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Multipole
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Authors          Ian Hinder and Andrew Knapp
Maintainer       Ian Hinder
Licence          GNU GPL version 2
Documentation    http://einsteintoolkit.org/documentation/ThornGuide/ThornGuidech133.html#x149-2383000O9
Download         svn checkout https://svn.einsteintoolkit.org/cactus/EinsteinAnalysis/Multipole/trunk Multipole
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Purpose of This Thorn
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The Multipole thorn performs spherical harmonic mode decomposition of
Cactus grid functions on coordinate spheres.  It can decompose
multiple grid functions with any spin-weight on multiple spheres.
This thorn uses the interpolator interface to access grid functions,
so works with mesh-refinement and multi-patch.

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Required thorns
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* An interpolator, e.g. AEILocalInterp

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Related thorns
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* WeylScal4 can be used to compute the Weyl scalars, which can then be
  decomposed into modes on coordinate spheres by Multipole.

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Publications
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Multipole has been used in the following publications:

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Copyright
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This thorn is copyright (C) 2007-2011 (C) by Ian Hinder and Andrew
Knapp.

This thorn is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This thorn is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this thorn (see the file COPYING in this directory);
if not, write to the Free Software Foundation, Inc., 59 Temple
Place, Suite 330, Boston, MA  02111-1307  USA