Research on the adaptive regularization filtering method of reduction-to-the-pole

doi:10.6038/cjg2023Q0718

IOCAS-IR > 海洋地质与环境重点实验室

	Research on the adaptive regularization filtering method of reduction-to-the-pole
	He Tao 1,4; Wang Hao 1; Zhang YiMi 1,4; Wang WanYin 1,2,3; Farquharson, Colin G.4; Welford, J. Kim 4
	2024-03-01
发表期刊	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
ISSN	0001-5733
卷号	67 期号:3 页码:1255-1272
通讯作者	Wang WanYin([email protected])
摘要	Reduction-to-the-pole (RTP) is a significant step in eliminating the effects of oblique magnetization on magnetic anomaly. This process can be conducted in both the wave-number (frequency domain) and the spatial domains. The RTP in the wave-number domain (frequency domain) is more efficient than in the spatial domain, but it can be unstable in low latitude areas. Thus, it is necessary to define the scope of the low latitude areas and develop stable, practical, and high-precision RTP methods. In this paper, the theoretical study shows that the maximum value of the amplitude is 2, and the corresponding magnetization inclination is +/- 45 degrees. Within this range of magnetization inclination, causing the instability in RTP procedure. To address this issue, an adaptive regularization filtering method of reduction-to-the-pole (ARF-RTP) is proposed based on the regularization idea. The method constructs a regularization filtering function using the amplitude of RTP factor, and with the amplitude value of 2 as the constraint, the determination value of the parameter in the method is calculated to realize the adaptive RTP of magnetic anomaly, which improves the stability and practicability of the method. Additionally, an iterative algorithm is used to improve the accuracy of the method. The proposed ARF-RTP method effectively solves the instability problem of the RTP in the low latitude areas. The accuracy, stability, and practicality of the method are verified using synthetic models and real data. The adaptive regularization filtering can not only solve the instability problem of RTP but also address instability problems in data processing, such as component transformation or magnetization direction transformation of magnetic field. The ARF-RTP method has broad application prospects.
关键词	Reduction-to-the-pole (RTP) Low latitudes areas Amplitude Adaptive regularization filtering Iterative algorithm
DOI	10.6038/cjg2023Q0718
收录类别	SCI
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:001208197000029
出版者	SCIENCE PRESS
WOS关键词	STABLE DOWNWARD CONTINUATION ; LOW LATITUDES ; MAGNETIZATION DIRECTION ; ITERATION METHOD ; ANALYTIC SIGNAL ; FIELD ; APPROXIMATION ; DERIVATIVES ; TRANSFORMS ; ANOMALIES
引用统计
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/185620
专题	海洋地质与环境重点实验室
通讯作者	Wang WanYin
作者单位	1.Changan Univ, Coll Geol Engn & Geomat, Xian 710054, Peoples R China 2.Natl Engn Res Ctr Offshore Oil & Gas Explorat, Beijing 100028, Peoples R China 3.Chinese Acad Sci, Key Lab Marine Geol & Environm, Qingdao 266071, Shandong, Peoples R China 4.Mem Univ Newfoundland, Dept Earth Sci, St John, NF A1B 3X5, Canada
推荐引用方式 GB/T 7714	He Tao,Wang Hao,Zhang YiMi,et al. Research on the adaptive regularization filtering method of reduction-to-the-pole[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2024,67(3):1255-1272.
APA	He Tao,Wang Hao,Zhang YiMi,Wang WanYin,Farquharson, Colin G.,&Welford, J. Kim.(2024).Research on the adaptive regularization filtering method of reduction-to-the-pole.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,67(3),1255-1272.
MLA	He Tao,et al."Research on the adaptive regularization filtering method of reduction-to-the-pole".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 67.3(2024):1255-1272.