Scattering of ELF waves by underground formations because of night-day ionospheric ridge

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dc.contributor.author Valagiannopoulos, CA en
dc.contributor.author Uzunoglu, NK en
dc.date.accessioned 2014-03-01T01:27:12Z
dc.date.available 2014-03-01T01:27:12Z
dc.date.issued 2007 en
dc.identifier.issn 0048-6604 en
dc.identifier.uri http://hdl.handle.net/123456789/18341
dc.subject Ionosphere en
dc.subject.classification Geochemistry & Geophysics en
dc.subject.classification Instruments & Instrumentation en
dc.subject.classification Meteorology & Atmospheric Sciences en
dc.subject.classification Remote Sensing en
dc.subject.classification Telecommunications en
dc.subject.other Earth surface en
dc.subject.other Electromagnetic imaging en
dc.subject.other Extremely low frequencies en
dc.subject.other Green's function methods en
dc.subject.other Ionospheric heights en
dc.subject.other Mathematical principle en
dc.subject.other Method of auxiliary sources en
dc.subject.other Mode matching technique en
dc.subject.other Numerical results en
dc.subject.other Point sources en
dc.subject.other Electric furnaces en
dc.subject.other Optoelectronic devices en
dc.subject.other Scattering en
dc.subject.other Green's function en
dc.title Scattering of ELF waves by underground formations because of night-day ionospheric ridge en
heal.type journalArticle en
heal.identifier.primary 10.1029/2007RS003682 en
heal.identifier.secondary http://dx.doi.org/10.1029/2007RS003682 en
heal.identifier.secondary RS6S32 en
heal.language English en
heal.publicationDate 2007 en
heal.abstract In the present work the variation in ionospheric height observed during the dawn or dusk hours is used to develop an electromagnetic imaging system for extremely low frequencies (ELF). The description concerns the mathematical principles of the proposed method rather than a realistic implementation of the technique. The scattering of ELF waves emanating from a point source on the Earth surface by a cylindrical underground formation is studied analytically with use of a Green's function method. The ionospheric discontinuity is treated with the help of mode matching technique and the subterranean scatterer by application of the method of auxiliary sources. Numerical results are presented and discussed for several cases. Copyright 2008 by the American Geophysical Union. en
heal.publisher AMER GEOPHYSICAL UNION en
heal.journalName Radio Science en
dc.identifier.doi 10.1029/2007RS003682 en
dc.identifier.isi ISI:000251349700002 en
dc.identifier.volume 42 en
dc.identifier.issue 6 en

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