The three-dimensional surface Spline model of geomagnetic field

doi:10.6038/cjg2018K0217

	The three-dimensional surface Spline model of geomagnetic field
	Feng An 1,2; Jiang Yong 1; Sun Han 3; An ZhenChang 4; Huang Ya 2
刊名	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
	2018-04-01
卷号	61 期号:4 页码:1352-1365
关键词	Geomagnetic field Three-dimensional model Surface Spline Chinese Meridian project CHAMP satellite IGRF12
ISSN号	0001-5733
DOI	10.6038/cjg2018K0217
文献子类	Article
英文摘要	Based on 149 surface observations and 50 CHAMP measuring data, along with newest 12 Chinese Meridian Project observations, as well as the 50 points of IGRF12 that lie in the level of 180 km, we created the three-dimensional Surface Spline (3D Spline) model of Chinese mainland for the first time. The boundary effect was controlled by 39 complimentary points. All data were removed the different field sources by CM4 model, so the created 3D Spline model expresses the regional main field. We have analyzed and compared the modeling values with that of Surface Spline (2D Spline), Taylor polynomial (2D Taylor), three-dimensional Taylor polynomial (3D Taylor) models and IGRF12. Results show the overall trends of elements X,Y,Z and F among these models are basically consistent, but the isolines of 3D Spline are relatively more tortuous. Moreover, the intensity of Y decreases while altitude increases. Through comparing the modeling values, residuals and Root-Mean-Square-Errors (RMSE) of 6 intentional missing points between 3D Spline, 2D and 3D Taylor models, results imply the former is better than others. RMSEs of Y,Z and F of 3D Spline are over 50% less than that of other models. The modeling precision of 3D Spline model at different altitudes largely depends upon the number and precision of measuring points at adjacent altitudes.
WOS关键词	HARMONIC-ANALYSIS ; MAGNETIC-FIELD ; CHAMP ; CHINA
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000430371500011
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/88284]
专题	中国科学院地质与地球物理研究所
通讯作者	Feng An
作者单位	1.Nanjing Univ Informat Sci & Technol, Inst Space Weather, Nanjing 210044, Jiangsu, Peoples R China 2.Chinese Acad Sci, State Key Lab Space Weather, Beijing 100190, Peoples R China 3.Xintianyuan Inst Disaster Prevent & Reduct, Hohhot, Inner Mongolia, Peoples R China 4.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Feng An,Jiang Yong,Sun Han,et al. The three-dimensional surface Spline model of geomagnetic field[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2018,61(4):1352-1365.
APA	Feng An,Jiang Yong,Sun Han,An ZhenChang,&Huang Ya.(2018).The three-dimensional surface Spline model of geomagnetic field.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,61(4),1352-1365.
MLA	Feng An,et al."The three-dimensional surface Spline model of geomagnetic field".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 61.4(2018):1352-1365.