GUO JinYun; HAN YanBen; Zhang wei
Source Publicationscienceinchinaseriesgphysicsmechanicsastronomy
AbstractGeocenter 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.
Funding Project[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]
Document Type期刊论文
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
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.
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