source: issm/trunk-jpl/externalpackages/mealpix/help/html/mealpix_overview.html@ 25367

Last change on this file since 25367 was 25367, checked in by adhikari, 5 years ago

NEW: matlab package for analyzing spherical harmonics based on Max Tegmark's HEALpix tool
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6 <!--
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9 --><title>Product Overview</title><meta name="generator" content="MATLAB 7.12"><link rel="schema.DC" href="http://purl.org/dc/elements/1.1/"><meta name="DC.date" content="2011-02-19"><meta name="DC.source" content="mealpix_overview.m"><style type="text/css">
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65 </style></head><body><div class="content"><h1>Product Overview</h1><!--introduction--><p>MEALPix is a native Matlab implementation of a substantial subset of the <a href="http://healpix.jpl.nasa.gov/">HEALPix</a> subroutine library. It supports the fast and accurate statistical and astrophysical analysis of massive full-sky data sets. HEALPix is supported by NASA and ESO, used extensively by the WMAP and PLANCK missions, and is part of the official FITS World Coordinate System.</p><p>MEALPix provides fully vectorized functions for</p><div><ul><li>Conversion between position angles, cartesian direction vectors, and HEALPix ring and nest pixel indexing schemes;</li></ul></div><div><ul><li>Spherical harmonic resolution and analysis of functions on the sphere;</li></ul></div><div><ul><li>Nearest pixel identification (pixels within a given disc, pixels in a ring, pixels in a HEALPix face).</li></ul></div><p>MEALPix was created from the Fortran90 implementation <a href="http://healpix.jpl.nasa.gov">HEALPix</a> via a combination of hand coding and machine assisted conversion of the HEALPix F90 source code. Some routines were hand-coded based on the documented functionality of the F90 subroutines on which they were based. Other routines were hand-coded via inspection of the HEALPix F90 implementation source. Still other routines were machine converted from F90 to Matlab&#8482; using <a href="http://www.mathworks.com/matlabcentral/fileexchange/5260">f2matlab</a>. In this latter case the resulting Matlab&#8482; source was then hand-modified to vectorize the computations and take advantage of Matlab&#8482; data types and other functions.</p><!--/introduction--><p>Copyright 2010-2011 Lee Samuel Finn. <a href="mealpix_notices.html">Terms of Use</a>.</p><p class="footer"><br>
66 Published with MATLAB&reg; 7.12<br></p></div><!--
67##### SOURCE BEGIN #####
68%% Product Overview
69% MEALPix is a native Matlab implementation of a substantial subset of the
70% <http://healpix.jpl.nasa.gov/ HEALPix> subroutine library. It supports
71% the fast and accurate statistical and astrophysical analysis of massive
72% full-sky data sets. HEALPix is supported by NASA and ESO, used
73% extensively by the WMAP and PLANCK missions, and is part of the official
74% FITS World Coordinate System.
75%
76% MEALPix provides fully vectorized functions for
77%
78% * Conversion between position angles, cartesian direction vectors, and
79% HEALPix ring and nest pixel indexing schemes;
80%
81% * Spherical harmonic resolution and analysis of functions on the sphere;
82%
83% * Nearest pixel identification (pixels within a given disc, pixels in a
84% ring, pixels in a HEALPix face).
85%
86% MEALPix was created from the Fortran90 implementation
87% <http://healpix.jpl.nasa.gov HEALPix> via a combination of hand coding
88% and machine assisted conversion of the HEALPix F90 source code. Some
89% routines were hand-coded based on the documented functionality of the F90
90% subroutines on which they were based. Other routines were hand-coded via
91% inspection of the HEALPix F90 implementation source. Still other routines
92% were machine converted from F90 to Matlab(TM) using
93% <http://www.mathworks.com/matlabcentral/fileexchange/5260 f2matlab>. In
94% this latter case the resulting Matlab(TM) source was then hand-modified
95% to vectorize the computations and take advantage of Matlab(TM) data types
96% and other functions.
97
98%%
99% Copyright 2010-2011 Lee Samuel Finn. <mealpix_notices.html Terms of Use>.
100##### SOURCE END #####
101--></body></html>
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