Comparison of methods for a 3-D density inversion from airborne gravity gradiometry

doi:10.1007/s11200-016-0492-6

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	Comparison of methods for a 3-D density inversion from airborne gravity gradiometry
	Ye, Zhourun 1,2; Tenzer, Robert 3; Sneeuw, Nico 4
刊名	STUDIA GEOPHYSICA ET GEODAETICA
	2018
卷号	62 期号:1 页码:1-16
关键词	density structure airborne gravity gradiometry Tikhonov's regularization wavelet compression
ISSN号	0039-3169
DOI	10.1007/s11200-016-0492-6
英文摘要	In this study, we apply Tikhonov's regularization algorithm for a 3-D density inversion from the gravity-gradiometry data. To reduce the non-uniqueness of the inverse solution (carried out without additional information from geological evidence), we implement the depth-weighting empirical function. However, the application of an empirical function in the inversion equation brings the bias problem of the regularization factor when a traditional Tikhonov's algorithm is applied. To solve the bias problem of regularization factor selection, we present a standardized solution that comprises two parts for solving a 3-D constrained inversion equation, specifically the linear matrix transformation and Tikhonov's regularization algorithm. Since traditional regularization techniques become numerically inefficient when dealing with large number of data, we further apply methods which include the Simultaneous Iterative Reconstruction Technique (SIRT) and the wavelet compression combined with Least Squares QR-decomposition (LSQR). In our simulation study, we demonstrate that SIRT as well as the wavelet compression plus LSQR algorithm improve the computation efficiency, while provide results which closely agree with that obtained from applying Tikhonov's regularization. In particular, the algorithm of wavelet compression plus LSQR shows the best computing efficiency, because it combines the advantages of coefficients compression of big matrix and fast solution of sparse matrix. Similar findings are confirmed from the vertical gravity gradient data inversion for detecting potential deposits at the Kauring (near Perth, Western Australia) testing site.
资助项目	China Scholarship Council (CSC)
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000424035200001
内容类型	期刊论文
源URL	[http://202.127.146.157/handle/2RYDP1HH/4546]
专题	中国科学院武汉植物园
通讯作者	Tenzer, Robert
作者单位	1.Hefei Univ Technol, Inst Geomat Engn, Sch Civil Engn, Hefei Shi, Anhui Sheng, Peoples R China 2.Chinese Acad Sci, Inst Geodesy & Geophys, Wuhan, Hubei, Peoples R China 3.Hong Kong Polytech Univ, Dept Land Surveying & Geoinformat, 181 Chatham Rd South, Kowloon, Hong Kong, Peoples R China 4.Univ Stuttgart, Inst Geodesy, Geschwister Scholl Str 24-D, Stuttgart, Germany
推荐引用方式 GB/T 7714	Ye, Zhourun,Tenzer, Robert,Sneeuw, Nico. Comparison of methods for a 3-D density inversion from airborne gravity gradiometry[J]. STUDIA GEOPHYSICA ET GEODAETICA,2018,62(1):1-16.
APA	Ye, Zhourun,Tenzer, Robert,&Sneeuw, Nico.(2018).Comparison of methods for a 3-D density inversion from airborne gravity gradiometry.STUDIA GEOPHYSICA ET GEODAETICA,62(1),1-16.
MLA	Ye, Zhourun,et al."Comparison of methods for a 3-D density inversion from airborne gravity gradiometry".STUDIA GEOPHYSICA ET GEODAETICA 62.1(2018):1-16.