A Measure: astronomical direction. More...

#include <MDirection.h>

Inheritance diagram for casacore::MDirection:

Public Types
enum	Types { J2000, JMEAN, JTRUE, APP, B1950, B1950_VLA, BMEAN, BTRUE, GALACTIC, HADEC, AZEL, AZELSW, AZELGEO, AZELSWGEO, JNAT, ECLIPTIC, MECLIPTIC, TECLIPTIC, SUPERGAL, ITRF, TOPO, ICRS, N_Types, MERCURY, VENUS, MARS, JUPITER, SATURN, URANUS, NEPTUNE, PLUTO, SUN, MOON, COMET, N_Planets, EXTRA, DEFAULT, AZELNE, AZELNEGEO }
	Types of known MDirections Warning: The order defines the order in the translation matrix FromTo in the getConvert routine; Do not change the order without changing the array; Additions should be made before N_types, and an additional row and column should be coded in FromTo, and in showType(); More...

enum	GlobalTypes { GRADEC, GHADEC, GAZEL, GLONGLAT, N_GTypes }
	Global types. More...

typedef MVDirection	MVType
	Measure value container for this class (i.e. More...

typedef MCDirection	MCType
	Measure conversion routines for this class (i.e. More...

typedef MeasRef< MDirection >	Ref
	Measure reference (i.e. More...

typedef MeasConvert< MDirection >	Convert
	Measure Convert (i.e. More...

typedef ScalarMeasColumn < MDirection >	ScalarColumn
	Measure table Columns (e.g., MDirection::ScalarColumn) More...

typedef ArrayMeasColumn < MDirection >	ArrayColumn

Public Types inherited from casacore::Measure
enum	Types { N_Types, DEFAULT }
	Each derived class should have a `Types` enumeration, specifying the recognised frame types. More...

typedef void *	Convert
	Each Measure should have typedefs of the form: More...

Public Member Functions
	MDirection ()
	Tip: In the following constructors and other functions, all MeasRef* can be replaced with simple `Measure::TYPE` where no offsets or frames are needed in the reference;* Default constructor; generates the J2000 pole direction More...

	MDirection (const MVDirection &dt)
	Create from data and reference. More...

	MDirection (const MVDirection &dt, const MDirection::Ref &rf)

	MDirection (const MVDirection &dt, MDirection::Types rf)

	MDirection (const Quantity &dt, const Quantity &dt1)

	MDirection (const Quantity &dt, const Quantity &dt1, const MDirection::Ref &rf)

	MDirection (const Quantity &dt, const Quantity &dt1, MDirection::Types rf)

	MDirection (const Quantum< Vector< Double > > &dt)

	MDirection (const Quantum< Vector< Double > > &dt, const MDirection::Ref &rf)

	MDirection (const Quantum< Vector< Double > > &dt, MDirection::Types rf)

	MDirection (const Measure *dt)

	MDirection (const MeasValue *dt)

	MDirection (const MDirection::Ref &rf)

	MDirection (MDirection::Types rf)

virtual	~MDirection ()

virtual const String &	tellMe () const
	Tell me your type ('Direction') More...

Bool	giveMe (MDirection::Ref &mr, const String &in)

virtual Bool	setOffset (const Measure &in)
	Set the offset in the reference (False if non-matching Measure) More...

virtual Bool	setRefString (const String &in)
	Set the reference type to the specified String. More...

virtual const String &	getDefaultType () const
	Get the default reference type. More...

virtual const String *	allTypes (Int &nall, Int &nextra, const uInt *&typ) const
	Get a list of all known reference codes. More...

virtual void	checkTypes () const
	Check if all internal tables of types (both enum and String) are complete and correct. More...

virtual String	getRefString () const
	Get the reference type (for records, including codes like R_) More...

virtual Bool	isModel () const
	Tell me if you are a pure model (e.g. More...

Quantum< Vector< Double > >	getAngle () const
	Get Measure data. More...

Quantum< Vector< Double > >	getAngle (const Unit &inunit) const

void	shift (const Quantum< Double > &lng, const Quantum< Double > &lat, Bool trueAngle=False)
	Shift the direction in longitude (radians if Double) and/or latitude. More...

void	shift (Double lng, Double lat, Bool trueAngle=False)

void	shiftLongitude (const Quantity &lng, Bool trueAngle=False)

void	shiftLongitude (Double lng, Bool trueAngle=False)

void	shiftLatitude (const Quantum< Double > &lat, Bool trueAngle=False)

void	shiftLatitude (Double lat, Bool trueAngle=False)

void	shift (const MVDirection &shft, Bool trueAngle=False)

void	shiftAngle (const Quantum< Double > &off, const Quantum< Double > &pa)
	Shift over an angle off in the direction pa. More...

void	shiftAngle (Double off, Double pa)

virtual Measure *	clone () const
	Make a copy. More...

