Real-time rapid prediction of variations of Earth's rotational rate

NAOC Open IR

	Real-time rapid prediction of variations of Earth's rotational rate
	Wang QiJie 1; Liao DeChun 1; Zhou YongHong 1
	2008
Source Publication	CHINESE SCIENCE BULLETIN
ISSN	1001-6538
Volume	53 Issue:7 Pages:969
Abstract	Real-time rapid prediction of variations of the Earth's rotational rate is of great scientific and practical importance. However, due to the complicated time-variable characteristics of variations of the Earth's rotational rate (i.e., length of day, LOD), it is usually difficult to obtain satisfactory predictions by conventional linear time series analysis methods. This study employs the nonlinear artificial neural networks (ANN) to predict the LOD variations. The topology of the ANN model is determined by minimizing the root mean square errors (RMSE) of the predictions. Considering the close relationships between the LOD variations and the atmospheric circulation movement, the operational prediction series of axial atmospheric angular momentum (AAM) is incorporated into the ANN model as an additional input in the real-time rapid prediction of LOD variations with 1-5 days ahead. The results show that the LOD prediction is significantly improved after introducing the operational prediction series of AAM into the ANN model.
Keyword	PARAMETERS LENGTH real-time prediction variation of Earth's rotational rate atmospheric angular momentum artificial neural networks
Language	英语
Document Type	期刊论文
Identifier	http://ir.bao.ac.cn/handle/114a11/56793
Collection	中国科学院国家天文台
Affiliation	1.中国科学院国家天文台 2.中国科学院大学 3.Cent S University, Sch Info Phys & Geomat Engn, Changsha 410083, Peoples R China
First Author Affilication	National Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation GB/T 7714	Wang QiJie,Liao DeChun,Zhou YongHong. Real-time rapid prediction of variations of Earth's rotational rate[J]. CHINESE SCIENCE BULLETIN,2008,53(7):969.
APA	Wang QiJie,Liao DeChun,&Zhou YongHong.(2008).Real-time rapid prediction of variations of Earth's rotational rate.CHINESE SCIENCE BULLETIN,53(7),969.
MLA	Wang QiJie,et al."Real-time rapid prediction of variations of Earth's rotational rate".CHINESE SCIENCE BULLETIN 53.7(2008):969.

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