#include <AWProjectWBFT.h>

Inheritance diagram for casa::AWProjectWBFT:

Public Member Functions
	AWProjectWBFT (Int nFacets, Long cachesize, CountedPtr< CFCache > &cfcache, CountedPtr< ConvolutionFunction > &cf, CountedPtr< VisibilityResamplerBase > &visResampler, Bool applyPointingOffset=True, Bool doPBCorr=True, Int tilesize=16, Float paSteps=5.0, Float pbLimit=5e-4, Bool usezero=False, Bool conjBeams_p=True, Bool doublePrecGrid=False)
	Constructor: cachesize is the size of the cache in words (e.g.
	AWProjectWBFT (const RecordInterface &stateRec)
	Construct from a Record containing the AWProjectWBFT state.
	AWProjectWBFT (const AWProjectWBFT &other)
	Copy constructor.
AWProjectWBFT &	operator= (const AWProjectWBFT &other)
	Assignment operator.
	~AWProjectWBFT ()
virtual String	name () const
	Return the name of the machine.
Int	findPointingOffsets (const VisBuffer &vb, Array< Float > &l_off, Array< Float > &m_off, Bool Evaluate)
	Bool changed(const VisBuffer& vb) {return vpSJ->changed(vb,1);}; Bool changed(const VisBuffer& vb) {return False;}.
void	normalizeAvgPB ()

void	normalizeAvgPB (ImageInterface< Complex > &, ImageInterface< Float > &)
virtual void	makeSensitivityImage (const VisBuffer &vb, const ImageInterface< Complex > &imageTemplate, ImageInterface< Float > &sensitivityImage)
	This method is called from AWProjectFT to compute the sensitivity image by accumulating in the image domain (i.e.
virtual void	makeSensitivityImage (Lattice< Complex > &wtImage, ImageInterface< Float > &sensitivityImage, const Matrix< Float > &sumWt=Matrix< Float >(), const Bool &doFFTNorm=True)
	In AWProjectWBFT and its derivatives, sensitivity image is computed by accumulating weight functions (images) during the first gridding cycle.
virtual void	makeSensitivitySqImage (Lattice< Complex > &wtImage, ImageInterface< Complex > &sensitivitySqImage, const Matrix< Float > &sumWt=Matrix< Float >(), const Bool &doFFTNorm=True)
virtual ImageInterface< Complex > &	getImage (Matrix< Float > &, Bool normalize=True)
	Method used to make normalized image from gridded visibilites.
virtual Float	pbFunc (const Float &, const Float &)
	Method used to convert the pixel value of the PB image, passed as pbPixValue, to a value used for PB-normalization.
virtual void	finalizeToSky ()
	{Float tt=(pbPixValue);return (abs(tt) >= pbLimit)?tt:1.0;};
virtual void	initializeToSky (ImageInterface< Complex > &image, Matrix< Float > &weight, const VisBuffer &vb)
	Initialize transform to Sky plane: initializes the image.
void	setObservatoryLocation (const MPosition &mLocation)
	Initialize transform to Visibility plane using the image as a template.
virtual Bool	verifyShapes (IPosition shape0, IPosition shape1)
virtual Bool	computeAvgPB (const Double &, const Double &)
	Returns True if accumulation during gridding to compute the average PB must be done.
Protected Member Functions
void	ftWeightImage (Lattice< Complex > &wtImage, const Matrix< Float > &sumWt, const Bool &doFFTNorm)
	virtual void setMiscInfo(const Int qualifier) {sensitivityPatternQualifier_p=qualifier;} {qualifier_p = qualifier;taylorQualifier_p = "_MFS_"+String::toString(qualifier_p)+"_";};
virtual void	resampleDataToGrid (Array< Complex > &griddedData, VBStore &vbs, const VisBuffer &vb, Bool &dopsf)
virtual void	resampleDataToGrid (Array< DComplex > &griddedData, VBStore &vbs, const VisBuffer &vb, Bool &dopsf)
void	resampleCFToGrid (Array< Complex > &wtsGrid, VBStore &vbs, const VisBuffer &vb)
	virtual void resampleGridToData(VBStore& vbs, const VisBuffer& vb);
Protected Attributes
Bool	avgPBReady_p
Bool	resetPBs_p
Bool	wtImageFTDone_p
Private Attributes
String	tt_pp
Vector< Int >	fieldIds_p
TempImage< Complex >	griddedWeights
TempImage< Complex >	griddedConjWeights
CFStore	rotatedCFWts_p
Float	pbNorm
CountedPtr < VisibilityResamplerBase >	visResamplerWt_p

Detailed Description

Definition at line 41 of file AWProjectWBFT.h.

