizes the estimation of GPS precise satellite clock offset.Based on the observation data of 100 IGS tracking stations uniformly distributed in the world,the simulated real-time precise satellite clock offset solution experiment is carried out.The results show that the standard deviation of the second-order difference between the clock offset products and the IGS post clock offset products is better than 0.25 ns and the average accuracy is 0.11 ns.The static and dynamic precise point positioning accuracy are better than 3 cm and 10 cm respectively,which can meet the user's positioning requirements of decimeter level or even centimeter level.

关 键 词：精密卫星钟差 精度分析 历元间差分模型 精密单点定位 

分 类 号：P228[天文地球—大地测量学与测量工程] V474.26[天文地球—测绘科学与技术]