casa::VisBufferUtil Class Reference

#include <VisBufferUtil.h>

List of all members.

Public Member Functions
	VisBufferUtil ()
	Empty Constructor.
	VisBufferUtil (const VisBuffer &vb)
	Construct from a VisBuffer (sets a MeasFrame).
	VisBufferUtil (const vi::VisBuffer2 &vb)
	Same as above but with VisBuffer2; It has to be attached to a VisIter2 as the frame is determined that way otherwise use one of the constructors below or the empty constructor above.
	VisBufferUtil (const vi::VisibilityIterator2 &iter)
	Construct with the vi2 to get access to the ms to define frame.
	VisBufferUtil (const MeasFrame &mframe)
void	makePSFVisBuffer (VisBuffer &vb)
	Make PSF VisBuffer.
Bool	interpolateFrequency (Cube< Complex > &data, Cube< Bool > &flags, const VisBuffer &vb, const Vector< Float > &outFreqGrid, const MS::PredefinedColumns whichCol=MS::DATA, const MFrequency::Types freqFrame=MFrequency::LSRK, const InterpolateArray1D< Float, Complex >::InterpolationMethod interp=(InterpolateArray1D< Float, Complex >::nearestNeighbour))
	Regrid the data on a new frequency grid (defined by outFreqGrid) , on the frequency frame (defined by freqFrame).
void	convertFrequency (Vector< Double > &outFreq, const VisBuffer &vb, const MFrequency::Types freqFrame)
	Converts the frequency in this visbuffer to the frame requested.
void	convertFrequency (Vector< Double > &outFreq, const vi::VisBuffer2 &vb, const MFrequency::Types freqFrame)
	This one is just to test VisBuffer2 internal conversions.
void	toVelocity (Vector< Double > &outVel, const VisBuffer &vb, const MFrequency::Types freqFrame, const MVFrequency restFreq, const MDoppler::Types veldef)
	Converts the frequency in this VisBuffer to velocity in the frame/def requested.
void	toVelocity (Vector< Double > &outVel, const vi::VisBuffer2 &vb, const MFrequency::Types freqFrame, const MVFrequency restFreq, const MDoppler::Types veldef, const Int row=0)
	Converts the frequencies on given row of VisBuffer2 to velocity in the frame/def requested.
void	toVelocity (Vector< Double > &outVel, const vi::VisBuffer2 &vb, const vi::VisibilityIterator2 &iter, const MFrequency::Types freqFrame, const MVFrequency restFreq, const MDoppler::Types veldef, const Int row=0)
	same as above but can be a detached Visbuffer ...the iterator is used explicitly to get some info like direction from field table and frame from spectral window table
get the velocity values for the frequencies passed in *void	toVelocity (Vector< Double > &outVel, const MFrequency::Types outfreqFrame, const Vector< Double > &inFreq, const MFrequency::Types inFreqFrame, const MEpoch &ep, const MDirection &dir, const MVFrequency restFreq, const MDoppler::Types veldef)
	for the epoch and direction.
Bool	rotateUVW (const vi::VisBuffer2 &vb, const MDirection &desiredDir, Matrix< Double > &uvw, Vector< Double > &dphase)
	Rotate the uvw in the vb along with giving the phase needed to convert the visibilities to a new phasecenter will return a False if it is a NoOP...don't need then to waste time applying the phasor etc.
MDirection	getPointingDir (const VisBuffer &vb, const Int antid, const Int row)
	get the pointing direction for a given integration and antenna id will cache it for large pointing table specially so that it can be reused pronto
Static Public Member Functions
static void	getFreqRange (Double &freqMin, Double &freqMax, vi::VisibilityIterator2 &vi, MFrequency::Types freqFrame)
	This is a helper function as vi2 does not have a get Freq range for the data selected.
Private Member Functions
void	swapyz (Cube< Bool > &out, const Cube< Bool > &in)
void	swapyz (Cube< Complex > &out, const Cube< Complex > &in)
void	rejectConsecutive (const Vector< Double > &t, Vector< Double > &retval)
Private Attributes
MeasFrame	mframe_
	A MeasFrame for conversions.
Int	oldMSId_p
Vector< std::map< String, Int > >	timeAntIndex_p
Vector< Vector< MDirection > >	cachedPointingDir_p

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Detailed Description

Etymology

Synopsis

Example

Motivation

Definition at line 67 of file VisBufferUtil.h.

