Engine for TaQL UDF EarthMagnetic conversions. More...

#include <EarthMagneticEngine.h>

Inheritance diagram for casacore::EarthMagneticEngine:

Public Member Functions
	EarthMagneticEngine ()

virtual	~EarthMagneticEngine ()

Int	valueType () const
	Get the value type. More...

Array< Double >	getArrayDouble (const TableExprId &id)
	Get the values. More...

void	handleEarthMagnetic (std::vector< TENShPtr > &args, uInt &argnr)
	Handle the argument(s) giving the input earthMagnetics or direction and reference type. More...

void	handleHeight (TENShPtr &operand)
	Handle the heights argument. More...

void	setEpochEngine (EpochEngine &engine)
	Set the MeasConvert object. More...

void	setPositionEngine (PositionEngine &engine)
	Set the possible position engine. More...

void	setDirectionEngine (DirectionEngine &engine)
	Set the possible direction engine. More...

void	set (MEarthMagnetic::Types toRefType, Int toValueType, Bool asLOS, Bool asLong, Bool useModel)
	Set the types of the result. More...

Public Member Functions inherited from casacore::MeasEngine< MEarthMagnetic >
	MeasEngine ()

virtual	~MeasEngine ()

MEarthMagnetic::Types	refType () const
	Get the reference type. More...

Bool	handleMeasType (const TENShPtr &operand, Bool doThrow)
	Handle a doppler reference type. More...

Record	makeAttributes (typename MEarthMagnetic::Types refType, Int valueType=1) const
	Make the expression result attributes. More...

Public Member Functions inherited from casacore::BaseEngine
	BaseEngine ()

virtual	~BaseEngine ()

void	adaptForConstant (const IPosition &shapeConstant, uInt nvalues=0)
	Adapt the output shape and dimensionality for possible constant values. More...

void	extendBase (const BaseEngine &, Bool removeFirstAxis=False)
	Extend the shape (if not empty) with the engine's shape. More...

const IPosition &	shape () const
	Get the output shape. More...

Int	ndim () const
	Get the output dimensionality. More...

const Unit &	unit () const
	Get the unit of the function's result. More...

const Unit &	inUnit () const
	Get the unit of the expression. More...

Bool	isConstant () const
	Tell if the expression is constant. More...

Private Member Functions
virtual String	stripMeasType (const String &type)
	Strip a possible suffix from the reference type. More...

virtual void	deriveAttr (const Unit &unit, Int nval)
	Let a derived class derive its attributes. More...

virtual void	setValueType (Int valueType)
	Let a derived class set its value type. More...

MEarthMagnetic	makeEarthMagnetic (const Quantity &qh, const Quantity &q1, const Quantity &q2) const
	Make an MEarthMagnetic from xyz or length,angles. More...

void	handleScalars (const TENShPtr &e1, const TENShPtr &e2, const TENShPtr &e3)

virtual void	handleValues (TableExprNode &operand, const TableExprId &id, Array< MEarthMagnetic > &earthMagnetics)
	Let a derive class handle the values. More...

Array< MEarthMagnetic >	getEarthMagnetics (const TableExprId &id)

Array< Double >	getHeights (const TableExprId &id)

void	copyEM (const MVEarthMagnetic &em, double *&outPtr)

void	copyLLEM (EarthMagneticMachine &emm, double *&outPtr)

Additional Inherited Members
Protected Member Functions inherited from casacore::MeasEngine< MEarthMagnetic >
void	handleMeasArray (const TENShPtr &operand)
	Handle the operand representing an array of Meas values. More...

void	handleConstant (const TENShPtr &operand)
	Handle a constant Meas value. More...

Protected Attributes inherited from casacore::MeasEngine< MEarthMagnetic >
Array< MEarthMagnetic >	itsConstants

MEarthMagnetic::Types	itsRefType

ScalarMeasColumn< MEarthMagnetic >	itsMeasScaCol

ArrayMeasColumn< MEarthMagnetic >	itsMeasArrCol

Protected Attributes inherited from casacore::BaseEngine
Bool	itsIsConst

IPosition	itsShape

Int	itsNDim

Unit	itsInUnit

Unit	itsOutUnit

TableExprNode	itsExprNode

Detailed Description

Engine for TaQL UDF EarthMagnetic conversions.

