Possible enhancement of Earth's polar motion predictions using a wavelet-based preprocessing procedure

doi:10.1007/s11200-018-1026-1

NTSC-IR

	Possible enhancement of Earth's polar motion predictions using a wavelet-based preprocessing procedure
	Zhao, Danning 1; Lei, Yu 1,2
	2019
发表期刊	STUDIA GEOPHYSICA ET GEODAETICA
ISSN	0039-3169
卷号	63 期号:1 页码:83-94
摘要	Earth's polar motion predictions are essential in near real-time applications including spacecraft navigation and satellite orbit determinations and are also important for geophysics studies. It has previously been demonstrated that the basic problem in predicting a polar motion time-series is to treat separately its low- and high-frequency components. In this paper, this problem is solved by the combination of wavelet transform with the least-squares (LS) extrapolation and autoregressive (AR) method. Wavelet transform is first employed to separate the deterministic low-frequency components including the Chandler and annual wobbles and irregular short-period high-frequency components of a polar motion time-series. Then the deterministic parts are predicted using LS extrapolation of models for the linear trend, Chandler and annual wobbles, while the remaining irregular parts together with LS residuals are forecasted using the AR stochastic method. The polar motion predictions are computed as a combination of the LS extrapolation and AR prediction. The results show that the polar motion predictions up to 360 days in the future obtained by this approach can be remarkably enhanced due to the use of the wavelet-based preprocessing procedure. We conclude that the separate treatment of low- and high-frequency components is of use to enhance polar motion predictions.
关键词	polar motion prediction model wavelet decomposition least-squares extrapolation autoregressive model
资助者	National Natural Science Foundation of China ; National Natural Science Foundation of China ; West Light Foundation of Chinese Academy of Sciences ; West Light Foundation of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; West Light Foundation of Chinese Academy of Sciences ; West Light Foundation of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; West Light Foundation of Chinese Academy of Sciences ; West Light Foundation of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; West Light Foundation of Chinese Academy of Sciences ; West Light Foundation of Chinese Academy of Sciences
DOI	10.1007/s11200-018-1026-1
关键词[WOS]	ORIENTATION PARAMETERS
语种	英语
资助项目	National Natural Science Foundation of China[11503031] ; West Light Foundation of Chinese Academy of Sciences[XAB2017B06]
资助者	National Natural Science Foundation of China ; National Natural Science Foundation of China ; West Light Foundation of Chinese Academy of Sciences ; West Light Foundation of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; West Light Foundation of Chinese Academy of Sciences ; West Light Foundation of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; West Light Foundation of Chinese Academy of Sciences ; West Light Foundation of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; West Light Foundation of Chinese Academy of Sciences ; West Light Foundation of Chinese Academy of Sciences
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000459512900005
出版者	SPRINGER
引用统计
文献类型	期刊论文
条目标识符	http://210.72.145.45/handle/361003/11823
专题	中国科学院国家授时中心
通讯作者	Lei, Yu
作者单位	1.Baoji Univ Arts & Sci, Sch Elect & Elect Engn, Baoji 721013, Peoples R China 2.Chinese Acad Sci, Natl Time Serv Ctr, Xian 710600, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Danning,Lei, Yu. Possible enhancement of Earth's polar motion predictions using a wavelet-based preprocessing procedure[J]. STUDIA GEOPHYSICA ET GEODAETICA,2019,63(1):83-94.
APA	Zhao, Danning,&Lei, Yu.(2019).Possible enhancement of Earth's polar motion predictions using a wavelet-based preprocessing procedure.STUDIA GEOPHYSICA ET GEODAETICA,63(1),83-94.
MLA	Zhao, Danning,et al."Possible enhancement of Earth's polar motion predictions using a wavelet-based preprocessing procedure".STUDIA GEOPHYSICA ET GEODAETICA 63.1(2019):83-94.