00001 //# EVLASwPow.h: Declaration of EVLA Switched Power Calibration 00002 //# Copyright (C) 1996,1997,2000,2001,2002,2003 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 00028 #ifndef SYNTHESIS_EVLASWPOW_H 00029 #define SYNTHESIS_EVLASWPOW_H 00030 00031 #include <casa/aips.h> 00032 #include <casa/Containers/Record.h> 00033 #include <casa/BasicSL/Complex.h> 00034 #include <synthesis/MeasurementComponents/VisCal.h> 00035 #include <synthesis/MeasurementComponents/SolvableVisCal.h> 00036 #include <synthesis/MeasurementComponents/StandardVisCal.h> 00037 00038 namespace casa { //# NAMESPACE CASA - BEGIN 00039 00040 // Forward declarations 00041 class VisEquation; 00042 00043 00044 // ********************************************************** 00045 // EVLA switched power Gain and Tsys 00046 // 00047 00048 00049 class EVLASwPow : public GJones { 00050 public: 00051 00052 enum SPType{SWPOW,EVLAGAIN=SWPOW,RQ,SWPOVERRQ,NONE}; 00053 00054 static SPType sptype(String name); 00055 static String sptype(SPType sptype); 00056 00057 // Constructor 00058 EVLASwPow(VisSet& vs); 00059 EVLASwPow(String msname,Int MSnAnt,Int MSnSpw); 00060 EVLASwPow(const MSMetaInfoForCal& msmc); 00061 EVLASwPow(const Int& nAnt); 00062 00063 virtual ~EVLASwPow(); 00064 00065 // Return the type enum (for now, pretend we are G) 00066 virtual Type type() { return VisCal::G; }; 00067 00068 // EVLA Gain and Tsys are Float parameters 00069 virtual VisCalEnum::VCParType parType() { return VisCalEnum::REAL; }; 00070 00071 // Return type name as string (ditto) 00072 virtual String typeName() { return "G EVLASWPOW"; }; 00073 virtual String longTypeName() { return "G EVLASWPOW (Switched-power gain)"; }; 00074 00075 // Local setSpecify 00076 using GJones::setSpecify; 00077 virtual void setSpecify(const Record& specify); 00078 00079 // Specific specify() that reads the SYSCAL subtable 00080 virtual void specify(const Record& specify); 00081 00082 // In general, we are freq-dep 00083 virtual Bool freqDepPar() { return False; }; 00084 00085 00086 protected: 00087 00088 // There are 4 parameters (Gain and Tsys for each pol) 00089 virtual Int nPar() { return 4; }; 00090 00091 // The parameter array is not (just) the Jones matrix element array 00092 virtual Bool trivialJonesElem() { return False; }; 00093 00094 // Calculate Jones matrix elements (slice out the gains) 00095 virtual void calcAllJones(); 00096 00097 // Synchronize the weight-scaling factors 00098 // Weights are multiplied by 1/Tsys(K) per antenna 00099 virtual void syncWtScale(); 00100 00101 // Experimenting with updateWt 00102 //virtual void updateWt(Matrix<Float>& wt,const Int& a1,const Int& a2); 00103 00104 private: 00105 00106 // Fill the Tcals from the CALDEVICE table 00107 void fillTcals(); 00108 00109 // The name of the SYSCAL table 00110 String sysPowTabName_,calDevTabName_; 00111 00112 // Tcal storage 00113 Cube<Float> tcals_; 00114 00115 // Digital factors for the EVLA 00116 Float correff_; // net corr efficiency (lossy) 00117 Float frgrotscale_; // fringe rotation scale (lossless) 00118 Float nyquist_; // 2*dt*dv 00119 00120 // Effective per-chan BW, per spw for weight calculation 00121 Vector<Double> effChBW_; 00122 00123 }; 00124 00125 00126 00127 00128 } //# NAMESPACE CASA - END 00129 00130 #endif 00131