MSDerivedValues calculates values derived from a MS. More...

#include <MSDerivedValues.h>

Public Member Functions
	MSDerivedValues ()
	thread-hostile shared pointers (Jim Jacobs 111104) More...

	~MSDerivedValues ()

	MSDerivedValues (const MSDerivedValues &other)
	Copy constructor, this will initialize with other's MS. More...

MSDerivedValues &	operator= (const MSDerivedValues &other)
	Assignment, this will initialize with other's MS. More...

Int	setAntennas (const ROMSAntennaColumns &ac)
	Set antenna position from an antenna table Returns the number of antennas. More...

MSDerivedValues &	setAntennaPositions (const Vector< MPosition > &antPosition)
	Set antenna positions, index in vector is antenna number for calls below. More...

const Vector< MPosition > &	getAntennaPositions () const

MSDerivedValues &	setObservatoryPosition (const MPosition &obsPosition)
	Set the observatory position. More...

MSDerivedValues &	setAntennaMount (const Vector< String > &mount)
	Set antenna mounts, should have same number of entries as antPosition in setAntennaPosition. More...

MSDerivedValues &	setEpoch (const MEpoch &time)
	Set epoch. More...

MSDerivedValues &	setFieldCenter (const MDirection &fieldCenter)
	Set field center. More...

MSDerivedValues &	setFieldCenter (uInt fieldid=0)
	If you have used setMeasurementSet then this version of setFieldCenter using field id makes sense. More...

MSDerivedValues &	setAntenna (Int antenna)
	Set antenna index, sets the position reference for the conversions. More...

MSDerivedValues &	setVelocityFrame (MRadialVelocity::Types vType)
	Set the velocity frame type (e.g., MRadialVelocity::LSRK) More...

MSDerivedValues &	setVelocityReference (MDoppler::Types dopType)
	Set the velocity frame type (e.g., MRDoppler::RADIO) More...

MRadialVelocity::Types	getRadialVelocityType () const

MSDerivedValues &	setFrequencyReference (MFrequency::Types frqType)
	Set the frequency frame (e.g., MFrequency::LSRK) More...

Double	hourAngle ()
	get hour angle More...

Double	parAngle ()
	get parallactic angle More...

const MDirection &	azel ()
	get azimuth & elevation More...

const MEpoch &	last ()
	get LAST for given time, antenna More...

const MRadialVelocity &	obsVel ()
	get observatory radial velocity for given epoch, position and direction More...

MSDerivedValues &	setMeasurementSet (const MeasurementSet &ms)
	Set an ms does not need to explicity setAntennas and is necessary if setRestFreqency(fieldid, spwid) is used. More...

Bool	setRestFrequency (const Int fieldid, const Int spwid, const Int linenum=0)
	Set restFrequencies...make it look for it for the fieldid, spwid and line number defined in the SOURCE table return False if it fails to find the restFrquency. More...

MSDerivedValues &	setRestFrequency (const Quantity &restFreq)

Quantity	toFrequency (const Quantity &vel, const Quantity &restFreq)
	get frequency from velocity More...

Quantity	toFrequency (const Quantity &vel)

Quantity	toVelocity (const Quantity &freq, const Quantity &restFreq)
	get velocity from frequency More...

Quantity	toVelocity (const Quantity &freq)

Private Member Functions
void	init ()
	initialize data More...

Friends
class	VisBufferAsync

Detailed Description

MSDerivedValues calculates values derived from a MS.

Intended use:

Public interface

Review Status

Date Reviewed:: yyyy/mm/dd

Prerequisite

MeasurementSet
SomeOtherClass
some concept

Etymology

MSDerivedValues calculates values derived from those in a MS

Synopsis

MSDerivedValues is a class that computes values derived from those present in a MeasurementSet. E.g., calculate feed position angles on the sky from time, antenna positions and feed characteristics.