Intended use:

Public interface

Review Status

Test programs:: tMeas

Prerequisite

EngineBase

Synopsis

EarthMagneticEngine defines Engines (user defined functions) that can be used in TaQL to convert EarthMagnetic values from one frame to another or to calculate them from the IGRF model. In this way such derived values appear to be ordinary TaQL functions.

In TaQL these functions can be called like:

meas.em   (toref, emvalues, epochs, positions)
meas.igrf (toref, heights, directions, epochs, positions)
meas.igrflos  (heights, directions, epochs, positions)
meas.igrflong (heights, directions, epochs, positions)

The first one converts the given EarthMagnetic values to the 'toref' frame for all epoch and positions (their Cartesian product). The second one calculates the IGRF model values in the 'toref' frame for all heights, directions, epochs and positions. The 3rd and 4th return the model value along the line-of-sight cq. as longitude for all heights, directions, epochs and positions. The first two function names can be followed by XYZ, ANGLES or LENGTH to return the values according to the suffix.

toref is a single constant string. If not given, it defaults to ITRF. Note that 'toref' can also be given for function IGRFLOS and IGRFLONG, but is neglected.
emvalues gives the EarthMagnetic values to be converted. They can be given in various forms.
- An array of positions given as xyz or as lon-lat-flux Note that specifying as lon-lat-flux precludes use of units (angle and length units cannot be mixed in a TaQL value), while xyz must have a flux unit (e.g., nT). It means that the unit determines if xyz or lon-lat-flux is given. It can be given as a single list or a multi-dim array. It can be followed by a string defining the source reference type, which defaults to ITRF.
- If a single constant position is used, it can be given as 3 scalar values, optionally followed by the source reference type. The unit defines iff x,y,z or lon-lat-flux is given.
- The name of a column in a table or a subset of it such as EMVAL[0,]. Often this is a TableMeasures column which is recognized as such, also its source reference frame. If such a column is used in a expression, it will not be recognized as a TableMeasures column and its reference frame should be given.
heights is one or more real values giving the heights above the earth at which the model has to be calculated. Default unit is m.
directions defines the directions in which the model has to be calculated. They can be given in all forms as described in class DirectionEngine.
epochs can be given as shown in class EpochEngine.
positions can be given as shown in class PositionEngine.

All functions return data with type double and unit nT. Unit rad is returned for functions with the ANGLES suffix.

The result of a conversion is an array with shape [1|2|3,em,epoch,pos]. The model calculations result has shape [1|2|3,h,dir,epoch,pos] The last 3 or 4 elements are the shapes of these arguments. They are omitted if all of them have length 1.

Example

// Get IGRF model value for today at the WSRT at 200 km height
// in the direction of the SUN.
meas.igrf (200km, 'SUN', date(), 'WSRT')
// Similar, but the flux along the line of sight.
meas.igrflos (200km, 'SUN', date(), 'WSRT')
// Convert an earthmagnetic value from ITRF to J2000 angles.
meas.emang ('J2000', 677, 45441, 29517, date(), 'WSRT')

Motivation

It makes it possible to handle measures in TaQL.

Definition at line 143 of file EarthMagneticEngine.h.

Constructor & Destructor Documentation

casacore::EarthMagneticEngine::EarthMagneticEngine ( )

virtual casacore::EarthMagneticEngine::~EarthMagneticEngine ( )

virtual

Member Function Documentation

void casacore::EarthMagneticEngine::copyEM	(	const MVEarthMagnetic &	em,
		double *&	outPtr
	)

private

void casacore::EarthMagneticEngine::copyLLEM	(	EarthMagneticMachine &	emm,
		double *&	outPtr
	)

private

virtual void casacore::EarthMagneticEngine::deriveAttr	(	const Unit &	unit,
		Int	nval
	)

privatevirtual

Let a derived class derive its attributes.

The default implementation does nothing.

Reimplemented from casacore::BaseEngine.

Array<Double> casacore::EarthMagneticEngine::getArrayDouble ( const TableExprId & id )

Get the values.

Array<MEarthMagnetic> casacore::EarthMagneticEngine::getEarthMagnetics ( const TableExprId & id )

private

Array<Double> casacore::EarthMagneticEngine::getHeights ( const TableExprId & id )

private

void casacore::EarthMagneticEngine::handleEarthMagnetic	(	std::vector< TENShPtr > &	args,
		uInt &	argnr
	)

Handle the argument(s) giving the input earthMagnetics or direction and reference type.

