Optimization aeromagnetic compensation method based on power spectrum estimation

doi:10.7523/j.issn.2095-6134.2018.05.016

Abstract

Abstract: Aeromagnetic exploration is one of the most important methods in geophysics. Magnetic fields are typically measured by using optically pumped magnetometer mounted on an aircraft. However, any aircraft produces significant levels of magnetic interference. Therefore, aeromagnetic compensation is essential. In this work, power spectrum estimation is proposed to process the signal of the maneuver flight. The optimal bandwidth for the computation of compensation coefficients is obtained by using the method. The optimal compensation coefficients lead to more accurate aeromagnetic compensation. A calibration experiment is designed. In the experiment more accurate optimal compensation coefficients and higher improvement radio are obtained. The validity of the proposed method is demonstrated by the experimental results.

Key words: aeromagnetic exploration, aeromagnetic compensation, optically pumped magnetometer, power spectrum estimation

CLC Number:

TH762.3

WU Peilin, ZHANG Qunying, CHEN Luzhao, FEI Chunjiao, ZHU Wanhua, FANG Guangyou. Optimization aeromagnetic compensation method based on power spectrum estimation[J]. , 2018, 35(5): 689-695.

References

[1] Nabighian M N. The historical development of the magnetic method in exploration[J]. Geophysics, 2005, 70(6):33-61.
[2] Hood P. History of aeromagnetic surveying in Canada[J]. Leading Edge, 2012, 26(11):1384-1392.
[3] Doll W E, Gamey T J, Bell D T, et al. Historical development and performance of airborne magnetic and electromagnetic systems for mapping and detection of unexploded ordnance[J]. Journal of Environmental & Engineering Geophysics, 2012, 17(1):1-17.
[4] Tolles W E. Compensation of aircraft magnetic fields:US 2692970 A[P/OL]. 1954-10-26[2017-07-05]. http://www.freepatentsonline.com/2692970.pdf.
[5] Tolles W E. Magnetic field compensation system:US 2706801 A[P/OL]. 1955-04-19[2017-07-05]. http://www.freepatentsonline.com/2706801.pdf.
[6] Leliak P. Identification and evaluation of magnetic-field sources of magnetic airborne detector equipped aircraft[J]. Aerospace & Navigational Electronics Ire Transactions on, 1961, ANE-8(3):95-105.
[7] Leach B W. Aeromagnetic compensation as a linear regression problem[J]. Information Linkage Between Applied Mathematics & Industry, 2010:139-161.
[8] Nelson J B. Aeromagnetic noise during low-altitude flights Over the scotian shelf:DRDC-ATLANTIC-TM-2002-089[R]. Dartmouth NS:Defence Research & Development Canada Atlantic, 2002, 1-40.
[9] Nelson J B. Predicting in-flight MAD noise from ground measurements:DREA-TM-2001-112[R]. Dartmouth NS:Defence Research Establishment Atlantic, 2002, 1-26.
[10] Nelson J B. Aeromagnetic noise from magnetometers and data acquisition systems[C/OL]//8th International Congress of the Brazilian Geophysical Society(2003-09-14)[2017-07-05].http://www.earthdoc.org/publication/publicationdetails/?publication=41507.
[11] Nelson J B. Aircraft magnetic noise sources[C/OL]//8th International Congress of the Brazilian Geophysical Society,(2003-09-14)[2017-07-05].http://www.earthdoc.org/publication/publicationdetails/?publication=41506.
[12] Noriega G. Aeromagnetic compensation in gradiometry:performance, model stability, and robustness[J]. IEEE Geoscience & Remote Sensing Letters, 2015, 12(1):117-121.
[13] Noriega G. Performance measures in aeromagnetic compensation[J]. Leading Edge, 2011, 30(10):1122-1127.
[14] Noriega G. Model stability and robustness in aeromagnetic compensation[J]. First Break, 2013, 31(3):73-79.
[15] 王景然, 卢立波, 刘浩,等. 贝尔直升机航磁仪磁补偿结果分析[J]. 海洋测绘, 2013, 33(6):11-13.
[16] 庞学亮, 张宁, 林春生. 基于有限脉冲响应模型的飞机磁场补偿方法[J]. 振动、测试与诊断, 2009, 29(4):462-465.
[17] 刘首善, 唐林牧, 许庆丰,等. 航磁补偿技术及补偿质量的评价方法[J]. 海军航空工程学院学报, 2016, 31(6):641-647.
[18] 骆遥, 段树岭, 王金龙,等. AGS-863航磁全轴梯度勘查系统关键性指标测试[J]. 物探与化探, 2011, 35(5):620-625.
[19] 李季, 潘孟春, 罗诗途,等. 半参数模型在载体干扰磁场补偿中的应用研究[J]. 仪器仪表学报, 2013, 34(9):2147-2152.
[20] Dou Z J, Han Q, Niu X M, et al. An aeromagnetic compensation coefficient-estimating method robust to geomagnetic gradient[J]. IEEE Geoscience & Remote Sensing Letters, 2016, 13(5):611-615.
[21] Dou Z J, Han Q, Niu X M, et al. An adaptive filter for aeromagnetic compensation based on wavelet multiresolution analysis[J]. IEEE Geoscience & Remote Sensing Letters, 2016, 13(8):1069-1073.
[22] Zhang D L, Huang D N, Lu J W, et al. Aeromagnetic compensation with partial least square regression[C/OL]//25th Geophysical Conference& Exhibition Adelaide:Australian Society of Exploration Geophysicists, (2016-08-21)[2017-07-05].http://www.publish.csiro.au/ex/pdf/ASEG2016ab300.
[23] Guo C H, Ma M, Cheng D F. A new solution of aircraft magnetic interference field based on errors-in-variables method[J]. Journal of Computational Intelligence & Electronic Systems, 2015, 4(1):70-73.
[24] 王婕, 郭子祺, 刘建英. 固定翼无人机航磁探测系统的磁补偿模型分析[J]. 航空学报, 2016, 37(11):3435-3443.
[25] Wu P L, Zhang Q Y, Fei C C et al. Aeromagnetic gradient compensation method for helicopter based on ∈-support vector regression algorithm[J]. Journal of Applied Remote Sensing, 2017, 11(2):025012.
[26] 乐贵明, 叶宗海, 龚菊红. 2001年11月24日特大磁暴前银河宇宙线短时间尺度功率谱分析[J]. 中国科学院研究生院学报, 2002, 19(2):163-167.