dc.contributor.author | Mogensen, Gavin T | |
dc.contributor.author | Espinosa, Hugo G | |
dc.contributor.author | Thiel, David V | |
dc.date.accessioned | 2017-06-29T12:30:42Z | |
dc.date.available | 2017-06-29T12:30:42Z | |
dc.date.issued | 2014 | |
dc.date.modified | 2014-02-06T22:18:17Z | |
dc.identifier.issn | 0196-2892 | |
dc.identifier.doi | 10.1109/TGRS.2013.2257801 | |
dc.identifier.uri | http://hdl.handle.net/10072/56538 | |
dc.description.abstract | Naturally 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.peerreviewed | Yes | |
dc.description.publicationstatus | Yes | |
dc.language | English | |
dc.language.iso | eng | |
dc.publisher | Institute of Electrical and Electronics Engineers | |
dc.publisher.place | United States | |
dc.relation.ispartofstudentpublication | N | |
dc.relation.ispartofpagefrom | 2074 | |
dc.relation.ispartofpageto | 2080 | |
dc.relation.ispartofissue | 4 | |
dc.relation.ispartofjournal | IEEE Transactions on Geoscience and Remote Sensing | |
dc.relation.ispartofvolume | 52 | |
dc.rights.retention | Y | |
dc.subject.fieldofresearch | Geophysics | |
dc.subject.fieldofresearch | Electrical and electromagnetic methods in geophysics | |
dc.subject.fieldofresearch | Geomatic engineering | |
dc.subject.fieldofresearch | Earth sciences | |
dc.subject.fieldofresearch | Engineering | |
dc.subject.fieldofresearchcode | 3706 | |
dc.subject.fieldofresearchcode | 370602 | |
dc.subject.fieldofresearchcode | 4013 | |
dc.subject.fieldofresearchcode | 37 | |
dc.subject.fieldofresearchcode | 40 | |
dc.title | Surface Impedance Mapping Using Sferics | |
dc.type | Journal article | |
dc.type.description | C1 - Articles | |
dc.type.code | C - Journal Articles | |
gro.faculty | Griffith Sciences, Griffith School of Engineering | |
gro.date.issued | 2013 | |
gro.hasfulltext | No Full Text | |
gro.griffith.author | Thiel, David V. | |
gro.griffith.author | Espinosa, Hugo G. | |