Example

// calculate the parallactic angle and the observatory velocity for the
// first time and first source in the MS.
// set up 
MSDerivedValues msd;
MS myMS("myMS");
ROMSColumns msc(myMS);
msd.setAntennas(msc.antenna());
MEpoch ep=MS::epochMeasure(msc.time());
ep.set(MVEpoch(Quantity(msc.time()(0),"s")));
msd.setEpoch(ep);
MDirection dir=MS::directionMeasure(msc.field().phaseDir());
dir.set(MVDirection(Vector<Double>(msc.field().phaseDir()(0))));
msd.setFieldCenter(dir);
msd.setVelocityFrame(MRadialVelocity::LSRK);
// now we are ready for the calculations:
Double parAngle = msd.parangle();
MRadialVelocity observatoryVel = msd.obsVel();

Motivation

Values derived from those in a MS are needed in various places, e.g., for plotting purposes. This class combines the commonly needed calculations in one place.

Thrown Exceptions

To Do

the interface should be less cumbersome
probably needs speeding up

Definition at line 110 of file MSDerivedValues.h.

Constructor & Destructor Documentation

casacore::MSDerivedValues::MSDerivedValues ( )

thread-hostile shared pointers (Jim Jacobs 111104)

casacore::MSDerivedValues::~MSDerivedValues ( )

casacore::MSDerivedValues::MSDerivedValues ( const MSDerivedValues & other )

Copy constructor, this will initialize with other's MS.

Member Function Documentation

const MDirection& casacore::MSDerivedValues::azel ( )

get azimuth & elevation

const Vector<MPosition>& casacore::MSDerivedValues::getAntennaPositions ( ) const

MRadialVelocity::Types casacore::MSDerivedValues::getRadialVelocityType ( ) const

Double casacore::MSDerivedValues::hourAngle ( )

get hour angle

void casacore::MSDerivedValues::init ( )

private

initialize data

const MEpoch& casacore::MSDerivedValues::last ( )

get LAST for given time, antenna

const MRadialVelocity& casacore::MSDerivedValues::obsVel ( )

get observatory radial velocity for given epoch, position and direction

MSDerivedValues& casacore::MSDerivedValues::operator= ( const MSDerivedValues & other )

Assignment, this will initialize with other's MS.

Double casacore::MSDerivedValues::parAngle ( )

get parallactic angle

MSDerivedValues& casacore::MSDerivedValues::setAntenna ( Int antenna )

Set antenna index, sets the position reference for the conversions.

Use -1 to set the reference frame to the observatory position.

MSDerivedValues& casacore::MSDerivedValues::setAntennaMount ( const Vector< String > & mount )

Set antenna mounts, should have same number of entries as antPosition in setAntennaPosition.

MSDerivedValues& casacore::MSDerivedValues::setAntennaPositions ( const Vector< MPosition > & antPosition )

Set antenna positions, index in vector is antenna number for calls below.

Int casacore::MSDerivedValues::setAntennas ( const ROMSAntennaColumns & ac )

Set antenna position from an antenna table Returns the number of antennas.

Also sets the observatory position to the average of the antenna positions.

MSDerivedValues& casacore::MSDerivedValues::setEpoch ( const MEpoch & time )

Set epoch.

MSDerivedValues& casacore::MSDerivedValues::setFieldCenter ( const MDirection & fieldCenter )

Set field center.

MSDerivedValues& casacore::MSDerivedValues::setFieldCenter ( uInt fieldid = 0 )

If you have used setMeasurementSet then this version of setFieldCenter using field id makes sense.

MSDerivedValues& casacore::MSDerivedValues::setFrequencyReference ( MFrequency::Types frqType )

Set the frequency frame (e.g., MFrequency::LSRK)

MSDerivedValues& casacore::MSDerivedValues::setMeasurementSet ( const MeasurementSet & ms )

Set an ms does not need to explicity setAntennas and is necessary if setRestFreqency(fieldid, spwid) is used.

MSDerivedValues& casacore::MSDerivedValues::setObservatoryPosition ( const MPosition & obsPosition )

Set the observatory position.

Note that setAntennas will reset this.

