/usr/include/casacore/ms/MSOper/MSDerivedValues.h is in casacore-dev 2.2.0-2.
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//# Copyright (C) 1997,1999,2000
//# Associated Universities, Inc. Washington DC, USA.
//#
//# This library is free software; you can redistribute it and/or modify it
//# under the terms of the GNU Library General Public License as published by
//# the Free Software Foundation; either version 2 of the License, or (at your
//# option) any later version.
//#
//# This library is distributed in the hope that it will be useful, but WITHOUT
//# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
//# FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
//# License for more details.
//#
//# You should have received a copy of the GNU Library General Public License
//# along with this library; if not, write to the Free Software Foundation,
//# Inc., 675 Massachusetts Ave, Cambridge, MA 02139, USA.
//#
//# Correspondence concerning AIPS++ should be addressed as follows:
//# Internet email: aips2-request@nrao.edu.
//# Postal address: AIPS++ Project Office
//# National Radio Astronomy Observatory
//# 520 Edgemont Road
//# Charlottesville, VA 22903-2475 USA
//#
//#
//# $Id$
#ifndef MS_MSDERIVEDVALUES_H
#define MS_MSDERIVEDVALUES_H
#include <casacore/casa/aips.h>
#include <casacore/casa/Arrays/Vector.h>
#include <casacore/measures/Measures.h>
#include <casacore/measures/Measures/MCDirection.h>
#include <casacore/measures/Measures/MDoppler.h>
#include <casacore/measures/Measures/MFrequency.h>
#include <casacore/measures/Measures/MCEpoch.h>
#include <casacore/measures/Measures/MCRadialVelocity.h>
#include <casacore/measures/Measures/MPosition.h>
#include <casacore/ms/MeasurementSets/MeasurementSet.h>
namespace casacore { //# NAMESPACE CASACORE - BEGIN
//# Forward Declarations
class ROMSAntennaColumns;
class String;
// <summary>
// MSDerivedValues calculates values derived from a MS
// </summary>
// <use visibility=export>
// <reviewed reviewer="" date="yyyy/mm/dd" tests="" demos="">
// </reviewed>
// <prerequisite>
// <li> MeasurementSet
// <li> SomeOtherClass
// <li> some concept
// </prerequisite>
//
// <etymology>
// MSDerivedValues calculates values derived from those in a MS
// </etymology>
//
// <synopsis>
// MSDerivedValues is a class that computes values derived from those present
// in a MeasurementSet. E.g., calculate feed position angles on the sky from
// time, antenna positions and feed characteristics.
// </synopsis>
//
// <example>
// <srcblock>
// // calculate the parallactic angle and the observatory velocity for the
// // first time and first source in the MS.
// // set up
// MSDerivedValues msd;
// MS myMS("myMS");
// ROMSColumns msc(myMS);
// msd.setAntennas(msc.antenna());
// MEpoch ep=MS::epochMeasure(msc.time());
// ep.set(MVEpoch(Quantity(msc.time()(0),"s")));
// msd.setEpoch(ep);
// MDirection dir=MS::directionMeasure(msc.field().phaseDir());
// dir.set(MVDirection(Vector<Double>(msc.field().phaseDir()(0))));
// msd.setFieldCenter(dir);
// msd.setVelocityFrame(MRadialVelocity::LSRK);
// // now we are ready for the calculations:
// Double parAngle = msd.parangle();
// MRadialVelocity observatoryVel = msd.obsVel();
// </srcblock>
// </example>
//
// <motivation>
// Values derived from those in a MS are needed in various places, e.g., for
// plotting purposes. This class combines the commonly needed calculations
// in one place.
// </motivation>
//
// <thrown>
// <li>
// <li>
// </thrown>
//
// <todo asof="1997/05/30">
// <li> the interface should be less cumbersome
// <li> probably needs speeding up
// </todo>
class MSDerivedValues
{
friend class VisBufferAsync; // to work around dysfunctional operator= and
// thread-hostile shared pointers (Jim Jacobs 111104)
public:
MSDerivedValues();
~MSDerivedValues();
// Copy constructor, this will initialize with other's MS
MSDerivedValues(const MSDerivedValues& other);
// Assignment, this will initialize with other's MS
MSDerivedValues& operator=(const MSDerivedValues& other);
// Set antenna position from an antenna table
// Returns the number of antennas. Also
// sets the observatory position to the average of the antenna positions.
