东南大学学报（自然科学版）2017，Vol.47Issue(4)：673-678,6.DOI:10.3969/j.issn.1001-0505.2017.04.008
GPS/BDS精密高频卫星钟差计算及应用
Generation and application of GPS/BDS precise high rate satellite clock
摘要
Abstract
To derive high frequency GPS/BDS(global positioning system/Beidou system) satellite clock, an improved algorithm of epoch-differenced GPS/BDS satellite clock densification is proposed.GNSS(global navigation satellite system) data of the IGS(International GNSS Service) MGEX(multi GNSS experiment) tracking network and the GFZ GPS/BDS satellite clocks at 5 min sampling are densified to 30 s for the algorithm evaluation.Analysis results show that, compared with the 30 s clocks provided by GFZ, the satellite clock differences are below 10 ps.The number of stations has neglectable impacts on the precision of the densified clocks.The Allan deviation of 30 s clocks is consistent with that of 5 min.Kinematic PPP (precise point positioning) with shifted epochs demonstrates that the densified clock does not lose accuracy.Kinematic PPP using densified 30 s and original 5 min clocks shows that PPP convergence time is reduced and positioning accuracy is greatly improved using the densified clocks.The computation efficiency of the algorithm is high, so it can be applied in the estimation of higher frequency satellite clocks.关键词
历元间差分/相对钟差/Allan方差/动态精密单点定位Key words
epoch difference/relative clock/Allan deviation/kinematic precise point positioning分类
天文与地球科学引用本文复制引用
张益泽,陈俊平,王解先,吴斌..GPS/BDS精密高频卫星钟差计算及应用[J].东南大学学报（自然科学版）,2017,47(4):673-678,6.基金项目
国家高技术研究发展计划(863计划)资助项目(2014AA123102)、国家自然科学基金资助项目(11673050,11273046). （863计划）