String	toString () const
	Convert to a String in astronomer-friendly format based on reference frame. More...

Public Member Functions inherited from casacore::MeasBase< MVDirection, MeasRef< MDirection > >
	MeasBase ()
	Tip: In the following constructors and other functions, all MeasRef can be replaced with simple `Measure::TYPE` where no offsets or frames are needed in the reference; For reasons of compiler limitations the formal arguments had to be specified as uInt rather than the Measure enums that should be used as actual arguments; Default constructor More...

	MeasBase (const MeasBase< MVDirection, MeasRef< MDirection > > &other)
	Copy constructor. More...

	MeasBase (const MVDirection &dt, const MeasRef< MDirection > &rf)
	Create from data and reference. More...

	MeasBase (const MVDirection &dt, uInt rf)

	MeasBase (const Quantity &dt, const MeasRef< MDirection > &rf)

	MeasBase (const Quantity &dt, uInt rf)

	MeasBase (const Measure *dt)

	MeasBase (const MeasRef< MDirection > &rf)

	MeasBase (const uInt rf)

MeasBase< MVDirection, MeasRef < MDirection > > &	operator= (const MeasBase< MVDirection, MeasRef< MDirection > > &other)
	Copy assignment. More...

virtual	~MeasBase ()

virtual Bool	areYou (const String &tp) const
	Check the type of derived entity. More...

virtual void	assured (const String &tp) const
	Assert that we are the correct type. More...

void	set (const MVDirection &dt)
	Refill the specified entities. More...

void	set (const MeasRef< MDirection > &rf)

void	set (const MVDirection &dt, const MeasRef< MDirection > &rf)

void	set (const Unit &inunit)

virtual void	set (const MeasValue &dt)
	Each Measure should have the following set functions (with appropiate MVs and Ref): More...

virtual Bool	putValue (const Vector< Quantum< Double > > &in)

MeasRef< MDirection >	getRef () const
	Get reference. More...

const MVDirection &	getValue () const
	Get Measure data. More...

const Unit &	getUnit () const
	Get Unit. More...

virtual MRBase *	getRefPtr () const
	Get reference pointer. More...

virtual const MeasValue *	getData () const
	Get pointer to data. More...

virtual void	print (std::ostream &os) const
	Print a Measure. More...

Public Member Functions inherited from casacore::Measure
virtual	~Measure ()
	Destructor. More...

void	dummy_giveMe () const
	Each derived class should have a string-to-code translation routine for the reference type. More...

void	dummy_getRef () const
	Each class should have a function to return its reference: More...

void	dummy_getValue () const
	Each derived class should be able to get its internal value and have: More...

Static Public Member Functions
static MDirection	makeMDirection (const String &sourceName)
	Make an MDirection object given the case-insensitive name of a moving source (ZENITH, SUN, etc.), or of a known standard source (CygA, etc.). More...

static const String &	showMe ()

static void	assure (const Measure &in)
	Assert you are a direction. More...

static MDirection::GlobalTypes	globalType (uInt tp)
	Tell me the global type (like GRADEC) for tp (tp like MDirection::J2000) More...

static MDirection::Types	castType (uInt tp)
	Translate reference code tp. More...

static const String &	showType (MDirection::Types tp)

static const String &	showType (uInt tp)

static Bool	getType (MDirection::Types &tp, const String &in)
	Translate string to reference code. More...

static const String *	allMyTypes (Int &nall, Int &nextra, const uInt *&typ)

static void	checkMyTypes ()

Static Public Member Functions inherited from casacore::Measure
static uInt	giveMe (const String &in, Int N_name, const String tname[])
	A general string checking routine to be used in derived measures. More...

Friends
class	MeasConvert< MDirection >
	Conversion of data. More...

Additional Inherited Members
Protected Attributes inherited from casacore::MeasBase< MVDirection, MeasRef< MDirection > >
MVDirection	data
	The measure value (e.g. More...

MeasRef< MDirection >	ref
	Reference frame data. More...

Unit	unit
	Possible input units. More...

Detailed Description

A Measure: astronomical direction.

