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MeasData.h
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//# MeasData.h: MeasData provides Measure computing data
//# Copyright (C) 1995,1996,1997,1999,2003
//# 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: casa-feedback@nrao.edu.
//# Postal address: AIPS++ Project Office
//# National Radio Astronomy Observatory
//# 520 Edgemont Road
//# Charlottesville, VA 22903-2475 USA
#ifndef MEASURES_MEASDATA_H
#define MEASURES_MEASDATA_H
//# Includes
#include <casacore/casa/aips.h>
namespace casacore { //# NAMESPACE CASACORE - BEGIN
//# Forward Declarations
class RotMatrix;
// <summary>
// MeasData provides Measure computing data
// </summary>
// <use visibility=local>
// <reviewed reviewer="UNKNOWN" date="before2004/08/25" tests="tMeasMath" demos="">
// </reviewed>
// <prerequisite>
// <li> <linkto class=Measure>Measure</linkto> class
// </prerequisite>
//
// <etymology>
// MeasData from Measure and Data
// </etymology>
//
// <synopsis>
// MeasData contains the constant data
// necessary for precession, nutation and other
// <linkto class=Measure>Measure</linkto> related calculations.<br>
// Database (Table) related data, or data that can be changed by the user,
// is available in the <linkto class=MeasTable>MeasTable</linkto> class. <br>
// All data. apart from a set of simple constants:
// <srcblock>
// MeasData::MJD2000
// MeasData::MJDB1950
// MeasData::MJDB1900
// MeasData::MJDB1850
// MeasData::TROPCEN
// MeasData::JDCEN
// MeasData::SECinDAY
// </srcblock>
// are obtained by calls to a method.
// This class contains no constructors or destructors, only static
// methods and (static) constants.
// <br> References:<br> Explanatory supplements to the Astronomical Almanac
// <br> C. Ron and J. Vondrak, Bull. Astron. Inst. Czechosl. 37, p96, 1986
// <br> M. Soma, Th. Hirayama and H. Kinoshita, Celest. Mech. 41, p389, 1988
// <br> V.S. Gubanov, Astron. Zh. 49, p1112, 1972 (English translation:
// Sov. Astronomy - AJ, Vol. 16, No. 5, p. 907)
// </synopsis>
//
// <example>
// Usage examples can be found in <linkto class=Precession>Precession</linkto>
// </example>
//
// <motivation>
// To create a clean interface between the actual calculations and the
// methods to obtain the parameters for these calculations. Note that the
// tables are in general in the format and units found in the literature. This
// is to be able to easy check and change them. However, in the future
// re-arrangement could produce faster and more compact code.
// </motivation>
//
// <todo asof="1997/04/17">
// <li> more precise data for VLBI and pulsar
// </todo>
class MeasData {
public:
//# Constants
// General constants
// <group>
// MJD of J2000.0
static const Double MJD2000;
// MJD of B1950.0
static const Double MJDB1950;
// MJD of B1900.0
static const Double MJDB1900;
// MJD of B1850.0
static const Double MJDB1850;
// Length Tropical century
static const Double TROPCEN;
// Length Julian century
static const Double JDCEN;
// Length of day in sec
static const Double SECinDAY;
// </group>
//# General Member Functions
// Get the rotation matrices for galactic coordinates
// <group>
static const RotMatrix &GALtoB1950();
static const RotMatrix &GALtoJ2000();
static const RotMatrix &J2000toGAL();
static const RotMatrix &B1950toGAL();
// </group>
// Get one of the 4 3x3 sub rotation matrices for B1950-J2000 conversions
// <group>
static const RotMatrix &MToB1950(uInt which);
static const RotMatrix &MToJ2000(uInt which);
// </group>
// Get the solar semi diameter at 1 AU in rad
static Double SunSemiDiameter();
// J2000 obliquity
static Double eps0J2000();
private:
//# Constructors
// Default constructor, NOT defined
MeasData();
// Copy assign, NOT defined
MeasData &operator=(const MeasData &other);
//# Destructor
// Destructor (NOT defined) and not declared to stop warning
// ~MeasData();
//# General member functions
};
} //# NAMESPACE CASACORE - END
#endif
casacore::MeasData::JDCEN
static const Double JDCEN
Length Julian century.
Definition MeasData.h:114
casacore::MeasData::MToB1950
static const RotMatrix & MToB1950(uInt which)
Get one of the 4 3x3 sub rotation matrices for B1950-J2000 conversions.
casacore::MeasData::MJDB1900
static const Double MJDB1900
MJD of B1900.0.
Definition MeasData.h:108
casacore::MeasData::B1950toGAL
static const RotMatrix & B1950toGAL()
casacore::MeasData::TROPCEN
static const Double TROPCEN
Length Tropical century.
Definition MeasData.h:112
casacore::MeasData::MJD2000
static const Double MJD2000
General constants.
Definition MeasData.h:104
casacore::MeasData::MeasData
MeasData()
Default constructor, NOT defined.
casacore::MeasData::J2000toGAL
static const RotMatrix & J2000toGAL()
casacore::MeasData::MJDB1950
static const Double MJDB1950
MJD of B1950.0.
Definition MeasData.h:106
casacore::MeasData::GALtoB1950
static const RotMatrix & GALtoB1950()
Get the rotation matrices for galactic coordinates.
casacore::MeasData::operator=
MeasData & operator=(const MeasData &other)
Copy assign, NOT defined.
casacore::MeasData::SECinDAY
static const Double SECinDAY
Length of day in sec.
Definition MeasData.h:116
casacore::MeasData::SunSemiDiameter
static Double SunSemiDiameter()
Get the solar semi diameter at 1 AU in rad.
casacore::MeasData::MJDB1850
static const Double MJDB1850
MJD of B1850.0.
Definition MeasData.h:110
casacore::MeasData::MToJ2000
static const RotMatrix & MToJ2000(uInt which)
casacore::MeasData::GALtoJ2000
static const RotMatrix & GALtoJ2000()
casacore::MeasData::eps0J2000
static Double eps0J2000()
J2000 obliquity.
casacore::RotMatrix
Definition RotMatrix.h:84
casacore
this file contains all the compiler specific defines
Definition mainpage.dox:28
casacore::uInt
unsigned int uInt
Definition aipstype.h:49
casacore::Double
double Double
Definition aipstype.h:53