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dc.contributor.authorMogensen, Gavin T
dc.contributor.authorEspinosa, Hugo G
dc.contributor.authorThiel, David V
dc.date.accessioned2017-06-29T12:30:42Z
dc.date.available2017-06-29T12:30:42Z
dc.date.issued2014
dc.date.modified2014-02-06T22:18:17Z
dc.identifier.issn0196-2892
dc.identifier.doi10.1109/TGRS.2013.2257801
dc.identifier.urihttp://hdl.handle.net/10072/56538
dc.description.abstractNaturally occurring radio emissions from discrete sferics in the frequency range 500 Hz to 30 kHz have the potential for shallow conductivity profiling beneath the surface of the earth. A dual-channel time-domain receiver was constructed and used over selected geophysical targets. The instrumentation was validated through a comparison with very low-frequency surface impedance measurements from a distant navigation transmitter and 2-D modeling using the impedance method. The multifrequency results were then verified using this 2-D modeling. The skin effect shows the frequency dependence of electromagnetic field strength dissipation as a signal enters a multilayered earth. Single-frequency methods offer fixed depth conductivity profiles whereas multiple frequencies reveal multiple depth conductivity profiles that can help with 3-D modeling of subsurface features and anomalies. Several electromagnetic techniques offer multiple-frequency operation capitalizing upon this effect however these techniques generally use a local artificial signal source, which leads to near-field distortion effects in the measured data. This method shows significant promise for cost-effective, high-speed, ground-level surface impedance measurements targeting subsurface features down to 100 m.
dc.description.peerreviewedYes
dc.description.publicationstatusYes
dc.languageEnglish
dc.language.isoeng
dc.publisherInstitute of Electrical and Electronics Engineers
dc.publisher.placeUnited States
dc.relation.ispartofstudentpublicationN
dc.relation.ispartofpagefrom2074
dc.relation.ispartofpageto2080
dc.relation.ispartofissue4
dc.relation.ispartofjournalIEEE Transactions on Geoscience and Remote Sensing
dc.relation.ispartofvolume52
dc.rights.retentionY
dc.subject.fieldofresearchGeophysics
dc.subject.fieldofresearchElectrical and electromagnetic methods in geophysics
dc.subject.fieldofresearchGeomatic engineering
dc.subject.fieldofresearchcode3706
dc.subject.fieldofresearchcode370602
dc.subject.fieldofresearchcode4013
dc.titleSurface Impedance Mapping Using Sferics
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.facultyGriffith Sciences, Griffith School of Engineering
gro.date.issued2013
gro.hasfulltextNo Full Text
gro.griffith.authorThiel, David V.
gro.griffith.authorMogensen, Gavin
gro.griffith.authorEspinosa, Hugo G.


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