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BDS-3多种授时方法精度试验及比较分析 被引量:7
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作者 刘利 王冬霞 +1 位作者 刘治君 张天桥 《导航定位与授时》 CSCD 2021年第4期29-37,共9页
北斗卫星导航系统(BDS)本质上是一个高精度时间空间信息服务系统,是我国自主运行的重要空间基础设施。BDS-3已于2020年7月正式开通,向广大用户提供RNSS、SBAS、RDSS单向和RDSS双向等多种授时服务。针对BDS-3提供的各种授时服务进行了简... 北斗卫星导航系统(BDS)本质上是一个高精度时间空间信息服务系统,是我国自主运行的重要空间基础设施。BDS-3已于2020年7月正式开通,向广大用户提供RNSS、SBAS、RDSS单向和RDSS双向等多种授时服务。针对BDS-3提供的各种授时服务进行了简要介绍,详细讨论了各种授时方法,并利用实测数据进行了试验验证和比较分析。结果表明,BDS-3授时服务精度全部优于公布的指标要求,其中精度最高的SBAS授时方法精度可达2ns左右,RDSS双向授时精度和RNSS授时精度相当,达到9ns左右,RDSS单向授时精度最差,在15~30ns左右。 展开更多
关键词 北斗卫星导航系统 卫星无线电导航服务 星基增强服务 卫星无线电测定服务 授时
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Analysis of RDSS positioning accuracy based on RNSS wide area differential technique 被引量:7
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作者 XING Nan SU RanRan +8 位作者 ZHOU JianHua HU XiaoGong GONG XiuQiang LIU Li HE Feng GUO Rui REN Hui HU GuangMing ZHANG Lei 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS 2013年第10期1995-2001,共7页
The BeiDou Navigation Satellite System(BDS) provides Radio Navigation Service System(RNSS) as well as Radio Determination Service System(RDSS).RDSS users can obtain positioning by responding the Master Control Center(... The BeiDou Navigation Satellite System(BDS) provides Radio Navigation Service System(RNSS) as well as Radio Determination Service System(RDSS).RDSS users can obtain positioning by responding the Master Control Center(MCC) inquiries to signal transmitted via GEO satellite transponder.The positioning result can be calculated with elevation constraint by MCC.The primary error sources affecting the RDSS positioning accuracy are the RDSS signal transceiver delay,atmospheric trans-mission delay and GEO satellite position error.During GEO orbit maneuver,poor orbit forecast accuracy significantly impacts RDSS services.A real-time 3-D orbital correction method based on wide-area differential technique is raised to correct the orbital error.Results from the observation shows that the method can successfully improve positioning precision during orbital maneuver,independent from the RDSS reference station.This improvement can reach 50% in maximum.Accurate calibration of the RDSS signal transceiver delay precision and digital elevation map may have a critical role in high precise RDSS positioning services. 展开更多
关键词 BeiDou Navigation Satellite System (BDS) RDSS RNSS wide-area differential technique
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