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- Subject: spherical harmonics
- From: Klaus Gottschaldt <klgo(at)geo.uni-jena.de>
- Date: Fri, 13 Oct 2000 09:44:22 +0200
- Newsgroups: comp.lang.idl-pvwave
- Organization: Friedrich-Schiller-University Jena, Germany
- Xref: news.doit.wisc.edu comp.lang.idl-pvwave:21690
I want to analyze data on a sphere, representing them by spherical
This is somehow like a Fourier transform, but based on Legendre
polynoms, which are
defined on the surface of a sphere.
Unlike wavelets, this transform is global.
My data are given in the form [longitude, latitude, data_value], where
and data_value are vectors of the same length.
Data points are randomly scattered over the sphere with a resolution of
on the Earth's surface.
Does somebody know, how to do this transform with idl?