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//# Copyright (C) 1995-1999,2000-2004
//# 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
//#
//#
//# $Id$
#ifndef MEASURES_MEASTABLE_H
#define MEASURES_MEASTABLE_H
//# Includes
#include <casacore/casa/aips.h>
#include <casacore/measures/Measures/MeasTableMul.h>
#include <casacore/measures/Measures/MeasData.h>
#include <casacore/measures/Measures/MPosition.h>
#include <casacore/measures/Measures/MDirection.h>
#include <casacore/measures/Measures/MFrequency.h>
#include <casacore/scimath/Functionals/Polynomial.h>
#include <casacore/casa/OS/Mutex.h>
#include <vector>
namespace casacore { //# NAMESPACE CASACORE - BEGIN
//# Forward Declarations
class RotMatrix;
class Euler;
// <summary>
// MeasTable provides Measure computing database data
// </summary>
// <use visibility=local>
// <reviewed reviewer="UNKNOWN" date="before2004/08/25" tests="tMeasMath" demos="">
// </reviewed>
// <prerequisite>
// <li> <linkto class=Measure>Measure</linkto> class
// <li> <linkto class=MeasData>MeasData</linkto> class for constant data
// <li> <linkto class=Aipsrc>Aipsrc</linkto> class for data placement
// </prerequisite>
//
// <etymology>
// MeasTable from Measure and Table
// </etymology>
//
// <synopsis>
// MeasTable contains the database interface for all
// data necessary for precession, nutation and other
// <linkto class=Measure>Measure</linkto> related calculations.<br>
// All data are obtained by calls to a method. E.g.
// <src> fundArg(1) </src> will provide the first fundamental argument for
// nutation calculations, i.e. 'l'. <br>
// 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
//
// Where strings are passed in as arguments (observatory names, sources), they
// will be case insensitive, and minimum match.
// </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="1997/09/02">
// <li> more database interfaces, rather than constants
// </todo>
class MeasTable {
public:
//# Enumerations
// Types to be used in different calls
enum Types {
// Planetary information
MERCURY = 1,
VENUS = 2,
EARTH = 3,
MARS = 4,
JUPITER = 5,
SATURN = 6,
URANUS = 7,
NEPTUNE = 8,
PLUTO = 9,
MOON = 10,
SUN = 11,
// Solar system barycentre
BARYSOLAR = 12,
// Earth-Moon system barycentre
BARYEARTH = 13,
// Nutations
NUTATION = 14,
// Librations
LIBRATION = 15,
// Number of types
N_Types };
// Codes for JPL constants: order should be same as in MeasJPL, length less
// than or equal
enum JPLconst {
// Light velocity used in AU/d
CAU,
// Solar mass (GM0)/c<sup>2</sup> in AU
GMS,
// AU in km
AU,
// Solar radius in AU
RADS,
// # of codes
N_JPLconst };
//# General Member Functions
// Selection related data
// <group>
// Are the IAU2000 precession/nutation to be used or not (IAU1984)
static Bool useIAU2000();
// If IAU2000 model, do we use the high precision 2000A model?
static Bool useIAU2000A();
// </group>
// Precession related data
// <group>
// Get the precession-rate part of the IAU2000 precession-nutation models
// (which 0=dpsi (long) and 1=deps (obliquity) and 2 =0)
static Double precRate00(const uInt which);
// Get the frame bias matrix for IAU2000 model.
static RotMatrix frameBias00();
// Generate the precession calculation polynomials for a fixed Epoch T
// in the result area specified.
// T is given in Julian centuries since J2000.0.
static void
precessionCoef(Double T, Polynomial<Double> result[3]);
// Generate the precession polynomials for IAU2000 system.
