Noise reduction and data recovery for a VLF-EM survey using a nonlinear decomposition method

Geophysics

Volumn 72, Issue 5, 2007, Pages

  Jeng, Yih ^a   Lin, Ming Juin ^a   Chen, Chih Sung ^a   Wang, Yu Huai ^b  

^a NATIONAL TAIWAN NORMAL UNIVERSITY   (Taiwan)

^b NATIONAL SUN YAT SEN UNIVERSITY   (Taiwan)

Author keywords

[No Author keywords available]

Indexed keywords

ELECTROMAGNETIC WAVES; MATHEMATICAL MODELS; MATHEMATICAL TRANSFORMATIONS; NATURAL FREQUENCIES; NOISE ABATEMENT; TWO DIMENSIONAL;

EMPIRICAL MODE DECOMPOSITION; GEOLOGIC NOISE; HILBERT TRANSFORM; WAVENUMBER-DISTANCE DISTRIBUTION;

ACOUSTIC NOISE;

DATA INTERPRETATION; DATA INVERSION; DATA SET; DECOMPOSITION ANALYSIS; ELECTRICAL RESISTIVITY; ELECTROMAGNETIC SURVEY; EMPIRICAL ANALYSIS; NUMERICAL MODEL; SIGNAL-TO-NOISE RATIO; TRANSFORM;

EID: 34548539521     PISSN: 00168033     EISSN: None     Source Type: Journal    
DOI: 10.1190/1.2752561     Document Type: Article

References (25)

1. Barr, R., D. L. Jones, and C. J. Rodger, 2000, ELF and VLF radio waves: Journal of Atmospheric and Solar-Terrestrial Physics, 62, 1689-1718. 8xz JASPF3 1364-6826
2. Beamish, D., 1994, Two-dimensional, regularised inversion of VLF data: Journal of Applied Geophysics, 32, 357-374. c4u JAGPEA 0926-9851
3. 2000, Quantitative 2D VLF data interpretation: Journal of Applied Geophysics, 45, 33-47. c4u JAGPEA 0926-9851
4. Benson, A. K., K. L. Payne, and M. A. Stubben, 1997, Mapping groundwater contamination using DC resistivity and VLF geophysical methods - A case study: Geophysics, 62, 80-86. gpy GPYSA7 0016-8033 10.1190/1.1444148
5. Chien, H.-Y., 2006, Signal enhancement of ultra-shallow seismic data using empirical mode decomposition: M.Sc. thesis, National Taiwan Normal University.
6. Everett, M. E., and C. J. Weiss, 2002, Geological noise in near-surface electromagnetic induction data: Geophysical Research Letters, 29, 1010; http://dx.doi.org/10.1029/2001GL014049. gpr GPRLAJ 0094-8276 10.1029/ 2001GL014049
7. Fraser, D. C., 1969, Contouring of VLF-EM data: Geophysics, 34, 958-967. gpy GPYSA7 0016-8033 10.1190/1.1440065
8. Grant, F. S., and G. F. West, 1965, Interpretation theory in applied geophysics: McGraw-Hill Book Co.
9. Huang, N. E., C. C. Chern, K. Huang, L. W. Salvino, S. R. Long, and K. L. Fan, 2001, A new spectral representation of earthquake data: Hilbert spectral analysis of Station TCU129, Chi-Chi, Taiwan, 21 September 1999: Bulletin of the Seismological Society of America, 91, 1310-1338.
10. Huang, N. E., and S. R. Long, 2003, Normalized Hilbert transform and instantaneous frequency: NASA Patent GSC-14673-1.
11. Huang, N. E., Z. Shen, S. R. Long, M. C. Wu, H.-H. Shih, Q. Zheng, N.-C. Yen, C.-C. Tung, and H.-H. Liu, 1998, The empirical mode decomposition and the Hilbert spectrum for nonlinear and non-stationary time series analysis: Proceedings of the Royal Society of London Series A, 454, 903-995.
12. Jeng, Y., M.-J. Lin, and C.-S. Chen, 2004, A very low frequency-electromagnetic study of the geo-environmental hazardous areas in Taiwan: Environmental Geology, 46, 784-795. adz ENGOE9 0943-0105
13. Karous, M. R., and S. E. Hjelt, 1983, Linear filtering of VLF dip-angle measurements: Geophysical Prospecting, 31, 782-794. 8uc GPPRAR 0016-8025 10.1111/j.1365-2478.1983.tb01085.x
14. Monteiro Santos, F. A., A. Mateus, J. Figueiras, and M. A. Gonçalves, 2006, Mapping groundwater contamination around a landfill facility using the VLF-EM method - A case study: Journal of Applied Geophysics, 60, 115-125. c4u JAGPEA 0926-9851
15. Nuttall, A. H., 1996, On the quadrature approximation to the Hilbert transform of modulated signals: Proceedings of the IEEE, 54, 1458-1459. iee IEEPAD 0018-9219
16. Ogilvy, R. D., and A. C. Lee, 1991, Interpretation of VLF-EM in-phase data using current density pseudosections: Geophysical Prospecting, 39, 567-580. 8uc GPPRAR 0016-8025 10.1111/j.1365-2478.1991.tb00328.x
17. Park, C. G., and R. A. Helliwell, 1978, Magnetosphere effects of power line radiation: Science, 200, 727-730. sci SCIEAS 0036-8075
18. Paterson, N. R., and V. Ronka, 1971, Five years of surveying with the very low frequency electromagnetic method: Geoexploration, 9, 7-26. 9o7 GEOXAV 0016-7142
19. Pedersen, L. B., and M. Becken, 2005, Equivalent images derived from very-low-frequency (VLF) profile data: Geophysics, 70, no. 3, G43-G50. gpy GPYSA7 0016-8033 10.1190/1.1925742
20. Pedersen, L. B., and B. Oskooi, 2004, Tensor VLF measurements and variations of ground conductivity: A tutorial: Surveys in Geophysics, 25, 151-181. svg SUGEEC 0169-3298 10.1023/B:GEOP.0000028173.16347.80
21. Phillips, W. J., and W. E. Richards, 1975, A study of the effectiveness of the VLF method for the location of narrow-mineralized fault zones: Geoexploration, 13, 215-226. 9o7 GEOXAV 0016-7142
22. Pirttijärvi, M., 2004, Karous-Hjelt and Fraser filtering of VLF measurements: Manual of the KHFFILT program.
23. Telford, W. M., L. P. Geldart, and R. E. Sheriff, 1990, Applied geophysics, 2nd ed: Cambridge University Press.
24. Vallée, M. A., M. Chouteau, and G. J. Palacky, 1992, Effect of temporal and spatial variations of the primary signal on VLF total-field surveys: Geophysics, 57, 97-105. gpy GPYSA7 0016-8033 10.1190/1.1443192
25. Wu, Z., and N. E. Huang, 2004, A study of the characteristics of white noise using the empirical mode decomposition method: Proceedings of the Royal Society of London Series A, 460, 1597-1611.