The earthMagnetic can be a column in a table. Note that direction (or height) can only be given for reftype IGRF.

void casacore::EarthMagneticEngine::handleHeight ( TENShPtr & operand )

Handle the heights argument.

void casacore::EarthMagneticEngine::handleScalars	(	const TENShPtr &	e1,
		const TENShPtr &	e2,
		const TENShPtr &	e3
	)

private

virtual void casacore::EarthMagneticEngine::handleValues	(	TableExprNode &	operand,
		const TableExprId &	id,
		Array< MEarthMagnetic > &	positions
	)

privatevirtual

Let a derive class handle the values.

Implements casacore::MeasEngine< MEarthMagnetic >.

MEarthMagnetic casacore::EarthMagneticEngine::makeEarthMagnetic	(	const Quantity &	qh,
		const Quantity &	q1,
		const Quantity &	q2
	)		const

private

Make an MEarthMagnetic from xyz or length,angles.

void casacore::EarthMagneticEngine::set	(	MEarthMagnetic::Types	toRefType,
		Int	toValueType,
		Bool	asLOS,
		Bool	asLong,
		Bool	useModel
	)

Set the types of the result.

void casacore::EarthMagneticEngine::setDirectionEngine ( DirectionEngine & engine )

Set the possible direction engine.

It can be done only once.

void casacore::EarthMagneticEngine::setEpochEngine ( EpochEngine & engine )

Set the MeasConvert object.

Set the possible epoch engine. It can be done only once.

void casacore::EarthMagneticEngine::setPositionEngine ( PositionEngine & engine )

Set the possible position engine.

It can be done only once.

virtual void casacore::EarthMagneticEngine::setValueType ( Int valueType )

privatevirtual

Let a derived class set its value type.

By default is does nothing.

Reimplemented from casacore::BaseEngine.

virtual String casacore::EarthMagneticEngine::stripMeasType ( const String & type )

privatevirtual

Strip a possible suffix from the reference type.

Reimplemented from casacore::BaseEngine.

Int casacore::EarthMagneticEngine::valueType ( ) const

inline

Get the value type.

It also gives the nr of output values per position. 0=default, 1=length (in tesla), 2=angles (in radians)

Definition at line 152 of file EarthMagneticEngine.h.

References itsValueType.

Member Data Documentation

Bool casacore::EarthMagneticEngine::itsAsLong

private

Definition at line 211 of file EarthMagneticEngine.h.

Bool casacore::EarthMagneticEngine::itsAsLOS

private

Definition at line 210 of file EarthMagneticEngine.h.

MEarthMagnetic::Convert casacore::EarthMagneticEngine::itsConverter

private

Definition at line 206 of file EarthMagneticEngine.h.

Bool casacore::EarthMagneticEngine::itsConvertModel

private

Definition at line 213 of file EarthMagneticEngine.h.

DirectionEngine* casacore::EarthMagneticEngine::itsDirectionEngine

private

Definition at line 216 of file EarthMagneticEngine.h.

EpochEngine* casacore::EarthMagneticEngine::itsEpochEngine

private

Definition at line 214 of file EarthMagneticEngine.h.

MeasFrame casacore::EarthMagneticEngine::itsFrame

private

Definition at line 204 of file EarthMagneticEngine.h.

EarthMagneticMachine casacore::EarthMagneticEngine::itsMachine

private

Definition at line 205 of file EarthMagneticEngine.h.

PositionEngine* casacore::EarthMagneticEngine::itsPositionEngine

private

Definition at line 215 of file EarthMagneticEngine.h.

Int casacore::EarthMagneticEngine::itsToValueType

private

Definition at line 209 of file EarthMagneticEngine.h.

Bool casacore::EarthMagneticEngine::itsUseModel

private

Definition at line 212 of file EarthMagneticEngine.h.

Int casacore::EarthMagneticEngine::itsValueType

private

Definition at line 207 of file EarthMagneticEngine.h.

Referenced by valueType().

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

casa/casacore/meas/MeasUDF/EarthMagneticEngine.h

Private Attributes
MeasFrame	itsFrame

EarthMagneticMachine	itsMachine

MEarthMagnetic::Convert	itsConverter

Int	itsValueType

Int	itsToValueType

Bool	itsAsLOS

Bool	itsAsLong

Bool	itsUseModel

Bool	itsConvertModel

EpochEngine *	itsEpochEngine

PositionEngine *	itsPositionEngine

DirectionEngine *	itsDirectionEngine

Public Member Functions

Private Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Intended use:

Review Status

Prerequisite

Synopsis

Example

Motivation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation