BDS卫星实时钟差估计  

Estimate of BDS satellite real-time clock offset

作　　者：饶鹏文 毛亚 RAO Pengwen;MAO Ya(NASG Key Laboratory of Land Environment and Disaster Monitoring,China University of Mining and Technology,Xuzhou 221116,China;School of Environmental Science and Spatial Informatics,China University of Mining and Technology,Xuzhou 221116,China)

机构地区：[1]中国矿业大学国土环境与灾害监测国家测绘地理信息局重点实验室,江苏徐州221116 [2]中国矿业大学环境与测绘学院,江苏徐州221116

出　　处：《测绘通报》2020年第5期69-72,100,共5页Bulletin of Surveying and Mapping

基　　金：江苏省研究生科研与实践创新计划(SJCX19_0906);中国矿业大学科研与实践创新计划(SJCX19_0906)。

摘　　要：随着无人驾驶等高新技术的快速发展,实时精密单点定位在GNSS领域中受到越来越多的关注。研究实时卫星钟差的获取和实时定位精度具有较大的现实意义,本文为研究耦合BDS卫星轨道、钟差产品对定位精度的影响,采用不同精度的轨道产品实时获取卫星钟差。分析了卫星钟差误差与轨道误差之间的相关性及钟差对轨道误差的吸收能力,发现卫星钟差能够吸收95%以上的轨道径向误差和部分切线误差,在一定程度上弥补了轨道误差引起的定位误差。采用耦合的卫星轨道、钟差产品,单BDS系统定位精度可达到分米级的定位结果。With the rapid development of high-tech such as unmanned driving, real-time precise single point positioning has attracted more and more attention in the field of GNSS. It is of great practical significance to study the acquisition of real-time satellite clock error and the accuracy of real-time positioning. In order to study the influence of coupling BDS satellite orbit and clock error products on positioning accuracy, different precision orbit products are used to acquire satellite clock error in real-time. It studies the correlation between satellite clock offset and orbit error as well as the ability of satellite clock offset to absorb orbit error. The results show that the satellite clock offset can absorb 95% of the orbital error in radial and partial tangential error, and some extent compensate for the positioning error caused by the orbital error. Using coupled satellite orbit and clock difference products, the positioning accuracy of a single BDS system can reach decimeter-level positioning results.

关 键 词：BDS 实时钟差 轨道误差 SISURE 精密单点定位 

分 类 号：P228[天文地球—大地测量学与测量工程]