Constructor & Destructor Documentation

casa::AWProjectWBFT::AWProjectWBFT	(	Int	nFacets,
		Long	cachesize,
		CountedPtr< CFCache > &	cfcache,
		CountedPtr< ConvolutionFunction > &	cf,
		CountedPtr< VisibilityResamplerBase > &	visResampler,
		Bool	applyPointingOffset = `True`,
		Bool	doPBCorr = `True`,
		Int	tilesize = `16`,
		Float	paSteps = `5.0`,
		Float	pbLimit = `5e-4`,
		Bool	usezero = `False`,
		Bool	conjBeams_p = `True`,
		Bool	doublePrecGrid = `False`
	)

Constructor: cachesize is the size of the cache in words (e.g.

a few million is a good number), tilesize is the size of the tile used in gridding (cannot be less than 12, 16 works in most cases).

casa::AWProjectWBFT::AWProjectWBFT ( const RecordInterface & stateRec )

Construct from a Record containing the AWProjectWBFT state.

casa::AWProjectWBFT::AWProjectWBFT ( const AWProjectWBFT & other ) [inline]

Copy constructor.

Definition at line 69 of file AWProjectWBFT.h.

References operator=().

casa::AWProjectWBFT::~AWProjectWBFT ( ) [inline]

Definition at line 74 of file AWProjectWBFT.h.

Member Function Documentation

virtual Bool casa::AWProjectWBFT::computeAvgPB	(	const Double &	,
		const Double &
	)		`[inline, virtual]`

Returns True if accumulation during gridding to compute the average PB must be done.

Reimplemented in casa::MultiTermAWProjectWBFT.

Definition at line 159 of file AWProjectWBFT.h.

References avgPBReady_p, and casa::False.

virtual void casa::AWProjectWBFT::finalizeToSky ( ) [virtual]

{Float tt=(pbPixValue);return (abs(tt) >= pbLimit)?tt:1.0;};

{Float tt=sqrt(pbPixValue);return (abs(tt) >= pbLimit)?tt:1.0;};

Reimplemented from casa::AWProjectFT.

Int casa::AWProjectWBFT::findPointingOffsets	(	const VisBuffer &	,
		Array< Float > &	,
		Array< Float > &	,
		Bool	Evaluate
	)		`[virtual]`

Bool changed(const VisBuffer& vb) {return vpSJ->changed(vb,1);}; Bool changed(const VisBuffer& vb) {return False;}.

Reimplemented from casa::AWProjectFT.

void casa::AWProjectWBFT::ftWeightImage	(	Lattice< Complex > &	wtImage,
		const Matrix< Float > &	sumWt,
		const Bool &	doFFTNorm
	)		`[protected]`

virtual void setMiscInfo(const Int qualifier) {sensitivityPatternQualifier_p=qualifier;} {qualifier_p = qualifier;taylorQualifier_p = "_MFS_"+String::toString(qualifier_p)+"_";};

virtual void ComputeResiduals(VisBuffer&vb, Bool useCorrected) {};

virtual ImageInterface<Complex>& casa::AWProjectWBFT::getImage	(	Matrix< Float > &	,
		Bool	normalize = `True`
	)		`[virtual]`

Method used to make normalized image from gridded visibilites.

This calls makeSensitivityImage() to make the sensitivity image and AWProjectFT::getImage() to make the image from gridded visibilites. AWProjectFT::getImage() internally calls normalizeImage() which uses the sensitivty image computed by makeSensitivtyImage().

Reimplemented from casa::AWProjectFT.

Reimplemented in casa::MultiTermAWProjectWBFT.

virtual void casa::AWProjectWBFT::initializeToSky	(	ImageInterface< Complex > &	image,
		Matrix< Float > &	weight,
		const VisBuffer &	vb
	)		`[virtual]`

Initialize transform to Sky plane: initializes the image.

