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| Titel |
Anisotropy of the geomagnetic field detected with directional Poisson wavelets on the sphere |
| VerfasserIn |
Reyko Schachtschneider, Michael Hayn, Matthias Holschneider |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250040366
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| Zusammenfassung |
| The calculation of geomagnetic field models is a fundamental task in
geomagnetism. Up to now models have been calculated with isotropic
priors about the magnetic field. As the geomagnetic field is not
isotropic that approach might not be optimal. The main goal of this
project is to analyze the recently obtained high quality models of the
geomagnetic field based on CHAMP satellite data with the help of the
newly developed directional Poisson wavelets on the sphere. This will
allow us to asses and quantify the position and scale dependent
locally anisotropic correlation structure of the crustal field. In a
first step we apply the wavelet transform to the radial component of
the geomagnetic field, obtaining information about dominant
directions and scales of the locally anisotropic features. This
information can later be used to increase the accuracy of the field
inversions if this kind of non-isotropic information are taken into
account as prior information for the Bayesian inversion process. |
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