Intended use:

Public interface

Review Status

Reviewed By:: UNKNOWN
Date Reviewed:: before2004/08/25
Test programs:: tMeasure

Prerequisite

Measure class

Etymology

Synopsis

MDirection forms a derived Measure class for a direction in space.
An MDirection can be generated from a MVDirection or a pair of Quantities specifying a longitudinal and a latitudinal angle.
The different reference types that can be used for a Direction are:

MDirection::J2000 – mean equator and equinox at J2000.0 (FK5)
MDirection::JNAT — geocentric natural frame
MDirection::JMEAN – mean equator and equinox at frame epoch
MDirection::JTRUE – true equator and equinox at frame epoch
MDirection::APP -— apparent geocentric position
MDirection::B1950 – mean epoch and ecliptic at B1950.0. The epoch is taken from the frame epoch; or from the aipsrc variable measures.b1950.d_epoch; or has default 2000.0
MDirection::B1950_VLA – mean epoch(1979.9)) and ecliptic at B1950.0
MDirection::BMEAN – mean equator and equinox at frame epoch
MDirection::BTRUE – true equator and equinox at frame epoch
MDirection::GALACTIC – galactic coordinates
MDirection::HADEC – topocentric HA and declination
MDirection::AZEL — topocentric Azimuth and Elevation (N through E)
MDirection::AZELSW - topocentric Azimuth and Elevation (S through W)
MDirection::AZELNE - topocentric Azimuth and Elevation (N through E)
MDirection::AZELGEO — geodetic Azimuth and Elevation (N through E)
MDirection::AZELSWGEO - geodetic Azimuth and Elevation (S through W)
MDirection::AZELNEGEO - geodetic Azimuth and Elevation (N through E)
MDirection::ECLIPTC – ecliptic for J2000 equator and equinox
MDirection::MECLIPTIC – ecliptic for mean equator of date
MDirection::TECLIPTIC – ecliptic for true equator of date
MDirection::SUPERGAL – supergalactic coordinates
MDirection::ITRF – coordinates wrt ITRF Earth frame
MDirection::TOPO – apparent topocentric position
MDirection::ICRS – International Celestial reference system
MDirection::MERCURY – the planet: has no data attached
MDirection::VENUS
MDirection::MARS
MDirection::JUPITER
MDirection::SATURN
MDirection::URANUS
MDirection::NEPTUNE
MDirection::PLUTO
MDirection::SUN
MDirection::MOON
MDirection::COMET – solar system body: no coordinates attached, only table
MDirection::DEFAULT = J2000

Conversion between the different types is done with the standard MeasConvert class (MDirection::Convert in this case).
For some conversion additional MeasFrame information is essential. The following list specifies which information is needed if the conversion goes to or from the different types:

Epoch: all but J2000, B1950, GALACTIC, SUPGAL, ECLIPTIC, ICRS
Positiom: HADEC, AZEL, AZELGEO

The conversion between B1950 and J2000 may have an Epoch. If none given an epoch of 2000.0 is assumed for the conversion, unless an aipsrc variable measures.b1950.d_epoch is given.

Conversions are based on the IAU system of precession and nutation (with IERS corrections if available); and on series expansions of the DE200 planetary ephemeris (J system; for B sytem older expansions) for the aberration and the solar position.
The HADEC position has corrections for polar motion and the equation of equinoxes; the AZEL will include Earth tides and refraction at a later stage.
Note that conversion between B1950 and J2000 can only be approximate, and is based on FK4 to FK5 conversion. The best conversion is to convert first to an apparent position at the time of observation, and convert from there to the other standard (the correct route will be followed).
Another problem can arise if the source has proper motion and/or radial velocities. These should be taken into account. An MCatalog class will maybe take care of that.
Warning: The offset that can be specified in the MDirection::Ref is an MDirection offset, and can not be used for specifying angular offsets; shift() methods are available for these cases;

To aid in formatting of the angles without having to check all difference referencetypes, the following global types are provided:

GRADEC for types that are probably expressed in HM,DM
GHADEC for types that are probably expressed in +-HM,DM
GAZEL for types that are probably expressed in +-deg,deg
GLONGLAT for types that are probably expressed in deg,deg

they can be obtained with the globalType() method.

Example

See Measures module description for extensive examples.

Motivation

To Do

Definition at line 174 of file MDirection.h.

Member Typedef Documentation

typedef ArrayMeasColumn<MDirection> casacore::MDirection::ArrayColumn

Definition at line 252 of file MDirection.h.

typedef MeasConvert<MDirection> casacore::MDirection::Convert

Measure Convert (i.e.