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Constructor & Destructor Documentation

casa::VisBufferUtil::VisBufferUtil

(

)

Empty Constructor.

casa::VisBufferUtil::VisBufferUtil

(

const VisBuffer &

vb

)

Construct from a VisBuffer (sets a MeasFrame).

casa::VisBufferUtil::VisBufferUtil

(

const vi::VisBuffer2 &

vb

)

Same as above but with VisBuffer2; It has to be attached to a VisIter2 as the frame is determined that way otherwise use one of the constructors below or the empty constructor above.

casa::VisBufferUtil::VisBufferUtil

(

const vi::VisibilityIterator2 &

iter

)

Construct with the vi2 to get access to the ms to define frame.

casa::VisBufferUtil::VisBufferUtil

(

const MeasFrame &

mframe

)

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Member Function Documentation

void casa::VisBufferUtil::convertFrequency	(	Vector< Double > &	outFreq,
		const vi::VisBuffer2 &	vb,
		const MFrequency::Types	freqFrame
	)

This one is just to test VisBuffer2 internal conversions.

void casa::VisBufferUtil::convertFrequency	(	Vector< Double > &	outFreq,
		const VisBuffer &	vb,
		const MFrequency::Types	freqFrame
	)

Converts the frequency in this visbuffer to the frame requested.

static void casa::VisBufferUtil::getFreqRange	(	Double &	freqMin,
		Double &	freqMax,
		vi::VisibilityIterator2 &	vi,
		MFrequency::Types	freqFrame
	)			[static]

This is a helper function as vi2 does not have a get Freq range for the data selected.

MDirection casa::VisBufferUtil::getPointingDir	(	const VisBuffer &	vb,
		const Int	antid,
		const Int	row
	)

get the pointing direction for a given integration and antenna id will cache it for large pointing table specially so that it can be reused pronto

Bool casa::VisBufferUtil::interpolateFrequency	(	Cube< Complex > &	data,
		Cube< Bool > &	flags,
		const VisBuffer &	vb,
		const Vector< Float > &	outFreqGrid,
		const MS::PredefinedColumns	whichCol = MS::DATA,
		const MFrequency::Types	freqFrame = MFrequency::LSRK,
		const InterpolateArray1D< Float, Complex >::InterpolationMethod	interp = (InterpolateArray1D< Float, Complex >::nearestNeighbour)
	)

Regrid the data on a new frequency grid (defined by outFreqGrid) , on the frequency frame (defined by freqFrame).

It will pass back the interpolated data and flags

void casa::VisBufferUtil::makePSFVisBuffer

(

VisBuffer &

vb

)

Make PSF VisBuffer.

void casa::VisBufferUtil::rejectConsecutive	(	const Vector< Double > &	t,
		Vector< Double > &	retval
	)			[private]

Bool casa::VisBufferUtil::rotateUVW	(	const vi::VisBuffer2 &	vb,
		const MDirection &	desiredDir,
		Matrix< Double > &	uvw,
		Vector< Double > &	dphase
	)

Rotate the uvw in the vb along with giving the phase needed to convert the visibilities to a new phasecenter will return a False if it is a NoOP...don't need then to waste time applying the phasor etc.

void casa::VisBufferUtil::swapyz	(	Cube< Complex > &	out,
		const Cube< Complex > &	in
	)			[private]

void casa::VisBufferUtil::swapyz	(	Cube< Bool > &	out,
		const Cube< Bool > &	in
	)			[private]

get the velocity values for the frequencies passed in* void casa::VisBufferUtil::toVelocity	(	Vector< Double > &	outVel,
		const MFrequency::Types	outfreqFrame,
		const Vector< Double > &	inFreq,
		const MFrequency::Types	inFreqFrame,
		const MEpoch &	ep,
		const MDirection &	dir,
		const MVFrequency	restFreq,
		const MDoppler::Types	veldef
	)

for the epoch and direction.

If rest frequency is -ve then the middle channel is used as the rest value

void casa::VisBufferUtil::toVelocity	(	Vector< Double > &	outVel,
		const vi::VisBuffer2 &	vb,
		const vi::VisibilityIterator2 &	iter,
		const MFrequency::Types	freqFrame,
		const MVFrequency	restFreq,
		const MDoppler::Types	veldef,
		const Int	row = 0
	)

same as above but can be a detached Visbuffer ...the iterator is used explicitly to get some info like direction from field table and frame from spectral window table

void casa::VisBufferUtil::toVelocity	(	Vector< Double > &	outVel,
		const vi::VisBuffer2 &	vb,
		const MFrequency::Types	freqFrame,
		const MVFrequency	restFreq,
		const MDoppler::Types	veldef,
		const Int	row = 0
	)

Converts the frequencies on given row of VisBuffer2 to velocity in the frame/def requested.

void casa::VisBufferUtil::toVelocity	(	Vector< Double > &	outVel,
		const VisBuffer &	vb,
		const MFrequency::Types	freqFrame,
		const MVFrequency	restFreq,
		const MDoppler::Types	veldef
	)

Converts the frequency in this VisBuffer to velocity in the frame/def requested.

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Member Data Documentation

Vector<Vector<MDirection> > casa::VisBufferUtil::cachedPointingDir_p [private]

Definition at line 169 of file VisBufferUtil.h.

MeasFrame casa::VisBufferUtil::mframe_ [private]

A MeasFrame for conversions.

Definition at line 166 of file VisBufferUtil.h.

Int casa::VisBufferUtil::oldMSId_p [private]

Definition at line 167 of file VisBufferUtil.h.

Vector<std::map<String, Int> > casa::VisBufferUtil::timeAntIndex_p [private]

Definition at line 168 of file VisBufferUtil.h.

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

• code/msvis/MSVis/VisBufferUtil.h