analysisonmotionofearthscenterofmassobservedwithchampmission

CORC > 国家天文台 > 中国科学院国家天文台

	analysisonmotionofearthscenterofmassobservedwithchampmission
	GUO JinYun; HAN YanBen; Zhang wei
刊名	scienceinchinaseriesgphysicsmechanicsastronomy
	2008
卷号	51 期号:10 页码:1597
ISSN号	1672-1799
英文摘要	Geocenter motion (GCM) is one important topic for constructing and maintaining the terrestrial reference frame and its applications. GCM is studied from CHAMP with the multi-step approach in this paper. Geometric orbits of CHAMP in 2001-2006 are precisely determined with the kinematic method only from the satellite-borne GPS zero-difference data. Then a GCM time series is estimated from the precise kinematic orbits based on the theory of satellite dynamics to fit the CHAMP's real geometric orbits. We compare the series with the geocenter series used in ITRF2005. Then the GCM series are analyzed with Fourier transform and wavelet transformation. The mean motions within 6 years in TX, TY and TZ directions are respectively 0.8 mm, 2.2 mm, and 7.9 mm. The trends of GCM in the three directions are 0.495 mm/a, -0.004 mm/a, and 1.309 mm/a, respectively. The long-term movement (2001-2006) indicates that the crustal figure is changing. The seasonal variations are the main component which may be excitated by the mass redistribution of Earth's fluid layer, e.g. ocean, atmosphere and continental water. The inter-annual variations are also found in the GCM series measured with CHAMP.
资助项目	[International S&T Cooperation Program of China] ; [National Hi-tech R&D Program of China] ; [National Natural Science Foundation of China] ; [Natural Science Foundation of Shandong Province, China]
语种	英语
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/40869]
专题	中国科学院国家天文台
作者单位	中国科学院国家天文台
推荐引用方式 GB/T 7714	GUO JinYun,HAN YanBen,Zhang wei. analysisonmotionofearthscenterofmassobservedwithchampmission[J]. scienceinchinaseriesgphysicsmechanicsastronomy,2008,51(10):1597.
APA	GUO JinYun,HAN YanBen,&Zhang wei.(2008).analysisonmotionofearthscenterofmassobservedwithchampmission.scienceinchinaseriesgphysicsmechanicsastronomy,51(10),1597.
MLA	GUO JinYun,et al."analysisonmotionofearthscenterofmassobservedwithchampmission".scienceinchinaseriesgphysicsmechanicsastronomy 51.10(2008):1597.