Application of the Wiener Filter to Total‐Field Magnetic Data for UXO Detection

Abstract

PreviousNext No AccessSymposium on the Application of Geophysics to Engineering and Environmental Problems 2007Application of the Wiener Filter to Total‐Field Magnetic Data for UXO DetectionAuthors: Todd MeglichYaoguo LiLeonard R. PasionTodd MeglichColorado School of Mines, Golden, COSearch for more papers by this author, Yaoguo LiColorado School of Mines, Golden, COSearch for more papers by this author, and Leonard R. PasionUniversity of British Columbia, Vancouver, CanadaSearch for more papers by this authorhttps://doi.org/10.4133/1.2924650 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract The detection of UXO in magnetic environments continues to be a difficult task. In these environments identified geophysical anomalies may either be metallic objects (UXO) or of a geologic origin. Current techniques such as bandpass filtering are sometimes inadequate by themselves in highly magnetic environments where the spatial wavelengths associated with the background geology are comparable to, or overlaps with, those of UXO anomalies. The Wiener filter assumes that the collected field data is a summation of the desired signal and the background response and the two components are not correlated. We develop a procedure based on the Wiener filter to separate geologic responses from UXO signals. Application of the Wiener filter involves the estimation of a transfer function defined by the ratio of signal and data power spectra. We have developed an iterative approach to estimate the transfer function using the power spectra of signal and geologic noise from the measured field data set and limited forward modeling of UXO anomalies. This approach is demonstrated by applying it to synthetic data examples and field data from Helena, Montana.Permalink: https://doi.org/10.4133/1.2924650FiguresReferencesRelatedDetailsCited ByOvercoming Overlapped Fields and Geolocation Errors in Point‐Dipole Magnetic Field InversionsRaymond M. René, Ryan T. René, Ki Young Kim, and Chan Hong Park11 May 2012 Symposium on the Application of Geophysics to Engineering and Environmental Problems 2007ISSN (online):1554-8015Copyright: 2007 Pages: 1557 publication data© 2007 Copyright © 2007 The Environmental and Engineering Geophysical SocietyPublisher:Environmental & Engineering Geophysical Society HistoryPublished: 30 Sep 2008 CITATION INFORMATION Todd Meglich, Yaoguo Li, and Leonard R. Pasion, (2007), "Application of the Wiener Filter to Total‐Field Magnetic Data for UXO Detection," Symposium on the Application of Geophysics to Engineering and Environmental Problems Proceedings : 1411-1421. https://doi.org/10.4133/1.2924650 Plain-Language Summary PDF DownloadLoading ...