MDirection::Convert)

Definition at line 249 of file MDirection.h.

typedef MCDirection casacore::MDirection::MCType

Measure conversion routines for this class (i.e.

MDirection::MCType)

Definition at line 245 of file MDirection.h.

typedef MVDirection casacore::MDirection::MVType

Measure value container for this class (i.e.

MDirection::MVType)

Definition at line 243 of file MDirection.h.

typedef MeasRef<MDirection> casacore::MDirection::Ref

Measure reference (i.e.

MDirection::Ref)

Definition at line 247 of file MDirection.h.

typedef ScalarMeasColumn<MDirection> casacore::MDirection::ScalarColumn

Measure table Columns (e.g., MDirection::ScalarColumn)

Definition at line 251 of file MDirection.h.

Member Enumeration Documentation

enum casacore::MDirection::GlobalTypes

Global types.

Enumerator
GRADEC
GHADEC
GAZEL
GLONGLAT
N_GTypes

Definition at line 234 of file MDirection.h.

enum casacore::MDirection::Types

Types of known MDirections
Warning: The order defines the order in the translation matrix FromTo in the getConvert routine; Do not change the order without changing the array; Additions should be made before N_types, and an additional row and column should be coded in FromTo, and in showType();

Enumerator
J2000
JMEAN
JTRUE
APP
B1950
B1950_VLA
BMEAN
BTRUE
GALACTIC
HADEC
AZEL
AZELSW
AZELGEO
AZELSWGEO
JNAT
ECLIPTIC
MECLIPTIC
TECLIPTIC
SUPERGAL
ITRF
TOPO
ICRS
N_Types
MERCURY	Planets. First one should be Mercury
VENUS
MARS
JUPITER
SATURN
URANUS
NEPTUNE
PLUTO
SUN
MOON
COMET	Comet or other table-described solar system body.
N_Planets
EXTRA	All extra bits.
DEFAULT	Defaults.
AZELNE	Synonyms.
AZELNEGEO

Definition at line 188 of file MDirection.h.

Constructor & Destructor Documentation

casacore::MDirection::MDirection ( )

Tip: In the following constructors and other functions, all MeasRef can be replaced with simple Measure::TYPE where no offsets or frames are needed in the reference;
Default constructor; generates the J2000 pole direction

casacore::MDirection::MDirection ( const MVDirection & dt )

Create from data and reference.

casacore::MDirection::MDirection	(	const MVDirection &	dt,
		const MDirection::Ref &	rf
	)

casacore::MDirection::MDirection	(	const MVDirection &	dt,
		MDirection::Types	rf
	)

casacore::MDirection::MDirection	(	const Quantity &	dt,
		const Quantity &	dt1
	)

casacore::MDirection::MDirection	(	const Quantity &	dt,
		const Quantity &	dt1,
		const MDirection::Ref &	rf
	)

casacore::MDirection::MDirection	(	const Quantity &	dt,
		const Quantity &	dt1,
		MDirection::Types	rf
	)

casacore::MDirection::MDirection ( const Quantum< Vector< Double > > & dt )

casacore::MDirection::MDirection	(	const Quantum< Vector< Double > > &	dt,
		const MDirection::Ref &	rf
	)

casacore::MDirection::MDirection	(	const Quantum< Vector< Double > > &	dt,
		MDirection::Types	rf
	)

casacore::MDirection::MDirection ( const Measure * dt )

casacore::MDirection::MDirection ( const MeasValue * dt )

casacore::MDirection::MDirection ( const MDirection::Ref & rf )

casacore::MDirection::MDirection ( MDirection::Types rf )

virtual casacore::MDirection::~MDirection ( )

virtual

Member Function Documentation

static const String* casacore::MDirection::allMyTypes	(	Int &	nall,
		Int &	nextra,
		const uInt *&	typ
	)

static

virtual const String* casacore::MDirection::allTypes	(	Int &	nall,
		Int &	nextra,
		const uInt *&	typ
	)		const

virtual

Get a list of all known reference codes.

nall returns the number in list, nextra the number of specials (like planets) that should be at end of list). typ returns the list of corresponding types.

Reimplemented from casacore::Measure.

static void casacore::MDirection::assure ( const Measure & in )

static

Assert you are a direction.

static MDirection::Types casacore::MDirection::castType ( uInt tp )

static

Translate reference code tp.

The uInt version has a check for valid codes (i.e. it is a safe cast).

