PSTerm.h

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00001 //# PSTerm.h: Definition for PSTerm
00002 //# Copyright (C) 2007
00003 //# Associated Universities, Inc. Washington DC, USA.
00004 //#
00005 //# This library is free software; you can redistribute it and/or modify it
00006 //# under the terms of the GNU Library General Public License as published by
00007 //# the Free Software Foundation; either version 2 of the License, or (at your
00008 //# option) any later version.
00009 //#
00010 //# This library is distributed in the hope that it will be useful, but WITHOUT
00011 //# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
00012 //# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
00013 //# License for more details.
00014 //#
00015 //# You should have received a copy of the GNU Library General Public License
00016 //# along with this library; if not, write to the Free Software Foundation,
00017 //# Inc., 675 Massachusetts Ave, Cambridge, MA 02139, USA.
00018 //#
00019 //# Correspondence concerning AIPS++ should be adressed as follows:
00020 //#        Internet email: aips2-request@nrao.edu.
00021 //#        Postal address: AIPS++ Project Office
00022 //#                        National Radio Astronomy Observatory
00023 //#                        520 Edgemont Road
00024 //#                        Charlottesville, VA 22903-2475 USA
00025 //#
00026 //#
00027 //# $Id$
00028 
00029 #ifndef SYNTHESIS_PSTERM_H
00030 #define SYNTHESIS_PSTERM_H
00031 
00032 
00033 #include <casa/Arrays/Vector.h>
00034 #include <msvis/MSVis/VisBuffer.h>
00035 #include <images/Images/ImageInterface.h>
00036 #include <images/Images/PagedImage.h>
00037 #include <images/Images/TempImage.h>
00038 #include <scimath/Mathematics/ConvolveGridder.h>
00039 #include <synthesis/TransformMachines/CFStore.h>
00040 #include <synthesis/TransformMachines/CFTerms.h>
00041 
00042 namespace casa{
00043   // <summary>  A class to apply the W-Term to the given image </summary>
00044   
00045   // <use visibility=export>
00046   // <prerequisite>
00047   // </prerequisite>
00048   // <etymology>
00049   // W-Term to account for non co-planar baselines
00050   // </etymology>
00051   //
00052   // <synopsis> 
00053   // 
00054   //</synopsis>
00055   class PSTerm: public CFTerms
00056   {
00057   public:
00058     PSTerm(): CFTerms() {};
00059     PSTerm (const IPosition shape, 
00060             const Vector<Double>& uvScale,
00061             const Vector<Double>& uvOffset,
00062             const Double& psScale):psCtor_p() 
00063     {init(shape,uvScale,uvOffset,psScale);};
00064 
00065     virtual ~PSTerm () {};
00066 
00067     void init(const IPosition shape, 
00068               const Vector<Double>& uvScale,
00069               const Vector<Double>& uvOffset,
00070               const Double& psScale);
00071     Matrix<Complex>& operator=(Matrix<Complex>&);
00072     Matrix<Complex>& operator*=(Matrix<Complex>&);
00073 
00074     void applySky(Matrix<Complex>& screen,Bool multiply=False);
00075     void applySky(Matrix<Complex>& screen, 
00076                   const Vector<Double>& sampling,
00077                   const Int inner);
00078     void normalizeImage(Lattice<Complex>& skyImage,
00079                         const Matrix<Float>& weights);
00080     virtual String name() {return String("PS Term");};
00081 
00082     //----------------------------------------------------------
00083     // Implementation of pure-virtual methods of CFTerms parent class.
00084     // CFTerms (and its derived classes) ned clean-up so that this
00085     // kind of code is not required everywhere).
00086     int getVisParams(const VisBuffer& vb,const CoordinateSystem& skyCoord=CoordinateSystem()) 
00087     {(void)vb;(void)skyCoord;return 0;};
00088 
00089     void setPolMap(const Vector<Int>& polMap) {(void)polMap;};
00090 
00091     virtual Float getSupportThreshold() {return 1e-3;};
00092 
00093     void applySky(ImageInterface<Float>&,// outputImages,
00094                   const VisBuffer&,// vb, 
00095                   const Bool,// doSquint=True,
00096                   const Int&,// cfKey=0,
00097                   const Int&,// muellerTerm=0,
00098                   const Double /*freqVal=-1*/) 
00099     {};
00100 
00101     void applySky(ImageInterface<Complex>&,// outputImages,
00102                   const VisBuffer&,// vb, 
00103                   const Bool,// doSquint=True,
00104                   const Int&,// cfKey=0,
00105                   const Int&,// muellerTerm=0,
00106                   const Double /*freqVal= -1*/ ) 
00107     {};
00108 
00109     Vector<Int> vbRow2CFKeyMap(const VisBuffer& /*vb*/, Int& /*nUnique*/) 
00110     {Vector<Int> tt;return tt;};
00111 
00112     Int makePBPolnCoords(const VisBuffer&,// vb,
00113                          const Int&,// convSize,
00114                          const Int&,// convSampling,
00115                          const CoordinateSystem&,// skyCoord,
00116                          const Int&,// skyNx, 
00117                          const Int&,// skyNy,
00118                          CoordinateSystem&// feedCoord
00119                          ) 
00120     {return 0;};
00121 
00122     Int getConvSize() {return 0;};
00123     Int getOversampling() {return 50;};
00124     Float getConvWeightSizeFactor() {return 1.0;};
00125 
00126     Bool rotationallySymmetric() {return True;};
00127 
00128   private:
00129     // spheroidal function
00130     CountedPtr<ConvolveGridder<Double, Complex> > psCtor_p;
00131     Vector<Double>  support_p;
00132     Vector<Int> sampling_p;
00133     Double psScale_p;
00134   };
00135 
00136 };
00137 
00138 #endif
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