Wavelets and wavelet-like transforms on the sphere and their application to geophysical data inversion

Details Wavelets and wavelet-like transforms on the sphere and their application to geophysical data inversion Wavelets and wavelet-like transforms on the sphere and their application to geophysical data inversion

2011-09-08

arxiv.org/abs/1109.1718v1

Physics

Data Analysis, Statistics and Probability

15 pages, 11 figures, submitted to the Proceedings of the SPIE 2011 conference Wavelets and Sparsity XIV

Scientific paper

Many flexible parameterizations exist to represent data on the sphere. In addition to the venerable spherical harmonics, we have the Slepian basis, harmonic splines, wavelets and wavelet-like Slepian frames. In this paper we focus on the latter two: spherical wavelets developed for geophysical applications on the cubed sphere, and the Slepian "tree", a new construction that combines a quadratic concentration measure with wavelet-like multiresolution. We discuss the basic features of these mathematical tools, and illustrate their applicability in parameterizing large-scale global geophysical (inverse) problems.

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