Int setAntennas(const ROMSAntennaColumns& ac);
// Set antenna positions, index in vector is antenna number
// for calls below.
MSDerivedValues& setAntennaPositions(const Vector<MPosition>& antPosition);
const Vector<MPosition> & getAntennaPositions () const;
// Set the observatory position. Note that setAntennas will reset this.
MSDerivedValues& setObservatoryPosition(const MPosition& obsPosition);
// Set antenna mounts, should have same number of entries as
// antPosition in setAntennaPosition
MSDerivedValues& setAntennaMount(const Vector<String>& mount);
// Set epoch
MSDerivedValues& setEpoch(const MEpoch& time);
// Set field center
MSDerivedValues& setFieldCenter(const MDirection& fieldCenter);
//If you have used setMeasurementSet then this version of
//setFieldCenter using field id makes sense
MSDerivedValues& setFieldCenter(uInt fieldid=0);
// Set antenna index, sets the position reference for the conversions.
// Use -1 to set the reference frame to the observatory position.
MSDerivedValues& setAntenna(Int antenna);
// Set the velocity frame type (e.g., MRadialVelocity::LSRK)
MSDerivedValues& setVelocityFrame(MRadialVelocity::Types vType);
// Set the velocity frame type (e.g., MRDoppler::RADIO)
MSDerivedValues& setVelocityReference(MDoppler::Types dopType);
MRadialVelocity::Types getRadialVelocityType () const;
// Set the frequency frame (e.g., MFrequency::LSRK)
MSDerivedValues& setFrequencyReference(MFrequency::Types frqType);
// get hour angle
Double hourAngle();
// get parallactic angle
Double parAngle();
// get azimuth & elevation
const MDirection& azel();
// get LAST for given time, antenna
const MEpoch& last();
// get observatory radial velocity for given epoch, position and direction
const MRadialVelocity& obsVel();
//Set an ms does not need to explicity setAntennas and is necessary if
//setRestFreqency(fieldid, spwid) is used
MSDerivedValues& setMeasurementSet(const MeasurementSet& ms);
//Set restFrequencies...make it look for it for the fieldid, spwid and line
//number defined in the SOURCE table return False if it fails to find the
//restFrquency
Bool setRestFrequency(const Int fieldid, const Int spwid,
const Int linenum=0);
//
MSDerivedValues& setRestFrequency(const Quantity& restFreq);
// get frequency from velocity
Quantity toFrequency(const Quantity& vel, const Quantity& restFreq);
Quantity toFrequency(const Quantity& vel);
// get velocity from frequency
Quantity toVelocity(const Quantity& freq, const Quantity& restFreq);
Quantity toVelocity(const Quantity& freq);
protected:
private:
// initialize data
void init();
Int antenna_p;
MEpoch::Convert cUTCToLAST_p;
Vector<MPosition> mAntPos_p;
MDirection::Convert cRADecToAzEl_p;
MDirection::Convert cHADecToAzEl_p;
MDirection::Convert cRADecToHADec_p;
MeasFrame fAntFrame_p;
MDirection mRADecInAzEl_p;
MDirection mHADecPoleInAzEl_p;
MDirection mFieldCenter_p;
MPosition mObsPos_p;
MRadialVelocity::Convert cTOPOToLSR_p;
MDoppler::Ref velref_p;
MFrequency::Ref frqref_p;
Bool hasMS_p;
Quantity restFreq_p;
Vector<Int> mount_p;
MeasurementSet ms_p;
MRadialVelocity::Types radialVelocityType_p;
// Vector<Double> receptorAngle_p;
};
} //# NAMESPACE CASACORE - END
#endif
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