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Application of spherical Slepian functions to aeromagnetic data and in crustal field modelling

Beggan, Ciaran; Whaler, Kathy. 2013 Application of spherical Slepian functions to aeromagnetic data and in crustal field modelling. [Poster] In: Aeromagnetic Interpretation; RAS Special Meeting, London, Piccadilly, London, 31 July 2013. British Geological Survey. (Unpublished)

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Abstract/Summary

Models of the crustal magnetic field are typically represented using spherical harmonic coefficients. Rather than spherical harmonics, spherical Slepian functions (hereafter just Slepian functions) can be employed to produce a locally and also globally orthogonal basis in which to optimally represent the data in a region up to a given degree. The region can have any arbitrary shape and size. In this poster we show some of the possible applications of Slepian functions to aeromagnetic data studies: optimally separate a crustal field model into its oceanic and continental regions in order to investigate the spectral content; compactly describe regional spherical harmonics in a sparse manner; reconstruct a smooth function from a series of input data points

Item Type: Publication - Conference Item (Poster)
Additional Keywords: spherical Slepian functions, aeromagnetic, crustal field
NORA Subject Terms: Earth Sciences
Date made live: 01 Aug 2013 14:22 +0 (UTC)
URI: http://nora.nerc.ac.uk/id/eprint/502839

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