基于坐标约束的精密单点定位授时算法  

A Timing Algorithm of Precise Point Positioning Based on Coordinate Constraint

作　　者：于合理[1,2] 郝金明[1,2] 田英国[1] 刘伟平[1] 

机构地区：[1]解放军信息工程大学导航与空天目标工程学院,河南郑州450001 [2]北斗导航应用技术河南省协同创新中心,河南郑州450001

出　　处：《海洋测绘》2017年第3期25-28,共4页Hydrographic Surveying and Charting

基　　金：中国第二代卫星导航系统重大专项课题(GFZX0301040308-03;GFZX0301040101ZX04;GFZX0301040107);地理信息工程国家重点实验室开放研究基金(SKLGIE2015-M-1-6)

摘　　要：针对传统PPP授时算法收敛性速度慢的问题,提出了一种基于坐标约束的PPP授时算法。该算法通过利用先验坐标信息构建坐标约束方程来对传统授时算法进行改进,进而提高授时结果的收敛速度。利用IGS站观测数据进行实验分析,结果表明,附加先验坐标信息进行约束后,静态条件下可以显著提高授时结果的收敛速度;静态模拟动态条件下不仅能够提高收敛速度,还能提高授时的精度和稳定性。In order to solve the convergence problem of the traditional PPP timing algorithm,a timing algorithm of precise point positioning based on coordinate constraint is proposed. The coordinate constraint equation is constructed to improve the traditional timing algorithm by using the priori coordinate information,and accelerate the convergence speed of the timing results.The Experiment results based on the real observation of IGS stations showthat the convergence speed of the timing results can be significantly improved under the static conditions.Under the condition of the static simulation of dynamic,not only the convergence speed of the timing results,but also the timing accuracy and stability can be improved.

关 键 词：精密单点定位 先验坐标信息 授时 约束方程 收敛速度 

分 类 号：P228.4[天文地球—大地测量学与测量工程]