The Legendre polynomials modeling method of small-scale geomagnetic fields

doi:10.6038/j.issn.0001-5733.2012.08.019

	The Legendre polynomials modeling method of small-scale geomagnetic fields
	Ou Jia-Ming 1,3; Du Ai-Min 1,2; Xu Wen-Yao 1; Hong Ming-Hua 1; Chen Geng-Xiong 1; Luo Hao 1; Zhao Xu-Dong 1; Bai Chun-Hua 1; Wang Yuan 1
刊名	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
	2012-08-01
卷号	55 期号:8 页码:2669-2675
关键词	Spatial resolution Geomagnetic field modeling Legendre polynomials Boundary effects Least square estimation
ISSN号	0001-5733
DOI	10.6038/j.issn.0001-5733.2012.08.019
文献子类	Article
英文摘要	Based on ground-based geomagnetic surveys, we propose a small-scale geomagnetic field modeling method using Legendre polynomials. Combined with the data preprocessing techniques and the least squared estimation, a high-degree model is constructed to describe the small-scale structure of the field and draw the geomagnetic field maps. The results of the experiments show that the average misfit of total field intensity between the predicted model and the real observations is less than 30 nT. At the same time, fine structures of the field can be predicted, and the boundary effect is effectively suppressed, which facilitate improvement of modeling of the geomagnetic field. We also discuss the advantage and shortage of this modeling technique and its application scope. It is of great significance for application of the geomagnetic field to space exploration, minerals prospecting and subsurface structure probing.
WOS关键词	EARTHS MAGNETIC-FIELD ; HARMONIC-ANALYSIS ; CHAMP
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000308571300019
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/84518]
专题	中国科学院地质与地球物理研究所
通讯作者	Ou Jia-Ming
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Chinese Acad Sci, State Key Lab Space Weather, Beijing 100080, Peoples R China 3.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Ou Jia-Ming,Du Ai-Min,Xu Wen-Yao,et al. The Legendre polynomials modeling method of small-scale geomagnetic fields[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2012,55(8):2669-2675.
APA	Ou Jia-Ming.,Du Ai-Min.,Xu Wen-Yao.,Hong Ming-Hua.,Chen Geng-Xiong.,...&Wang Yuan.(2012).The Legendre polynomials modeling method of small-scale geomagnetic fields.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,55(8),2669-2675.
MLA	Ou Jia-Ming,et al."The Legendre polynomials modeling method of small-scale geomagnetic fields".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 55.8(2012):2669-2675.