Line data    Source code

       1             : //# EVLASwPow.h: Declaration of EVLA Switched Power Calibration
       2             : //# Copyright (C) 1996,1997,2000,2001,2002,2003
       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             : 
      28             : #ifndef SYNTHESIS_EVLASWPOW_H
      29             : #define SYNTHESIS_EVLASWPOW_H
      30             : 
      31             : #include <casacore/casa/aips.h>
      32             : #include <casacore/casa/Containers/Record.h>
      33             : #include <casacore/casa/BasicSL/Complex.h>
      34             : #include <synthesis/MeasurementComponents/VisCal.h>
      35             : #include <synthesis/MeasurementComponents/SolvableVisCal.h>
      36             : #include <synthesis/MeasurementComponents/StandardVisCal.h>
      37             : 
      38             : namespace casa { //# NAMESPACE CASA - BEGIN
      39             : 
      40             : // Forward declarations
      41             : class VisEquation;
      42             : 
      43             : 
      44             : // **********************************************************
      45             : //  EVLA switched power Gain and Tsys
      46             : //
      47             : 
      48             : 
      49             : class EVLASwPow : public GJones {
      50             : public:
      51             : 
      52             :   enum SPType{SWPOW,EVLAGAIN=SWPOW,RQ,SWPOVERRQ,SWPWTS,NONE};
      53             :   
      54             :   static SPType sptype(casacore::String name);
      55             :   static casacore::String sptype(SPType sptype);
      56             : 
      57             :   // Constructor
      58             :   EVLASwPow(VisSet& vs);
      59             :   EVLASwPow(casacore::String msname,casacore::Int MSnAnt,casacore::Int MSnSpw);
      60             :   EVLASwPow(const MSMetaInfoForCal& msmc);
      61             :   EVLASwPow(const casacore::Int& nAnt);
      62             : 
      63             :   virtual ~EVLASwPow();
      64             : 
      65             :   // Return the type enum (for now, pretend we are G)
      66           0 :   virtual Type type() { return VisCal::G; };
      67             : 
      68             :   // EVLA Gain and Tsys are casacore::Float parameters
      69        9817 :   virtual VisCalEnum::VCParType parType() { return VisCalEnum::REAL; };
      70             : 
      71             :   // Return type name as string (ditto)
      72           2 :   virtual casacore::String typeName()     { return "G EVLASWPOW"; };
      73           0 :   virtual casacore::String longTypeName() { return "G EVLASWPOW (Switched-power gain)"; };
      74             : 
      75             :   // Local setSpecify
      76             :   using GJones::setSpecify;
      77             :   virtual void setSpecify(const casacore::Record& specify);
      78             : 
      79             :   // Specific specify() that reads the SYSCAL subtable
      80             :   virtual void specify(const casacore::Record& specify);
      81             : 
      82             :   // In general, we are freq-dep
      83           4 :   virtual casacore::Bool freqDepPar() { return false; };
      84             : 
      85             : 
      86             : protected:
      87             : 
      88             :   // There are 4 parameters (Gain and Tsys for each pol)
      89          16 :   virtual casacore::Int nPar() { return 4; };  
      90             : 
      91             :   // The parameter array is not (just) the Jones matrix element array
      92           0 :   virtual casacore::Bool trivialJonesElem() { return false; };
      93             : 
      94             :   // Calculate Jones matrix elements (slice out the gains)
      95             :   virtual void calcAllJones();
      96             : 
      97             :   // Synchronize the weight-scaling factors
      98             :   //  Weights are multiplied by 1/Tsys(K) per antenna
      99             :   virtual void syncWtScale();
     100             : 
     101             :   // Experimenting with updateWt
     102             :   //virtual void updateWt(casacore::Matrix<casacore::Float>& wt,const casacore::Int& a1,const casacore::Int& a2);
     103             : 
     104             : private:
     105             : 
     106             :   // Fill the Tcals from the CALDEVICE table
     107             :   void fillTcals();
     108             : 
     109             :   // The name of the SYSCAL table
     110             :   casacore::String sysPowTabName_,calDevTabName_;
     111             : 
     112             :   // Tcal storage
     113             :   casacore::Cube<casacore::Float> tcals_;
     114             : 
     115             :   // Digital factors for the EVLA
     116             :   casacore::Float correff_;      // net corr efficiency (lossy)
     117             :   casacore::Float frgrotscale_;  // fringe rotation scale (lossless)
     118             :   //casacore::Float nyquist_;      // 2*dt*dv
     119             : 
     120             :   // Effective per-chan BW, per spw for weight calculation
     121             :   casacore::Vector<casacore::Double> effChBW_;
     122             : 
     123             : };
     124             : 
     125             : 
     126             : 
     127             : 
     128             : } //# NAMESPACE CASA - END
     129             : 
     130             : #endif
     131             :