【作者】 孙广； 陆华； 沈利荣； 贾小林； 郭美军；

【Author】 Sun guang;Lu hua;Shen lirong;Jia xiaolin;Guo meijun;Xi’an Aerors Data Technology Co.Ltd;Xidian University;Xi’an Research Inst it ut e of Surveying and Mapping;

【机构】 西安航天天绘数据技术有限公司； 西安电子科技大学； 西安测绘研究所；

【摘要】 随着GALILEO、BDS等各种导航系统的不断完善、更新,以及目前对高精度导航的迫切需求,多系统组合导航将成为GNSS的主要研究方向。为了提高GNSS系统之间的兼容和互操作性,精确确定不同导航系统之间的时差显得尤为重要。基于此,通过利用多模双频接收机输出的导航系统观测数据、导航电文以实现对GNSS系统时差的监测。利用BIPM T公报中的相关数据,对GLONASS和GPS实测的时差数据与BIPM T公报中对应的时差数据进行精度评估,统计了2015年连续9个月BDS、GPS和GLONASS三系统时差数据的各类统计参数,利用9个月的时差数据进行时差监测评估,实测数据分析结果表明:GLONASS与GPS时差与T公报结果的残差标准差为3.95ns,北斗与GPS、GLONASS系统时差的标准差最优可达到2.88ns和3.67ns。更多还原

【Abstract】 With the improvement and updating of GPS, GLONASS navigation system,and the urgent demand for high precision navigation, Mult i-system GNSS navigation systems have become the main research directions. In order to achieve the compatibility and interoperability among the GNSS systems,accurately determine the time difference between different systems is the key. Based on this, this paper using the GNSS observation data which is the output of the multi-mode dual-band receiver and the GNSS system’ navigation message to monitor the time difference between different GNSS navigation systems. In this paper, by using the related data of the BIPM T released, the data of the measured time difference of GLONASS’ and GPS’ and the corresponding difference data of BIPM T bullet in are used to be evaluated. All kinds of statistical parameters of the time difference data of BDS,GPS and GLONASS system in a row of nine months in 2015 are analyzed, time difference data of nine months are used to Evaluate and monitor the time difference, real data analysis results show that the residual’standard deviation between GLONASS’, GPS’ time difference with the results of T bullet in is 3.95 ns,and the residual’ standard deviation between BDS with GPS, GLONASS system can reach 2.88 ns and 3.67 ns in optimal conditions.更多还原