Line data    Source code

       1             : //# FringeJones.h: Declaration of fringe-fitting VisCal
       2             : //# Copyright (C) 1996,1997,2000,2001,2002,2003,2011,2016
       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: aips2-request@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_FRINGEJONES_H
      29             : #define SYNTHESIS_FRINGEJONES_H
      30             : 
      31             : #include <casacore/casa/aips.h>
      32             : #include <synthesis/MeasurementComponents/StandardVisCal.h>
      33             : #include <synthesis/MeasurementComponents/DelayRateFFT.h>
      34             : #include <synthesis/CalTables/CTTimeInterp1.h>
      35             : 
      36             : 
      37             : namespace casa { //# NAMESPACE CASA - BEGIN
      38             : 
      39             : // Rate-aware time interpolation engine
      40             : class CTRateAwareTimeInterp1 : public CTTimeInterp1 {
      41             : 
      42             : public:
      43             : 
      44             :   // From NewCalTable
      45             :   CTRateAwareTimeInterp1(NewCalTable& ct,
      46             :                          const casacore::String& timetype,
      47             :                          casacore::Array<casacore::Float>& result,
      48             :                          casacore::Array<casacore::Bool>& rflag);
      49             : 
      50             :   // Destructor
      51             :   virtual ~CTRateAwareTimeInterp1();
      52             : 
      53             :   // Interpolate, given timestamp; returns T if new result
      54             :   virtual casacore::Bool interpolate(casacore::Double time);
      55             : 
      56             :   // static factory method to make CTRateAwareTimeInterp1
      57             :   // NB: returns pointer to a _generic_ CTTimeInterp1
      58           0 :   static CTTimeInterp1* factory(NewCalTable& ct,
      59             :                                 const casacore::String& timetype,
      60             :                                 casacore::Array<casacore::Float>& result,
      61             :                                 casacore::Array<casacore::Bool>& rflag) {
      62           0 :     return new casa::CTRateAwareTimeInterp1(ct,timetype,result,rflag); }
      63             : 
      64             : private:
      65             : 
      66             :   // Refine time-dep phase with rate info
      67             :   void applyPhaseRate(casacore::Bool single);
      68             : 
      69             :   // Default ctor is unusable
      70             :   //  CTRateAwareTimeInterp1(); 
      71             : 
      72             : };
      73             : 
      74             : 
      75             : // Fringe-fitting (parametrized phase) VisCal
      76             : class FringeJones : public GJones {
      77             : public:
      78             :   // Constructor
      79             :   //  TBD:  MSMetaInfoForCal-aware version; deprecate older ones
      80             :   FringeJones(VisSet& vs);
      81             :   FringeJones(casacore::String msname,casacore::Int MSnAnt,casacore::Int MSnSpw);
      82             :   FringeJones(const MSMetaInfoForCal& msmc);
      83             :   FringeJones(casacore::Int nAnt);
      84             : 
      85             :   virtual ~FringeJones();
      86             : 
      87             :   // We have casacore::Float parameters
      88           0 :   virtual VisCalEnum::VCParType parType() { return VisCalEnum::REAL; };
      89             : 
      90             :   // Return the type enum
      91           0 :   virtual Type type() { return VisCal::K; };
      92             : 
      93             :   // Return type name as string
      94           0 :   virtual casacore::String typeName()     { return "Fringe Jones"; };
      95           0 :   virtual casacore::String longTypeName() { return "Fringe Jones (parametrized phase)"; };
      96             : 
      97             :   // Type of Jones matrix according to nPar()
      98           0 :   virtual Jones::JonesType jonesType() { return Jones::Diagonal; };
      99             : 
     100           0 :   virtual bool timeDepMat() { return true; };
     101             : 
     102             :   // Freq dependence (delays)
     103           0 :   virtual casacore::Bool freqDepPar() { return false; };
     104             :   // If the following is false frequency spectrum is squashed to one point.
