Improved Continuation Iteration Method for Curved Surface on Vertical Space Reduction of Marine Magnetic Survey

被引：0
|
作者：
Liu Q. [1 ]
Bian G. [2 ]
Yin X. [2 ]
Zhan X. [1 ]
机构：
[1] 91937 Troops, Zhoushan
[2] Department of Hydrography and Cartography, Dalian Naval Academy, Dalian
来源：
Wuhan Daxue Xuebao (Xinxi Kexue Ban)/Geomatics and Information Science of Wuhan University | 2019年 / 44卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Continuation for curved surface; Iterative solution; Marine magnetic survey; Regularization; Vertical space reduction;
D O I：
10.13203/j.whugis20170276
中图分类号：
学科分类号：
摘要：
The constantly changing of depth of towfish into the water often leads to the magnetic data on a curved surface, which is not taken into account during data processing in marine magnetic survey. For the problem that the high frequency noise in the data is easy to be amplified by vertical deriva- tive in continuation iterative solution of integral equation for curved surface, Tikhonov regularization method is introduced to improve the iterative solution, and the regularization parameter is determined by using the L-curve criterion, which makes the continuation method more anti-noise. Theoretical model and actual examples show that the improved method can effectively suppress the influence of high frequency noise, and the precision of continuation is obviously improved, when the survey data is corrected to the lowest plane of curved surface, the magnetic anomaly discrepancy mean square error of the line network intersection is increased 2 nT than before reduction, which verifies the improved method is feasible for vertical space reduction of marine magnetic survey data. © 2019, Research and Development Office of Wuhan University. All right reserved.
引用
收藏
页码：112 / 117
页数：5
相关论文
共 18 条
  • [1] Bian G., Xia W., Jin S., Et al., Marine Magnetic Survey Data Processing and Its Application, (2015)
  • [2] Yu B., Liu Y., Bian G., Et al., Correction of Vertical Free-Air in Marine Magnetic Surveying, Geomatics and Information Science of Wuhan University, 33, 9, pp. 926-929, (2008)
  • [3] Yu B., Liu Y., Zhai G., Et al., Analysis of Vertical Space Variation of Marine Magnetic Field, Chinese J Geophys, 52, 1, pp. 169-175, (2009)
  • [4] Yu B., Huang M., Zhai G., Et al., Application and Determination of Threshold on Free-Air Correction of Marine Magnetic Survey, Geomatics and Information Science of Wuhan University, 35, 2, pp. 172-175, (2010)
  • [5] Bhattacharyya B.K., Chan K.C., Reduction of Magnetic and Gravity Data on an Arbitrary Surface Acquired in a Region of High Topographic Relief, Geophysics, 42, 7, pp. 1411-1430, (1977)
  • [6] Wang W., Pan Z., Li J., Continuation Methods for Curved Surface of the Three-Dimensional High-Precision Gravity and Magnetic Potential Field, Geophysical & Geochemical Exploration, 15, 6, pp. 415-422, (1991)
  • [7] Wang W., Liu J., Qiu Z., Et al., The Research of the Frequency Domain Dipole Layer Method for the Processing and Transformation of Potential Field on Curved Surface, Chinese J Geophys, 52, 10, pp. 2652-2665, (2009)
  • [8] Chen Z., Reduction of Magnetic and Gravity Data to a Horizontal Plane by Using Finite Element Method, Geophysical & Geochemical Exploration, 5, 3, pp. 153-158, (1981)
  • [9] Xu S., Lou Y., Application of the Boundary Element Method to the Continuation Upward and Transformation of 2-D Potential Field on Relief Topography, Computing Techniques for Geophysical and Geochemical Exploration, 7, 3, pp. 195-199, (1987)
  • [10] Liu J., Wang W., Yu C., Reduction of Potential Field Data to a Horizontal Plane by a Successive Approximation Procedure, Chinese J Geophys, 50, 5, pp. 1551-1557, (2007)
12