Line data    Source code

       1             : //# FTMachine.cc: Implementation of FTMachine class
       2             : //# Copyright (C) 1997,1998,2000,2001
       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 addressed 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             : //# $Id$
      27             : 
      28             : #include <msvis/MSVis/VisibilityIterator.h>
      29             : #include <msvis/MSVis/VisBuffer.h>
      30             : #include <casacore/casa/Quanta/Euler.h>
      31             : #include <casacore/casa/Quanta/RotMatrix.h>
      32             : #include <casacore/measures/Measures/MDirection.h>
      33             : #include <casacore/ms/MeasurementSets/MSColumns.h>
      34             : #include <casacore/casa/BasicSL/Constants.h>
      35             : #include <synthesis/TransformMachines/ComponentFTMachine.h>
      36             : #include <msvis/MSVis/VisBuffer.h>
      37             : #include <casacore/casa/Arrays/ArrayMath.h>
      38             : #include <casacore/casa/Arrays/MatrixMath.h>
      39             : #include <casacore/casa/Arrays/Array.h>
      40             : #include <casacore/casa/Arrays/Vector.h>
      41             : #include <casacore/casa/Arrays/Matrix.h>
      42             : #include <casacore/casa/BasicSL/String.h>
      43             : #include <casacore/casa/Utilities/Assert.h>
      44             : #include <casacore/casa/Exceptions/Error.h>
      45             : #include <casacore/measures/Measures/UVWMachine.h>
      46             : #include <casacore/ms/MeasurementSets/MSColumns.h>
      47             : #include <casacore/casa/OS/Timer.h>
      48             : 
      49             : using namespace casacore;
      50             : namespace casa { //# NAMESPACE CASA - BEGIN
      51             : 
      52             : //---------------------------------------------------------------------- 
      53           2 :   ComponentFTMachine::ComponentFTMachine() : numthreads_p(-1), phaseCenterTime_p(-1.0)
      54             : {
      55           2 : }
      56             : 
      57           0 : LogIO& ComponentFTMachine::logIO() {return logIO_p;};
      58             : 
      59             : //---------------------------------------------------------------------- 
      60             : ComponentFTMachine&
      61           0 : ComponentFTMachine::operator=(const ComponentFTMachine& other)
      62             : {
      63             :   if(this!=&other) {
      64             :   };
      65           0 :   return *this;
      66             : };
      67             : 
      68             : //----------------------------------------------------------------------
      69           0 : ComponentFTMachine::ComponentFTMachine(const ComponentFTMachine& other)
      70             : {
      71           0 :   operator=(other);
      72           0 : }
      73             : 
      74             : //----------------------------------------------------------------------
      75           0 : ComponentFTMachine::~ComponentFTMachine() {
      76           0 : }
      77             : 
      78           0 : void ComponentFTMachine::setnumthreads(const Int numthreads){
      79           0 :     numthreads_p=numthreads;
      80           0 : }
      81             : 
      82         200 : void ComponentFTMachine::rotateUVW(Matrix<Double>& uvw, Vector<Double>& dphase,
      83             :                                    const VisBuffer& vb,
      84             :                                    const MDirection& mDesired)
      85             : {
      86             : 
      87             :   // 1. We need to convert this type (e.g. MDirection::SUN to the
      88             :   // type observed (e.g. MDirection::J2000). So first we get
      89             :   // the type and combine it with the specified frame that includes
      90             :   // the observing epoch. So we end up with e.g. the position of
      91             :   // the Sun on the specified epoch, expressed in J2000 coordinates.
      92             :   // We also add an MPosition as well so that for compact arrays we
      93             :   // can specify images in e.g. AZEL or HADEC.
      94             :   
      95             : 
      96         400 :   MeasFrame mFrame((MEpoch(Quantity(vb.time()(0), 
      97         400 :                                     vb.msColumns().timeQuant()(0).getUnit() ), 
      98         400 :                            vb.msColumns().timeMeas()(0).getRef())), 
      99         600 :                    vb.msColumns().antenna().positionMeas()(0));
     100             : 
     101         200 :   UVWMachine uvwMachine(mDesired, vb.phaseCenter(phaseCenterTime_p), mFrame,
     102         400 :                         false, true);
     103             : 
     104             :   // Now we convert all rows and also calculate the
     105             :   // change in phase
     106         200 :   uInt nrows=dphase.nelements();
     107         400 :   Vector<Double> thisRow(3);
     108         200 :   thisRow=0.0;
     109             :   uInt i;
     110       70400 :   for (uInt row=0;row<nrows;row++) {
     111      280800 :     for (i=0;i<3;i++) thisRow(i)=uvw(i,row);
     112       70200 :     uvwMachine.convertUVW(dphase(row), thisRow);
     113      280800 :     for (i=0;i<3;i++) uvw(i,row)=thisRow(i);
     114             :   }
     115             : 
     116         200 : }
     117             : 
     118           0 : void ComponentFTMachine::rotateUVW(Double*& uvw, Double*& dphase, const Int nrows, 
     119             :                                    const VisBuffer& vb,
     120             :                                    const MDirection& mDesired)
     121             : {
     122             : 
     123             :   // 1. We need to convert this type (e.g. MDirection::SUN to the
     124             :   // type observed (e.g. MDirection::J2000). So first we get
     125             :   // the type and combine it with the specified frame that includes
     126             :   // the observing epoch. So we end up with e.g. the position of
     127             :   // the Sun on the specified epoch, expressed in J2000 coordinates.
     128             :   // We also add an MPosition as well so that for compact arrays we
     129             :   // can specify images in e.g. AZEL or HADEC.
     130           0 :   MeasFrame mFrame((MEpoch(Quantity(vb.time()(0), vb.msColumns().timeQuant()(0).getUnit()), vb.msColumns().timeMeas()(0).getRef())), vb.msColumns().antenna().positionMeas()(0));
     131             : 
     132             : 
     133           0 :   UVWMachine uvwMachine(mDesired, vb.phaseCenter(phaseCenterTime_p), mFrame,
     134           0 :                         false, true);
     135             : 
     136             :   // Now we convert all rows and also calculate the
     137             :   // change in phase
     138           0 :   Vector<Double> thisRow(3);
     139           0 :   thisRow=0.0;
     140             :   uInt i;
     141           0 :   for (Int row=0;row<nrows;row++) {
     142           0 :     for (i=0;i<3;i++) thisRow(i)=uvw[row*3+i];
     143           0 :     uvwMachine.convertUVW(dphase[row], thisRow);
     144           0 :     for (i=0;i<3;i++) uvw[row*3+i]=thisRow(i);
     145             :   }
     146             : 
     147           0 : }
     148             : 
     149           0 : void ComponentFTMachine::ok() {
     150           0 : }
     151             : 
     152             : 
     153             : 
     154             : 
     155             : 
     156             : 
     157             : } //# NAMESPACE CASA - END
     158             :