摘要
随着全球导航卫星系统(GNSS)的建设和完善,多系统融合时间比对成为未来发展的趋势。基于中国科学院国家授时中心、捷克无线电工程和电子学院以及瑞典国家计量研究院3个国际重要守时实验室的时间基准系统中四系统GNSS接收机伪距与载波相位观数据,以及国际GNSS服务中心发布的多系统精密轨道和钟差等数据,开展GNSS多系统PPP融合时间比对方法研究。试验结果表明,GNSS多系统PPP融合可以有效增加可用卫星的数目,相对于单系统卫星观测数量提高了2倍以上,减少了多径误差以及观测高度角较低所带来的观测噪声等影响,改善观测站的卫星分布对于接收机钟差参数的影响,提高时间比对的稳定性和可靠性。在长基线时间比对的稳定度方面,GNSS多系统PPP融合技术解算的两地钟差的稳定度方面要优于单系统,对基于北斗、格洛纳斯以及伽利略系统的单系统PPP比对有较明显的提高,且提高在5%以上。
With the construction of global navigation satellite system(GNSS), the technology of multi-system fusion time comparison has become the developing trend in the field of timekeeping. In this study, the data of GNSS receivers are utilized, which are from the time keeping laboratories of National Time Service Center of Chinese Academy of Sciences, Institute of Photonics and Electronics Academy of Sciences of the Czech Republic, and SP Technical Research Institute of Sweden. Based on the multi-system measurements data and the precision products clock, orbit downloaded from the international GNSS service center, the multi-system GNSS data fusion technology in PPP time comparison is studied. Experimental results show that the multi-system fusion technology can increase the number of available satellites. Compared with the single system, the number of observed satellites is doubled. The effects of multipath error and observation noise are reduced, which are caused by observation altitude angel. The influence of receiver clock error is suppressed, which can be used to improve the stability and reliability of time comparison. With the multi-system GNSS fusion technology in the long baseline time comparison, the stability results are better than of the any single system. Compared with BDS, GLONASS and Galileo, the stability is increased by at least 5%.
作者
张继海
董绍武
袁海波
广伟
白杉杉
Zhang Jihai;Dong Shaowu;Yuan Haibo;Guang Wei;Bai Shanshan(University of Chinese Academy of Sciences,Beijing 100049,China;National Time Service Center,CAS,Xi'an 710600,China;Key Lab of Time-frequency Standard of the Chinese Academy of Sciences,Xi'an 710600,China;School of Astronomy and Space Science,UCAS,Beijing 100049,China)
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2020年第5期39-47,共9页
Chinese Journal of Scientific Instrument
基金
中国科学院国家授时中心“青年创新人才”(NTSC青创201804)
中国科学院西部之光青年学者B类(XAB2019B13)
国家自然科学基金(11773030)项目资助
关键词
全球导航卫星系统
精密单点定位
GNSS多系统融合
载波相位时间比对
global navigation satellite system(GNSS)
precise point positioning
GNSS multi-system fusion
carrier phase time comparison