Thrown Exceptions

AipsError in the uInt interface if illegal code given

static void casacore::MDirection::checkMyTypes ( )

static

virtual void casacore::MDirection::checkTypes ( ) const

virtual

Check if all internal tables of types (both enum and String) are complete and correct.

This function is called automatically if and when necessary.

Thrown Exceptions

AipsError if a (programming) error in the types.

Implements casacore::Measure.

virtual Measure* casacore::MDirection::clone ( ) const

virtual

Make a copy.

Implements casacore::Measure.

Quantum<Vector<Double> > casacore::MDirection::getAngle ( ) const

Get Measure data.

Quantum<Vector<Double> > casacore::MDirection::getAngle ( const Unit & inunit ) const

virtual const String& casacore::MDirection::getDefaultType ( ) const

virtual

Get the default reference type.

Implements casacore::Measure.

virtual String casacore::MDirection::getRefString ( ) const

virtual

Get the reference type (for records, including codes like R_)

Implements casacore::Measure.

static Bool casacore::MDirection::getType	(	MDirection::Types &	tp,
		const String &	in
	)

static

Translate string to reference code.

Bool casacore::MDirection::giveMe	(	MDirection::Ref &	mr,
		const String &	in
	)

static MDirection::GlobalTypes casacore::MDirection::globalType ( uInt tp )

static

Tell me the global type (like GRADEC) for tp (tp like MDirection::J2000)

virtual Bool casacore::MDirection::isModel ( ) const

virtual

Tell me if you are a pure model (e.g.

a planet)

Reimplemented from casacore::Measure.

static MDirection casacore::MDirection::makeMDirection ( const String & sourceName )

static

Make an MDirection object given the case-insensitive name of a moving source (ZENITH, SUN, etc.), or of a known standard source (CygA, etc.).

virtual Bool casacore::MDirection::setOffset ( const Measure & in )

virtual

Set the offset in the reference (False if non-matching Measure)

Implements casacore::Measure.

virtual Bool casacore::MDirection::setRefString ( const String & in )

virtual

Set the reference type to the specified String.

False if illegal string, reference set to DEFAULT.

Implements casacore::Measure.

void casacore::MDirection::shift	(	const Quantum< Double > &	lng,
		const Quantum< Double > &	lat,
		Bool	trueAngle = `False`
	)

Shift the direction in longitude (radians if Double) and/or latitude.

If the trueAngle switch is True, the longitude shift will be in angular units perpendicular to the direction to pole, along a great circle. See MVDirection for more details.

void casacore::MDirection::shift	(	Double	lng,
		Double	lat,
		Bool	trueAngle = `False`
	)

void casacore::MDirection::shift	(	const MVDirection &	shft,
		Bool	trueAngle = `False`
	)

void casacore::MDirection::shiftAngle	(	const Quantum< Double > &	off,
		const Quantum< Double > &	pa
	)

Shift over an angle off in the direction pa.

pa is measured from North, in the direction of increasing longitude. See MVDirection for implementation.

void casacore::MDirection::shiftAngle	(	Double	off,
		Double	pa
	)

void casacore::MDirection::shiftLatitude	(	const Quantum< Double > &	lat,
		Bool	trueAngle = `False`
	)

void casacore::MDirection::shiftLatitude	(	Double	lat,
		Bool	trueAngle = `False`
	)

void casacore::MDirection::shiftLongitude	(	const Quantity &	lng,
		Bool	trueAngle = `False`
	)

void casacore::MDirection::shiftLongitude	(	Double	lng,
		Bool	trueAngle = `False`
	)

static const String& casacore::MDirection::showMe ( )

static

static const String& casacore::MDirection::showType ( MDirection::Types tp )

static

static const String& casacore::MDirection::showType ( uInt tp )

static

virtual const String& casacore::MDirection::tellMe ( ) const

virtual

Tell me your type ('Direction')

Implements casacore::Measure.

String casacore::MDirection::toString ( ) const

Convert to a String in astronomer-friendly format based on reference frame.

Friends And Related Function Documentation

friend class MeasConvert< MDirection >

friend

Conversion of data.

Definition at line 179 of file MDirection.h.

The documentation for this class was generated from the following file:

measures/Measures/MDirection.h

Public Types

Public Member Functions

Static Public Member Functions

Friends

Additional Inherited Members

Detailed Description

Intended use:

Review Status

Prerequisite

Etymology

Synopsis

Example

Motivation

To Do

Member Typedef Documentation

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation

Thrown Exceptions

Thrown Exceptions

Friends And Related Function Documentation