Reimplemented from casa::AWProjectFT.

virtual void casa::AWProjectWBFT::makeSensitivityImage	(	const VisBuffer &	vb,
		const ImageInterface< Complex > &	imageTemplate,
		ImageInterface< Float > &	sensitivityImage
	)		`[virtual]`

This method is called from AWProjectFT to compute the sensitivity image by accumulating in the image domain (i.e.

directly accumulate the Primay Beam functions). This is called from findConvFunction() so that sensitivity pattern is also pre-computed along with the convolution functions. This in-turn calls the ATerm::makeAverageResponse().

For AWProjectWBFT class of FTMachines, this just issues a log message indicating that this is only setting up things for accumulation of weight images in the first gridding cycle. The actual sensitivity patterns are computed by overloaded function below.

Reimplemented from casa::AWProjectFT.

virtual void casa::AWProjectWBFT::makeSensitivityImage	(	Lattice< Complex > &	wtImage,
		ImageInterface< Float > &	sensitivityImage,
		const Matrix< Float > &	sumWt = `Matrix< Float >()`,
		const Bool &	doFFTNorm = `True`
	)		`[virtual]`

In AWProjectWBFT and its derivatives, sensitivity image is computed by accumulating weight functions (images) during the first gridding cycle.

AWProjectFT::makeSensitivityImage() is overloaded in AWProjectWBFT and only issues a log message.

The following method is used to Fourier transform normalize the accumulated weight images. doFFTNorm when True, the FFT normalization (by pixel volume) is also done.

Reimplemented from casa::AWProjectFT.

Reimplemented in casa::MultiTermAWProjectWBFT.

virtual void casa::AWProjectWBFT::makeSensitivitySqImage	(	Lattice< Complex > &	wtImage,
		ImageInterface< Complex > &	sensitivitySqImage,
		const Matrix< Float > &	sumWt = `Matrix< Float >()`,
		const Bool &	doFFTNorm = `True`
	)		`[virtual]`

virtual String casa::AWProjectWBFT::name ( ) const [inline, virtual]

Return the name of the machine.

Reimplemented from casa::AWProjectFT.

Reimplemented in casa::MultiTermAWProjectWBFT.

Definition at line 76 of file AWProjectWBFT.h.

void casa::AWProjectWBFT::normalizeAvgPB ( ) [virtual]

Reimplemented from casa::AWProjectFT.

void casa::AWProjectWBFT::normalizeAvgPB	(	ImageInterface< Complex > &	,
		ImageInterface< Float > &
	)		`[inline, virtual]`

Reimplemented from casa::AWProjectFT.

Reimplemented in casa::MultiTermAWProjectWBFT.

Definition at line 82 of file AWProjectWBFT.h.

AWProjectWBFT& casa::AWProjectWBFT::operator= ( const AWProjectWBFT & other )

Assignment operator.

Referenced by AWProjectWBFT().

virtual Float casa::AWProjectWBFT::pbFunc	(	const Float &	,
		const Float &
	)		`[inline, virtual]`

Method used to convert the pixel value of the PB image, passed as pbPixValue, to a value used for PB-normalization.

Typically, this will depend on the units of the "PB image" constructed by the makeSensitivtyImage() methods. pbLimit is the fractional pb-gain below which imaging is not required (this value is typically the user-defined parameter in the private member variable pbLimit_p).

Reimplemented from casa::AWProjectFT.

Definition at line 139 of file AWProjectWBFT.h.

void casa::AWProjectWBFT::resampleCFToGrid	(	Array< Complex > &	wtsGrid,
		VBStore &	vbs,
		const VisBuffer &	vb
	)		`[protected]`

virtual void resampleGridToData(VBStore& vbs, const VisBuffer& vb);

virtual void casa::AWProjectWBFT::resampleDataToGrid	(	Array< Complex > &	griddedData,
		VBStore &	vbs,
		const VisBuffer &	vb,
		Bool &	dopsf
	)		`[protected, virtual]`

Reimplemented from casa::AWProjectFT.

virtual void casa::AWProjectWBFT::resampleDataToGrid	(	Array< DComplex > &	griddedData,
		VBStore &	vbs,
		const VisBuffer &	vb,
		Bool &	dopsf
	)		`[protected, virtual]`