GNSS clock corrections densification at SHAO: from 5 min to 30 s

	GNSS clock corrections densification at SHAO: from 5 min to 30 s
	Chen JunPing1 ; Zhang YiZe 1,2; Zhou XuHua1 ; Pei Xiao 1,2; Wang JieXian 2; Wu Bin1
刊名	SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
	2014
卷号	57 期号:1 页码:166-175
关键词	satellite clock corrections GNSS epoch-difference clock densification kinematic precise point positioning
英文摘要	High frequency multi-GNSS zero-difference applications like Precise Orbit Determination (POD) for Low Earth Orbiters (LEO) and high frequency kinematic positioning require corresponding high-rate GNSS clock corrections. The determination of the GNSS clocks in the orbit determination process is time consuming, especially in the combined GPS/GLONASS processing. At present, a large number of IGS Analysis Centers (AC) provide clock corrections in 5-min sampling and only a few ACs provide clocks in 30-s sampling for both GPS and GLONASS. In this paper, an efficient epoch-difference GNSS clock determination algorithm is adopted based on the algorithm used by the Center for Orbit Determination in Europe (CODE). The clock determination procedure of the GNSS Analysis Center at Shanghai Astronomical Observatory (SHAO) and the algorithm is described in detail. It is shown that the approach greatly speeds up the processing, and the densified 30-s clocks have the same quality as the 5-min clocks estimated based on a zero-difference solution. Comparing the densified 30-s GNSS clocks provided by SHAO with that of IGS and its ACs, results show that our 30-s GNSS clocks are of the same quality as that of IGS. Allan deviation also gives the same conclusion. Further validation of the SHAO 30-s clock product is performed in kinematic PPP and LEO POD. Results indicate that the positions have the same accuracy when using SHAO 30-s GNSS clocks or IGS (and its AC) finals. The robustness of the algorithm and processing approach ensure its extension to provide clocks in 5-s or even higher frequencies. The implementation of the new approach is simple and it could be delivered as a black-box to the current scientific software packages.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Physics, Multidisciplinary
研究领域[WOS]	Physics
关键词[WOS]	GPS DATA ; EFFICIENT ; ORBITS ; TIME
收录类别	SCI
语种	英语
WOS记录号	WOS:000328879500021
内容类型	期刊论文
源URL	[http://119.78.226.72/handle/331011/16128]
专题	上海天文台_天文地球动力学研究中心
作者单位	1.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 2.Tongji Univ, Coll Surveying & Geoinformat, Shanghai 200092, Peoples R China
推荐引用方式 GB/T 7714	Chen JunPing,Zhang YiZe,Zhou XuHua,et al. GNSS clock corrections densification at SHAO: from 5 min to 30 s[J]. SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,2014,57(1):166-175.
APA	Chen JunPing,Zhang YiZe,Zhou XuHua,Pei Xiao,Wang JieXian,&Wu Bin.(2014).GNSS clock corrections densification at SHAO: from 5 min to 30 s.SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,57(1),166-175.
MLA	Chen JunPing,et al."GNSS clock corrections densification at SHAO: from 5 min to 30 s".SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY 57.1(2014):166-175.