static void
precessionCoef2000(Polynomial<Double> result[3]);
// Generate the precession polynomials for 1950 system for a fixed Epoch T
// in the area specified. T is given in Tropical centuries since B1850.0
static void
precessionCoef1950(Double T, Polynomial<Double> result[3]);
// </group>
// Nutation related data
// <group>
// Generate the polynomial for the fundamental arguments (eps, l, l',
// F, D, omega) as a function of Julian centuries
// <group>
static const Polynomial<Double> &fundArg(uInt which);
static const Polynomial<Double> &fundArg1950(uInt which);
static const Polynomial<Double> &fundArg2000(uInt which);
// </group>
// Get the planetary arguments (L, L', F, D, Om, Me, Ve, E, Ma, Ju Sa,
// Ur, Ne, pre)
static const Polynomial<Double> &planetaryArg2000(uInt which);
// Generate the which' vector of the nutation series arguments
// <group>
static const Double* mulArg(uInt which);
static const Double* mulArg1950(uInt which);
static const Double* mulArg2000A(uInt which);
static const Double* mulArg2000B(uInt which);
static const Double* mulPlanArg2000A(uInt which);
// </group>
// Generate the which' vector of the equation of equinoxes (IAU2000)
// complementary terms series arguments
static const Double* mulArgEqEqCT2000(uInt which);
// Generate the which' vector of the nutation series multipliers
// at T, measured in Julian centuries since J2000.0, respectively B1900.0
// <group>
static CountedPtr<Matrix<Double> > mulSC(Double time, Double epsilon);
static CountedPtr<Matrix<Double> > mulSC1950(Double time, Double epsilon);
static CountedPtr<Matrix<Double> > mulSC2000A(Double time, Double epsilon);
static CountedPtr<Matrix<Double> > mulSC2000B(Double time, Double epsilon);
static const Double* mulPlanSC2000A(uInt which);
// </group>
// Generate the which' vector of the equation of equinoxes (IAU2000)
// complementary terms series multipliers
// at T, measured in Julian centuries since J2000.0, respectively B1900.0
static const Double* mulSCEqEqCT2000(uInt which);
// Get nutation angles corrections for UTC T in rad.
// which = 0 : dPsi as given by IERS for IAU nutation theory;
// = 1: dEps as same.
static Double dPsiEps(uInt which, Double T);
// </group>
// Planetary (JPL DE) related data
// <group>
// Get the position (AU or rad) and velocity (AU/d or rad/d) for specified
// code at TDB T. The ephemeris to use (now DE200 or DE405) can be selected
// with the 'measures.jpl.ephemeris' aipsrc resource (default DE200).
static Vector<Double> Planetary(MeasTable::Types which,
Double T);
// Get the JPL DE constant indicated
static Double Planetary(MeasTable::JPLconst what);
// </group>
// Observatory positions
// <group>
// Initialise list of all observatories from Observatories table
static void initObservatories();
// Get list of all observatories
static const Vector<String> &Observatories();
// Get position of observatory nam (False if not present)
static Bool Observatory(MPosition &obs, const String &nam);
// Get _absolute_ path to AntennaResponses table of observatory
// <src>nam</src>. It returns False if no _valid_ path can be found or the
// observatory is unknown. If the observatory is known, antRespPath will
// be set to the entry in the AntennaResponses column of the
// Observatories table even if it doesn't describe a valid path; if the
// entry is not an absolute path, the data directory name will be
// prepended and validity verified.
static Bool AntennaResponsesPath(String &antRespPath, const String &nam);
// </group>
// Source list positions
// <group>
// Initialise list of all source from Sources table
static void initSources();
// Get list of all sources
static const Vector<String> &Sources();
// Get position of source <src>nam</src> (False if not present)
static Bool Source(MDirection &obs, const String &nam);
// </group>
// Rest frequencies
// <group>
// Initialise list from internal Table for now
static void initLines();
// Get list of all frequencies
static const Vector<String> &Lines();
// Get frequency of line name (False if not present)
static Bool Line(MFrequency &obs, const String &nam);
// </group>
// Initialise list of IGRF data
static void initIGRF();
// Earth magnetic field (IGRF) data
// Get the harmonic terms for specified time (mjd)
static Vector<Double> IGRF(Double t);
// Aberration related data
// <group>
// Generate the polynomial for the fundamental arguments (l1-l8, w, D, l,
// l', F) for the Ron/Vondrak aberration calculations as a function of
// Julian centuries(J2000), or the comparable ones for the Gubanov expansion
// (B1950).