     105           0 :   virtual casacore::Bool freqDepMat() { return true; };
     106             : 
     107             :   // Local setApply to enforce calWt=F for delays
     108             :   virtual void setApply(const casacore::Record& apply);
     109             :   virtual void setApply();
     110             :   using GJones::setApply;
     111             :   virtual void setCallib(const casacore::Record& callib,
     112             :                          const casacore::MeasurementSet& selms);
     113             : 
     114             :   // Local setSolve (traps lack of refant)
     115             :   virtual void setSolve(const casacore::Record& solve);
     116             :   using GJones::setSolve;
     117             : 
     118             :   // Default parameter value
     119           0 :   virtual casacore::Complex defaultPar() { return casacore::Complex(0.0); };
     120             :   
     121             :   // FIXME: was omitted
     122             :   virtual void specify(const casacore::Record& specify);
     123             :   
     124             :   // This type is not yet accumulatable
     125           0 :   virtual casacore::Bool accumulatable() { return false; };
     126             : 
     127             :   // This type is smoothable
     128           0 :   virtual casacore::Bool smoothable() { return true; };
     129             : 
     130             :   // Delay to phase calculator
     131             :   virtual void calcAllJones();
     132             : 
     133             :   // Hazard a guess at parameters (unneeded here)
     134             :   //  TBD?  Needed?
     135           0 :   virtual void guessPar(VisBuffer& ) {};
     136             : 
     137             :   // FringeJones uses generic gather, but solves for itself per solution
     138           0 :   virtual casacore::Bool useGenericGatherForSolve() { return true; };
     139           0 :   virtual casacore::Bool useGenericSolveOne() { return false; }
     140             : 
     141             :   // Post solve tinkering
     142             :   virtual void globalPostSolveTinker();
     143             : 
     144             :   // Local implementation of selfSolveOne (generalized signature)
     145             :   // virtual void selfSolveOne(VisBuffGroupAcc& vbga);
     146             :   virtual void selfSolveOne(SDBList&);
     147             : 
     148             :   virtual void solveOneVB(const VisBuffer&);
     149             : 
     150             :   // SolveDataBuffer is being phased out; we no longer support it.
     151             :   // virtual void solveOneSDB(const SolveDataBuffer&);
     152             : 
     153           0 :   virtual casacore::Bool& zeroRates() { return zeroRates_; }
     154           0 :   virtual casacore::Bool& globalSolve() { return globalSolve_; } 
     155           0 :   virtual casacore::Int& maxits() { return maxits_; }
     156           0 :   virtual casacore::Array<casacore::Double>& delayWindow() { return delayWindow_; }
     157           0 :   virtual casacore::Array<casacore::Double>& rateWindow() { return rateWindow_; }
     158           0 :   virtual casacore::Array<casacore::Bool>& paramActive() { return paramActive_; }
     159           0 :   virtual casacore::Bool& concatSPWs() { return concatspws_; }
     160             :   
     161             :   // Apply reference antenna
     162             :   virtual void applyRefAnt();
     163             : 
     164           0 :   virtual casacore::Int& refant() { return refant_; }
     165             :   
     166             : protected:
     167             : 
     168             :   // phase, delay, rate
     169             :   //  TBD:  Need to cater for parameter opt-out  (e.g., no rate solve, etc.)
     170           0 :   virtual casacore::Int nPar() { return 8; };
     171             : 
     172             :   // Jones matrix elements are NOT trivial
     173           0 :   virtual casacore::Bool trivialJonesElem() { return false; };
     174             : 
     175             :   // dJ/dp are trivial
     176             :   //  TBD: make this default in SVC?
     177           0 :   virtual casacore::Bool trivialDJ() { return false; };
     178             : 
     179             :   // Initialize trivial dJs
     180             :   //  TBD: make this default in SVC?
     181           0 :   virtual void initTrivDJ() {};
     182             : 
     183             :   // Reference frequencies
     184             :   casacore::Vector<casacore::Double> KrefFreqs_;
     185             : 
     186             :   
     187             :   
     188             : private:
     189             : 
     190             :   // Pointer to CTRateAwareTimeInterp1 factory method
     191             :   // This ensures the rates are incorporated into the time-dep interpolation
     192           0 :   virtual CTTIFactoryPtr cttifactoryptr() { return &CTRateAwareTimeInterp1::factory; };
     193             :   void calculateSNR(casacore::Int, casa::DelayRateFFT&);
     194             : 
     195             :   casacore::Int refant_; // Override
     196             :   casacore::Bool zeroRates_;
     197             :   casacore::Bool globalSolve_;
     198             :   casacore::Array<casacore::Double> delayWindow_;
     199             :   casacore::Array<casacore::Double> rateWindow_;
     200             :   casacore::Array<casacore::Bool> paramActive_;
     201             :   casacore::Int maxits_;
     202             :   casacore::Bool concatspws_;
     203             : };
     204             : 
     205             : 
     206             : } //# NAMESPACE CASA - END
     207             : 
     208             : #endif