基于IGS MGEX产品分析GPS PPP时间传递  

Analysis of GPS PPP time transfer based on IGS-MGEX products

作　　者：张立 孙保琪[1,2,3] 武文俊[1,2] 葛玉龙 钦伟瑾[1,2] 杨旭海[1,2,3] ZHANG Li1,2,3, SUN Bao-qi1,2,3, WU Wen-jun1,2,GE Yu-long1,2,3, QIN Wei-jin1,2, YANG Xu-hai1,2,3(1. National Time Service Center, Chinese Academy of Sciences, Xi’an 710600,China;2. Key Laboratory of Precise Positioning and Timing Technology, National Time Service Center,Chinese Academy of Sciences, Xi’an 710600, China;3. School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 101048, Chin)

机构地区：[1]中国科学院国家授时中心,西安710600 [2]中国科学院精密导航定位与定时技术重点实验室,西安710600 [3]中国科学院大学天文与空间科学学院,北京101048

出　　处：《时间频率学报》2018年第2期88-94,共7页Journal of Time and Frequency

基　　金：国家自然科学基金青年科学基金资助项目(41104021);国家自然科学基金面上资助项目(11173026)

摘　　要：基于Bernese 5.2软件,利用精密单点定位(PPP)的方法,分别采用只包含GPS单系统的IGS快速、最终产品和由IGS多GNSS实验(MGEX)先导项目分析中心GFZ和CODE提供的包含4系统的产品,共4种不同的精密卫星轨道和钟差产品,对PTB-NTSC和PTB-ROB两条国际时间比对链路2个月的GPS数据进行了时间传递试验。选取使用IGS快速产品的时间传递结果为参考,以其他产品时间传递结果与参考值的差异来评价不同精密产品尤其是包含4系统的MGEX产品对GPS PPP时间传递的影响。试验结果表明,不同产品时间传递结果差异的RMS在0.1 ns左右,验证了MGEX多系统产品可以用于GPS PPP时间传递。考虑到MGEX产品本身的自洽性,该结果可以为后续基于MGEX产品进行北斗、Galileo PPP时间传递提供参考。mBased on the Bernese GNSS software 5.2, GPS PPP time transfer experiments are conducted with 62-day data sets from two international time links, PTB-NTSC and PTB-ROB. Four different precise satellite orbit and clock product sets, including IGS rapid and final GPS single system products, GBM and COM products from IGS-MGEX（multi-GNSS experiment） pilot project are used respectively. The result of IGS rapid product is set as reference. The differences between the time transfer results of other products and the reference are used to evaluate the effect of different products, particularly the MGEX products, on GPS PPP time transfer. The results show that the RMS of differences between the time transfer results of different products are at the level of 0.1 ns, it is verified that MGEX multi-system products can be used for GPS PPP time transfer. Considering the consistence of the MGEX products, the results can provide reference for subsequent Beidou and Galileo PPP time transfer based on MGEX products.

关 键 词：MGEX 卫星轨道和钟差产品 精密单点定位 时间传递 

分 类 号：TN927.2[电子电信—通信与信息系统]