// <group>
static const Polynomial<Double> &aberArg(uInt which);
static const Polynomial<Double> &aberArgDeriv(uInt which);
static const Polynomial<Double> &aber1950Arg(uInt which);
static const Polynomial<Double> &aber1950ArgDeriv(uInt which);
// </group>
// Generate the 'which' vector of the aberration series arguments
// <group>
static const Double* mulAberArg(uInt which);
static const Double* mulAber1950Arg(uInt which);
static const Double* mulAberSunArg(uInt which);
static const Double* mulAberEarthArg(uInt which);
// </group>
// Generate the 'which' vector of the aberration series multipliers
// at T, measured in Julian centuries since J2000.0 (or J1900.0, yes,
// J1900.0, for B1950).
// <group>
static CountedPtr<Matrix<Double> > mulAber(Double time, Double epsilon);
static CountedPtr<Matrix<Double> > mulAber1950(Double time, Double epsilon);
static const Vector<Double> &mulSunAber(uInt which);
static const Vector<Double> &mulEarthAber(uInt which);
// </group>
// Get the E-terms of Aberration correction (0 for position, 1 for velocity)
// <group>
static const Vector<Double> &AberETerm(uInt which);
// </group>
// </group>
// Diurnal aberration factor
static Double diurnalAber(Double radius, Double T);
// LSR (kinematical) velocity conversion: 0 gives J2000; 1 gives B1950.
// In both cases a velocity of 20.0 km/s is assumed, and a B1900 RA/Dec
// direction of (270,30) degrees. This value has been defined between
// the groups doing HI radio work in the mid 1950s.
static const Vector<Double> &velocityLSRK(uInt which);
// LSR (dynamical, IAU definition). Velocity (9,12,7) km/s in galactic
// coordinates. Or 16.552945 towards l,b = 53.13, +25.02 deg.
// 0 gives J2000, 1 gives B1950 velocities.
static const Vector<Double> &velocityLSR(uInt which);
// Velocity of LSR with respect to galactic centre. 220 km/s in direction
// l,b = 270, +0 deg. 0 returns J2000, 1 B1950
static const Vector<Double> &velocityLSRGal(uInt which);
// Velocity of Local Group wrt bary center (F.Ghigo): 308km/s towards
// l,b = 105,-7. 0 for J2000, 1 for B1950
static const Vector<Double> &velocityCMB(uInt which);
// Velocity of CMB wrt bary center (F.Ghigo): 369.5km/s towards
// l,b = 264.4,48.4. 0 for J2000, 1 for B1950
static const Vector<Double> &velocityLGROUP(uInt which);
// Earth and Sun position related data
// <group>
// Fundamental arguments for Soma et al. methods
// <group>
static const Polynomial<Double> &posArg(uInt which);
// Precomputed derivative of PosArg
static const Polynomial<Double> &posArgDeriv(uInt which);
// </group>
// Generate the which' vector of the position series arguments
// <group>
static const Double* mulPosEarthXYArg(uInt which);
static const Double* mulPosEarthZArg(uInt which);
static const Double* mulPosSunXYArg(uInt which);
static const Double* mulPosSunZArg(uInt which);
// </group>
// Generate the which' vector of the position series multipliers
// at T, measured in Julian centuries since J2000.0
// <group>
static CountedPtr<Matrix<Double> > mulPosEarthXY(Double time, Double epsilon);
static CountedPtr<Matrix<Double> > mulPosEarthZ (Double time, Double epsilon);
static CountedPtr<Matrix<Double> > mulPosSunXY (Double time, Double epsilon);
static CountedPtr<Matrix<Double> > mulPosSunZ (Double time, Double epsilon);
// </group>
// Get the rotation matrix to change position from ecliptic to rectangular
// for Soma et al. analytical expression
static const RotMatrix &posToRect();
// Get the rotation matrix to change position from rectangular to ecliptic
// for Soma et al. analytical expression
static const RotMatrix &rectToPos();
// Get the rotation matrix from galactic to supergalactic.
// Based on De Vaucouleurs 1976: Pole at 47.37/6.32 deg; 137.37 l0
// Euler angles: 90, 83.68, 47.37 degrees
static const RotMatrix &galToSupergal();
// Get the rotation matrix from ICRS to J2000/FK5.
