摘要
针对GNSS系统间时间偏差,从溯源关系出发分析了其产生的来源,并详细介绍了利用融合PPP算法估计系统时间偏差的算法,且针对影响算法的多个因素进行了分析。并以GPS和GLONASS为例,基于全球分布的IGS测站的双模观测数据,利用融合PPP算法估计了GPS-GLONASS系统间时间偏差,发现每个测站求得的GPS-GLONASS系统时间偏差标准差在0-3ns之间,且同种类型接收机有相近的精度,更为重要的是,此法求得的结果虽然和单个接收机有相关性,但对单个接收机却是自洽的,可用于多模导航。
The reasons for GNSS inter-system bias were introduced in this paper. The system bias estimation method based on PPP algorithm was described in detail and the impact factors for this algorithm were analyzed. In this paper we used the PPP algorithm to estimate the GPS-GLONASS system bias based on globally distributed dual-mode IGS observation data. The results show that standard deviation of each GPS-GLONASS system bias is between 0-3 ns, and the accuracy of the same-type receiv- er is similar. The results obtained by the proposed method are relevant to single receiver, but the self-consistent sin- gle receiver can be used for multi-mode navigation.
出处
《测绘地理信息》
2016年第1期27-30,共4页
Journal of Geomatics
基金
国家自然科学基金资助项目(41274016)
地理信息工程国家重点实验室开放基金资助项目(SKLGIE2013-M-2-1)~~
