非组合精密单点定位算法精密授时的可行性研究  

Feasibility of Precise Timing with Uncombined PPP

作　　者：闫伟[1,2] 袁运斌[1] 欧吉坤[1] 李得海[1,2] 

机构地区：[1]中国科学院测量与地球物理研究所动力大地测量学重点实验室,武汉市徐东大街340号430077 [2]中国科学院研究生院,北京市玉泉路甲19号100049

出　　处：《武汉大学学报（信息科学版）》2011年第6期648-651,共4页Geomatics and Information Science of Wuhan University

基　　金：国家杰出青年基金资助项目(40625013);国家自然科学基金资助项目(40890160);中国科学院知识创新工程领域前沿资助项目(0909141014);中国科学院研究生科技创新与社会实践专项基金资助项目

摘　　要：利用基于GPS双频原始观测数据的非组合精密单点定位(PPP)算法进行精密授时,给出了其数学模型与数据预处理策略。实验结果表明,非组合PPP算法可以有效避免传统PPP算法由于观测值组合过程中观测噪声及多路径效应误差被放大而造成的对接收机钟差解算的不利影响,实现亚纳秒级(0.3 ns)的钟差解算精度;同等条件下,非组合PPP算法授时精度优于传统PPP算法,可以用于精密授时解算。The theory and mathematical model of uncombined precise point positioning were proposed.And several effective data processing strategies were proposed to improve PPP receiver clock solution by avoid absorbing some un-modeled system errors.Full-featured PPP software was developed base on the GPSTk core library.Experiments with data from IGS stations distributed all over the world were carried out to evaluate the performance of GPS timing with uncombined PPP algorithm.The results support that PPP algorithm can achieve sub-nanosecond（0.3 ns） level receiver clock solution,and the uncombined PPP algorithm has better accuracy than the classic PPP algorithm with all things being equal.

关 键 词：精密单点定位 GPS授时 非组合 

分 类 号：P228.42[天文地球—大地测量学与测量工程]