// Based on the IAU 2000 resolutions (the bias matrix)
static const RotMatrix &ICRSToJ2000();
// </group>
// Position related routines
// <group>
// Equatorial radius (0) and flattening(1) of geodetic reference spheroids
static Double WGS84(uInt which);
// </group>
// Polar motion related routines
// <group>
// Get the polar motion (-x,-y,0)(2,1,3) angles at the given epoch
static Euler polarMotion(Double ut);
// </group>
// Time related routines
// <note>
// WARNING given if correction not obtainable
// </note>
// <thrown>
// <li> AipsError if table seems to be corrupted
// </thrown>
// <group>
// Give TAI-UTC (in s) for MJD utc UTC
static Double dUTC(Double utc);
// UT1-UTC (in s) for MJD tai TAI
static Double dUT1(Double utc);
// TDT-TAI (in s) for MJD tai TAI. Note this is equal to TT2000-TAI
static Double dTAI(Double tai=0.0);
// TDB-TDT (in s) for MJD ut1 UT1
static Double dTDT(Double ut1);
// TCB-TDB (in s) for MJD tai TAI
static Double dTDB(Double tai);
// TCG-TT (in s) for MJD tai TAI
static Double dTCG(Double tai);
// GMST1 at MJD ut1 UT1
static Double GMST0(Double ut1);
// GMST (IAU2000) including the ERA (IAU2000 Earth Rotation Angle) in rad
static Double GMST00(Double ut1, Double tt);
// Earth Rotation Angle (IAU2000) in rad
static Double ERA00(Double ut1);
// s' (IAU2000) in rad (approximate value)
static Double sprime00(Double tt);
// UT1 at GMSD gmst1 GMST1
static Double GMUT0(Double gmst1);
// Ratio UT1/MST at MJD ut1 UT1
static Double UTtoST(Double ut1);
// </group>
private:
// Copy assign, NOT defined
MeasTable &operator=(const MeasTable &other);
//# General member functions
static void doInitObservatories (void*);
static void doInitLines (void*);
static void doInitSources (void*);
static void doInitIGRF (void*);
// Calculate precessionCoef
// <group>
static void calcPrecesCoef(Double T, Polynomial<Double> result[3],
const Double coeff[3][6]);
static void calcPrecesCoef2000(Polynomial<Double> result[3],
const Double coeff[3][6]);
// </group>
// Calculate fundArg
// <group>
static void calcFundArg(volatile Bool &need, Polynomial<Double> result[6],
const Double coeff[6][4]);
static void calcFundArg00(volatile Bool &need, Polynomial<Double> result[6],
const Double coeff[6][5]);
static void calcPlanArg00(volatile Bool &need,
Polynomial<Double> result[14],
const Double coeff[8][2]);
// </group>
//# Data
// Multipliers for nutation, etc.
// <group>
static MeasTableMulSC theirMulSC;
static MeasTableMulSC1950 theirMulSC1950;
static MeasTableMulSC2000A theirMulSC2000A;
static MeasTableMulSC2000B theirMulSC2000B;
static MeasTableMulAber theirMulAber;
static MeasTableMulAber1950 theirMulAber1950;
static MeasTableMulPosSunXY theirMulPosSunXY;
static MeasTableMulPosSunZ theirMulPosSunZ;
static MeasTableMulPosEarthXY theirMulPosEarthXY;
static MeasTableMulPosEarthZ theirMulPosEarthZ;
// </group>
// Observatories table data
// <group>
static MutexedInit obsMutexedInit;
static Vector<String> obsNams;
static Vector<MPosition> obsPos;
static Vector<String> antResponsesPath;
// </group>
// Spectral line table data
// <group>
static MutexedInit lineMutexedInit;
static Vector<String> lineNams;
static Vector<MFrequency> linePos;
// </group>
// Sources table data
// <group>
static MutexedInit srcMutexedInit;
static Vector<String> srcNams;
static Vector<MDirection> srcPos;
// </group>
// IGRF data
// <group>
static MutexedInit igrfMutexedInit;
static Double dtimeIGRF;
static Double firstIGRF;
static Double lastIGRF;
static Double time0IGRF;
static Double timeIGRF;
static std::vector<Vector<Double> > coefIGRF;
static std::vector<Vector<Double> > dIGRF;
// </group>
// Aipsrc registration (for speed) of use of iau2000 and if so
// the 2000a version
// <group>
static uInt iau2000_reg;
static uInt iau2000a_reg;
// </group>
// Mutex for thread-safety.
static Mutex theirMutex;
};
} //# NAMESPACE CASACORE - END
#endif
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