Establishment of NmF2 empirical model in the northern hemisphere based on COSMIC occultation data
文献类型：期刊论文
| 作者 | Niu Jun; Fang HanXian; Weng LiBin |
| 刊名 | SCIENCE CHINA-TECHNOLOGICAL SCIENCES
 |
| 出版日期 | 2014 |
| 卷号 | 57期号:2页码:339-344 |
| ISSN号 | 1674-7321 |
| 关键词 | empirical NmF2 model empirical orthogonal function decomposition local wavelet power spectrum method least squares method |
| 通讯作者 | Fang, HX (reprint author), PLA Univ Sci & Technol, Inst Meteorol & Oceanog, Nanjing 211101, Jiangsu, Peoples R China. |
| 英文摘要 | Ionospheric peak value of F2 layer (N (m) F (2)) is an important parameter in the ionosphere, which has important applications in short-wave communication, ionospheric modeling and so on. In this paper, the empirical orthogonal function (EOF) decomposition method is used to analyze the N (m) F (2) obtained from the occultation data. Daily spatial distribution of N (m) F (2) at the same time is relatively even. Variance of first modal is much larger than the other modals. A local wavelet power spectrum (LWPS) method is applied to analysis the cycle of F (10.7) index and time coefficient of first modal. The result shows that they have similar cycle distribution, indicating that F (10.7) index is the main factor affecting variation of N (m) F (2). A function is established between the tine coefficient of first modal and F (10.7) index, average F (10.7) index value of early 81 days f (p) by least squares method. The results show that contribution coefficient of f (p) is negative which indicates that f (p) has an inert effect existing in the ionosphere. Contribution coefficient of F (10.7) is positive, which is consistent with the fact that it has an anomaly in winter/spring seasons. In summary, it is feasible to establish a mid-latitude empirical N (m) F (2) model in northern hemisphere based on occultation data and EOF decomposition method. |
| 学科主题 | 空间物理 |
| 收录类别 | SCI ; EI |
| 语种 | 英语 |
| 源URL | [http://ir.nssc.ac.cn/handle/122/2736]  |
| 专题 | 国家空间科学中心_空间科学部 |
| 推荐引用方式 GB/T 7714 | Niu Jun,Fang HanXian,Weng LiBin. Establishment of NmF2 empirical model in the northern hemisphere based on COSMIC occultation data[J]. SCIENCE CHINA-TECHNOLOGICAL SCIENCES,2014,57(2):339-344. |
| APA | Niu Jun,Fang HanXian,&Weng LiBin.(2014).Establishment of NmF2 empirical model in the northern hemisphere based on COSMIC occultation data.SCIENCE CHINA-TECHNOLOGICAL SCIENCES,57(2),339-344. |
| MLA | Niu Jun,et al."Establishment of NmF2 empirical model in the northern hemisphere based on COSMIC occultation data".SCIENCE CHINA-TECHNOLOGICAL SCIENCES 57.2(2014):339-344. |
入库方式： OAI收割
来源：国家空间科学中心
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