Line data    Source code

       1             : //# VPSkyJones.h: Definitions of interface for VPSkyJones 
       2             : //# Copyright (C) 1996,1997,1998,1999,2000,2002,2003
       3             : //# Associated Universities, Inc. Washington DC, USA.
       4             : //#
       5             : //# This library is free software; you can redistribute it and/or modify it
       6             : //# under the terms of the GNU Library General Public License as published by
       7             : //# the Free Software Foundation; either version 2 of the License, or (at your
       8             : //# option) any later version.
       9             : //#
      10             : //# This library is distributed in the hope that it will be useful, but WITHOUT
      11             : //# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
      12             : //# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
      13             : //# License for more details.
      14             : //#
      15             : //# You should have received a copy of the GNU Library General Public License
      16             : //# along with this library; if not, write to the Free Software Foundation,
      17             : //# Inc., 675 Massachusetts Ave, Cambridge, MA 02139, USA.
      18             : //#
      19             : //# Correspondence concerning AIPS++ should be adressed as follows:
      20             : //#        Internet email: casa-feedback@nrao.edu.
      21             : //#        Postal address: AIPS++ Project Office
      22             : //#                        National Radio Astronomy Observatory
      23             : //#                        520 Edgemont Road
      24             : //#                        Charlottesville, VA 22903-2475 USA
      25             : //#
      26             : //#
      27             : //# $Id$
      28             : 
      29             : #ifndef SYNTHESIS_VPSKYJONES_H
      30             : #define SYNTHESIS_VPSKYJONES_H
      31             : 
      32             : #include <casacore/casa/aips.h>
      33             : #include <casacore/measures/Measures/Stokes.h>
      34             : #include <synthesis/TransformMachines/BeamSkyJones.h>
      35             : 
      36             : 
      37             : namespace casacore{
      38             : 
      39             : class Table;
      40             : }
      41             : 
      42             : namespace casa { //# NAMESPACE CASA - BEGIN
      43             : 
      44             : 
      45             : //# Someday, we'll need these forward declarations for Solve in the Jones Matrices
      46             : class SkyEquation;
      47             : class SkyModel;
      48             : 
      49             : 
      50             : // <summary> Model the diagonal elements of the Voltage Pattern Sky Jones Matrices </summary>
      51             : 
      52             : // <use visibility=export>
      53             : 
      54             : // <reviewed reviewer="" date="" tests="" demos="">
      55             : 
      56             : // <prerequisite>
      57             : // <li> <linkto class="SkyEquation">SkyEquation</linkto> class
      58             : // <li> <linkto class="BeamSkyJones">BeamSkyJones</linkto> class
      59             : // </prerequisite>
      60             : //
      61             : // <etymology>
      62             : // VP = Voltage Pattern, SkyJones = Sky-based Jones matrices.
      63             : // This class only deals with the diagonal elements of the
      64             : // voltage pattern jones matrices.
      65             : // </etymology>
      66             : //
      67             : // <synopsis> 
      68             : //
      69             : // </synopsis> 
      70             : //
      71             : // <example>
      72             : // <srcblock>
      73             : // </srcblock>
      74             : // </example>
      75             : //
      76             : // <motivation>
      77             : // To deal with the non-leakage voltage pattern as applied to all casacore::Stokes,
      78             : // and beam squint (ie, errors in casacore::Stokes V caused by differing RR and
      79             : // LL beams).  Polarization leakage beams are in DBeamSkyJones.
      80             : // The motivation for this split is differing storage requirements
      81             : // for the unerlying PBMath types, and different methods available
      82             : // to VPSkyJones and DBeamSkyJones.
      83             : // </motivation>
      84             : //
      85             : // <todo asof="98/09/01">
      86             : // <li> Solvable part needs implementation: we need to derive an
      87             : // image of gradients of the elements of the Jones matrix. See VisJones
      88             : // for how to do this.
      89             : // </todo>
      90             : 
      91             : class VPSkyJones : public BeamSkyJones {
      92             : 
      93             : public:
      94             : 
      95             :   // constructor from a VP Table
      96             :   VPSkyJones(const casacore::MSColumns& msc, casacore::Table& table,
      97             :              const casacore::Quantity &parAngleInc,
      98             :              BeamSquint::SquintType doSquint,
      99             :              const casacore::Quantity &skyPositionThreshold = casacore::Quantity(180.,"deg"));
     100             : 
     101             :   // constructor for default PB type associated with MS
     102             :   VPSkyJones(const casacore::MSColumns& msc, 
     103             :              casacore::Bool makeDefaultPBsFromMS = true,
     104             :              const casacore::Quantity &parallacticAngleIncrement = casacore::Quantity(720.0, "deg"),
     105             :              BeamSquint::SquintType doSquint = BeamSquint::NONE,
     106             :              const casacore::Quantity &skyPositionThreshold = casacore::Quantity(180.,"deg"));
     107             : 
     108             :   
     109             :   // constructor for common PB type
     110             :   VPSkyJones(const casacore::String& tel,
     111             :              PBMath::CommonPB commonPBType,
     112           0 :              const casacore::Quantity &parallacticAngleIncrement = casacore::Quantity(720.0, "deg"),
     113             :              BeamSquint::SquintType doSquint = BeamSquint::NONE,
     114           0 :              const casacore::Quantity &skyPositionThreshold = casacore::Quantity(180.,"deg"));
     115             : 
     116             :   // constructor for given PBMath type
     117             :   VPSkyJones(const casacore::String& tel,
     118             :              PBMath& myPBMath,
     119             :              const casacore::Quantity &parallacticAngleIncrement = casacore::Quantity(720.0, "deg"),
     120             :              BeamSquint::SquintType doSquint = BeamSquint::NONE,
     121             :              const casacore::Quantity &skyPositionThreshold = casacore::Quantity(180.,"deg"));
     122             : 
     123             :   
     124             :   // destructor needed so it's not an abstract baseclass
     125          90 :   ~VPSkyJones(){}
     126             : 
     127             :   // return SkyJones type
     128          17 :   Type type() {return SkyJones::E;};
     129             : 
     130             :   // Is this solveable?
     131           0 :   virtual casacore::Bool isSolveable() {return false;};
     132             :  
     133             : 
     134             : 
     135             : protected:
     136             : 
     137             : private:    
     138             : 
     139             : };
     140             :  
     141             : 
     142             : } //# NAMESPACE CASA - END
     143             : 
     144             : #endif
     145             :