alm2map_cxx_module.cc

00001 /*
00002  *  This file is part of Healpix_cxx.
00003  *
00004  *  Healpix_cxx is free software; you can redistribute it and/or modify
00005  *  it under the terms of the GNU General Public License as published by
00006  *  the Free Software Foundation; either version 2 of the License, or
00007  *  (at your option) any later version.
00008  *
00009  *  Healpix_cxx is distributed in the hope that it will be useful,
00010  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
00011  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00012  *  GNU General Public License for more details.
00013  *
00014  *  You should have received a copy of the GNU General Public License
00015  *  along with Healpix_cxx; if not, write to the Free Software
00016  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
00017  *
00018  *  For more information about HEALPix, see http://healpix.sourceforge.net
00019  */
00020 
00021 /*
00022  *  Healpix_cxx is being developed at the Max-Planck-Institut fuer Astrophysik
00023  *  and financially supported by the Deutsches Zentrum fuer Luft- und Raumfahrt
00024  *  (DLR).
00025  */
00026 
00027 /*
00028  *  Copyright (C) 2003-2014 Max-Planck-Society
00029  *  Author: Martin Reinecke
00030  */
00031 
00032 #include "xcomplex.h"
00033 #include "paramfile.h"
00034 #include "healpix_data_io.h"
00035 #include "alm.h"
00036 #include "alm_fitsio.h"
00037 #include "healpix_map.h"
00038 #include "healpix_map_fitsio.h"
00039 #include "alm_healpix_tools.h"
00040 #include "alm_powspec_tools.h"
00041 #include "fitshandle.h"
00042 #include "levels_facilities.h"
00043 #include "lsconstants.h"
00044 #include "announce.h"
00045 #include "planck_rng.h"
00046 
00047 using namespace std;
00048 
00049 namespace {
00050 
00051 template<typename T> void alm2map_cxx (paramfile &params)
00052   {
00053   int nlmax = params.template find<int>("nlmax");
00054   int nmmax = params.template find<int>("nmmax",nlmax);
00055   planck_assert(nmmax<=nlmax,"nmmax must not be larger than nlmax");
00056   string infile = params.template find<string>("infile");
00057   string outfile = params.template find<string>("outfile");
00058   int nside = params.template find<int>("nside");
00059   double fwhm = arcmin2rad*params.template find<double>("fwhm_arcmin",0);
00060   int cw_lmin=-1, cw_lmax=-1;
00061   if (params.param_present("cw_lmin"))
00062     {
00063     cw_lmin = params.template find<int>("cw_lmin");
00064     cw_lmax = params.template find<int>("cw_lmax");
00065     }
00066 
00067   arr<double> temp, pol;
00068   get_pixwin (params,nlmax,nside,temp,pol);
00069 
00070   bool deriv = params.template find<bool>("derivatives",false);
00071   if (deriv)
00072     {
00073     Alm<xcomplex<T> > alm;
00074     read_Alm_from_fits(infile,alm,nlmax,nmmax,2);
00075     if (fwhm>0) smoothWithGauss (alm, fwhm);
00076     if (cw_lmin>=0) applyCosineWindow(alm, cw_lmin, cw_lmax);
00077     Healpix_Map<T> map(nside,RING,SET_NSIDE),
00078                    mapdth(nside,RING,SET_NSIDE),
00079                    mapdph(nside,RING,SET_NSIDE);
00080     alm.ScaleL(temp);
00081 
00082     double offset = alm(0,0).real()/sqrt(fourpi);
00083     alm(0,0) = 0;
00084     alm2map_der1(alm,map,mapdth,mapdph);
00085     map.Add(T(offset));
00086     write_Healpix_map_to_fits (outfile,map,mapdth,mapdph,planckType<T>());
00087     return;
00088     }
00089 
00090   bool polarisation = params.template find<bool>("polarisation");
00091   bool do_regnoise = params.param_present("regnoiseT");
00092   if (!polarisation)
00093     {
00094     Alm<xcomplex<T> > alm;
00095     read_Alm_from_fits(infile,alm,nlmax,nmmax,2);
00096     if (fwhm>0) smoothWithGauss (alm, fwhm);
00097     if (cw_lmin>=0) applyCosineWindow(alm, cw_lmin, cw_lmax);
00098     Healpix_Map<T> map(nside,RING,SET_NSIDE);
00099     alm.ScaleL(temp);
00100 
00101     double offset = alm(0,0).real()/sqrt(fourpi);
00102     alm(0,0) = 0;
00103     alm2map(alm,map);
00104     map.Add(T(offset));
00105     if (do_regnoise)
00106       {
00107       planck_rng rng(params.template find<int>("rand_seed",42));
00108       double rms = params.template find<double>("regnoiseT");
00109       for (int i=0; i<map.Npix(); ++i)
00110         map[i] += rms*rng.rand_gauss();
00111       }
00112     write_Healpix_map_to_fits (outfile,map,planckType<T>());
00113     }
00114   else
00115     {
00116     Alm<xcomplex<T> > almT, almG, almC;
00117     read_Alm_from_fits(infile,almT,almG,almC,nlmax,nmmax,2);
00118     if (fwhm>0) smoothWithGauss (almT, almG, almC, fwhm);
00119     if (cw_lmin>=0) applyCosineWindow(almT, almG, almC, cw_lmin, cw_lmax);
00120     Healpix_Map<T> mapT(nside,RING,SET_NSIDE), mapQ(nside,RING,SET_NSIDE),
00121                    mapU(nside,RING,SET_NSIDE);
00122     almT.ScaleL(temp);
00123     almG.ScaleL(pol); almC.ScaleL(pol);
00124 
00125     double offset = almT(0,0).real()/sqrt(fourpi);
00126     almT(0,0) = 0;
00127     alm2map_pol(almT,almG,almC,mapT,mapQ,mapU);
00128     mapT.Add(T(offset));
00129     if (do_regnoise)
00130       {
00131       planck_rng rng(params.template find<int>("rand_seed",42));
00132       double rmsT  = params.template find<double>("regnoiseT"),
00133              rmsQU = params.template find<double>("regnoiseQU");
00134       for (int i=0; i<mapT.Npix(); ++i)
00135         {
00136         mapT[i] += rmsT *rng.rand_gauss();
00137         mapQ[i] += rmsQU*rng.rand_gauss();
00138         mapU[i] += rmsQU*rng.rand_gauss();
00139         }
00140       }
00141     write_Healpix_map_to_fits (outfile,mapT,mapQ,mapU,planckType<T>());
00142     }
00143   }
00144 
00145 } // unnamed namespace
00146 
00147 int alm2map_cxx_module (int argc, const char **argv)
00148   {
00149   module_startup ("alm2map_cxx", argc, argv);
00150   paramfile params (getParamsFromCmdline(argc,argv));
00151 
00152   bool dp = params.find<bool> ("double_precision",false);
00153   dp ? alm2map_cxx<double>(params) : alm2map_cxx<float>(params);
00154   return 0;
00155   }

Generated on Thu Oct 8 14:48:52 2015 for Healpix C++