Possible enhancement of Earth's polar motion predictions using a wavelet-based preprocessing procedure
文献类型：期刊论文
| 作者 | Zhao, Danning1; Lei, Yu1,2
|
| 刊名 | STUDIA GEOPHYSICA ET GEODAETICA
 |
| 出版日期 | 2019 |
| 卷号 | 63期号:1页码:83-94 |
| 关键词 | polar motion prediction model wavelet decomposition least-squares extrapolation autoregressive model |
| ISSN号 | 0039-3169 |
| DOI | 10.1007/s11200-018-1026-1 |
| 英文摘要 | 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. |
| WOS关键词 | ORIENTATION PARAMETERS |
| 资助项目 | National Natural Science Foundation of China[11503031] ; West Light Foundation of Chinese Academy of Sciences[XAB2017B06] |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000459512900005 |
| 出版者 | SPRINGER |
| 资助机构 | 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 |
| 源URL | [http://210.72.145.45/handle/361003/11822]  |
| 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. |
入库方式： OAI收割
来源：国家授时中心
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。