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| Titel |
A direction finding technique for the ULF electromagnetic source |
| VerfasserIn |
V. V. Surkov, O. A. Molchanov, M. Hayakawa |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 4, no. 4 ; Nr. 4, no. 4 (2004-09-20), S.513-517 |
| Datensatznummer |
250001816
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| Publikation (Nr.) |
 copernicus.org/nhess-4-513-2004.pdf |
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| Zusammenfassung |
| A technique of direction finding is proposed, which can be applied to the
magnetic-dipole type source located in the conductive ground. To distinguish
a weak ULF source signal from the natural noise a network of multicomponent
magnetometers is supposed to be used. The data obtained by the ground-based
stations is processed in such a way that a set of partial derivatives of the
magnetic perturbations due to the source are found. Comparing these
derivatives with theoretical formulae makes it possible, in principle, to
find the ULF source parameters such as the distance and amplitude. Averaging
the data and a special procedure are proposed in order to exclude random
fluctuations in the magnetic moment orientation and to avoid hydrogeological
and other local factors. |
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