casa6

//# SpectralElement.cc: Describes (a set of related) spectral lines

//# Copyright (C) 2001,2004

//# 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: SpectralElement.cc 21024 2011-03-01 11:46:18Z gervandiepen $

​

//# Includes

#include <components/SpectralComponents/GaussianSpectralElement.h>

​

#include <casa/BasicSL/Constants.h>

​

#include <scimath/Functionals/Gaussian1D.h>

​

#include <casa/iostream.h>

​

using namespace casacore;

namespace casa { //# NAMESPACE CASA - BEGIN

​

//# Constants

const Double GaussianSpectralElement::SigmaToFWHM = sqrt(8.0*C::ln2);

​

GaussianSpectralElement::GaussianSpectralElement()

: PCFSpectralElement(SpectralElement::GAUSSIAN, 1, 0, 2*sqrt(C::ln2)/C::pi) {

    _setFunction(

        std::shared_ptr<Gaussian1D<Double> >(

            new Gaussian1D<Double>(1, 0, 1)

        )

    );

}

​

​

GaussianSpectralElement::GaussianSpectralElement(

    const Double ampl, const Double center, const Double sigma

) : PCFSpectralElement(SpectralElement::GAUSSIAN, ampl, center, sigma) {

    _setFunction(

        std::shared_ptr<Gaussian1D<Double> >(

            new Gaussian1D<Double>(ampl, center, sigma*SigmaToFWHM)

        )

    );

}

​

GaussianSpectralElement::GaussianSpectralElement(