ConverterIntensity.h

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//# Copyright (C) 2005
//# 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
//#

#ifndef CONVERTERINTENSITY_H_
#define CONVERTERINTENSITY_H_

#include <QString>
#include <QList>
#include <casa/Arrays/Vector.h>
#include <coordinates/Coordinates/SpectralCoordinate.h>

namespace casa {

        class ConverterIntensity {
        public:
                static const QString FRACTION_OF_PEAK;
                static const QString KELVIN;
                static const QString JY_SR;
                static const QString JY_ARCSEC;
                static const QString JY_BEAM;
                static const QString JY;
                static const QString ADU;
                static const QString TIMES_PIXELS;
                static bool isSupportedUnits( const QString& yUnit );
                //Hertz values are needed corresponding to the values for Jy/Beam Kelvin conversions
                //only.  Both oldUnits and newUnits refer to the old and new units of the values
                //array.  In order to do FRACTION_OF_PEAK conversions, a maximum value with
                //corresponding maximum units must be passed in.
                static void convert( Vector<float>& values, const Vector<float> hertzValues,
                                     const QString& oldUnits, const QString& newUnits,
                                     double maxValue, const QString& maxUnits,
                                     double beamAngle, double beamArea, SpectralCoordinate coord );

                //Converts between Jy/Beam units.  For example, MJy/Beam <-> Jy/Beam
                static double convertJyBeams( const QString& sourceUnits, const QString& destUnits,
                                double value, SpectralCoordinate& coord );
                static double convertJY( const QString& oldUnits, const QString& newUnits,
                                double value, SpectralCoordinate& coord );
                static double convertJYSR( const QString& oldUnits,const QString& newUnits,
                                double value, SpectralCoordinate& coord );
                static double convertKelvin( const QString& oldUnits,const QString& newUnits,
                                double value, SpectralCoordinate& coord );
                virtual ~ConverterIntensity();

        private:
                ConverterIntensity();
                static double percentToValue( double yValue, double maxValue );
                static double valueToPercent( double yValue, double maxValue );
                static double convertQuantity( double yValue, double frequencyValue,
                                               const QString& oldUnits, const QString& newUnits,
                                               double beamSolidAngle, double beamArea );
                static void convertJansky( Vector<float>& values, const QString& oldUnits,
                                           const QString& newUnits, SpectralCoordinate& coord );
                static void convertKelvin( Vector<float>& values, const QString& oldUnits,
                                           const QString& newUnits, SpectralCoordinate& coord );
                static bool isJansky( const QString& units );
                static bool isKelvin( const QString& units );
                static double convertNonKelvinUnits( double yValue, const QString& oldUnits,
                                const QString& newUnits, double beamArea );
                static QString getJanskyBaseUnits( const QString& units );
                static QString getKelvinBaseUnits( const QString& units );
                static QString stripPixels( const QString& units );
                static double beamToArcseconds( double yValue, double beamArea );
                static double arcsecondsToBeam( double yValue, double beamArea );
                static double srToArcseconds( double yValue );
                static double arcsecondsToSr( double yValue );
                static const QList<QString> BEAM_UNITS;
                static const QList<QString> JY_UNITS;
                static const QList<QString> JY_SR_UNITS;
                static const QList<QString> KELVIN_UNITS;
                static const double SPEED_LIGHT_FACTOR;
                static const double FREQUENCY_FACTOR;
                static const double ARCSECONDS_PER_STERADIAN;
        };

} /* namespace casa */
#endif /* CONVERTERINTENSITY_H_ */