Bool casacore::MSDerivedValues::setRestFrequency	(	const Int	fieldid,
		const Int	spwid,
		const Int	linenum = `0`
	)

Set restFrequencies...make it look for it for the fieldid, spwid and line number defined in the SOURCE table return False if it fails to find the restFrquency.

MSDerivedValues& casacore::MSDerivedValues::setRestFrequency ( const Quantity & restFreq )

MSDerivedValues& casacore::MSDerivedValues::setVelocityFrame ( MRadialVelocity::Types vType )

Set the velocity frame type (e.g., MRadialVelocity::LSRK)

MSDerivedValues& casacore::MSDerivedValues::setVelocityReference ( MDoppler::Types dopType )

Set the velocity frame type (e.g., MRDoppler::RADIO)

Quantity casacore::MSDerivedValues::toFrequency	(	const Quantity &	vel,
		const Quantity &	restFreq
	)

get frequency from velocity

Quantity casacore::MSDerivedValues::toFrequency ( const Quantity & vel )

Quantity casacore::MSDerivedValues::toVelocity	(	const Quantity &	freq,
		const Quantity &	restFreq
	)

get velocity from frequency

Quantity casacore::MSDerivedValues::toVelocity ( const Quantity & freq )

Friends And Related Function Documentation

friend class VisBufferAsync

friend

Definition at line 112 of file MSDerivedValues.h.

Member Data Documentation

Int casacore::MSDerivedValues::antenna_p

private

Definition at line 211 of file MSDerivedValues.h.

MDirection::Convert casacore::MSDerivedValues::cHADecToAzEl_p

private

Definition at line 215 of file MSDerivedValues.h.

MDirection::Convert casacore::MSDerivedValues::cRADecToAzEl_p

private

Definition at line 214 of file MSDerivedValues.h.

MDirection::Convert casacore::MSDerivedValues::cRADecToHADec_p

private

Definition at line 216 of file MSDerivedValues.h.

MRadialVelocity::Convert casacore::MSDerivedValues::cTOPOToLSR_p

private

Definition at line 222 of file MSDerivedValues.h.

MEpoch::Convert casacore::MSDerivedValues::cUTCToLAST_p

private

Definition at line 212 of file MSDerivedValues.h.

MeasFrame casacore::MSDerivedValues::fAntFrame_p

private

Definition at line 217 of file MSDerivedValues.h.

MFrequency::Ref casacore::MSDerivedValues::frqref_p

private

Definition at line 224 of file MSDerivedValues.h.

Bool casacore::MSDerivedValues::hasMS_p

private

Definition at line 225 of file MSDerivedValues.h.

Vector<MPosition> casacore::MSDerivedValues::mAntPos_p

private

Definition at line 213 of file MSDerivedValues.h.

MDirection casacore::MSDerivedValues::mFieldCenter_p

private

Definition at line 220 of file MSDerivedValues.h.

MDirection casacore::MSDerivedValues::mHADecPoleInAzEl_p

private

Definition at line 219 of file MSDerivedValues.h.

MPosition casacore::MSDerivedValues::mObsPos_p

private

Definition at line 221 of file MSDerivedValues.h.

Vector<Int> casacore::MSDerivedValues::mount_p

private

Definition at line 227 of file MSDerivedValues.h.

MDirection casacore::MSDerivedValues::mRADecInAzEl_p

private

Definition at line 218 of file MSDerivedValues.h.

MeasurementSet casacore::MSDerivedValues::ms_p

private

Definition at line 228 of file MSDerivedValues.h.

MRadialVelocity::Types casacore::MSDerivedValues::radialVelocityType_p

private

Definition at line 229 of file MSDerivedValues.h.

Quantity casacore::MSDerivedValues::restFreq_p

private

Definition at line 226 of file MSDerivedValues.h.

MDoppler::Ref casacore::MSDerivedValues::velref_p

private

Definition at line 223 of file MSDerivedValues.h.

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

casa/casacore/ms/MSOper/MSDerivedValues.h

Private Attributes
Int	antenna_p

MEpoch::Convert	cUTCToLAST_p

Vector< MPosition >	mAntPos_p

MDirection::Convert	cRADecToAzEl_p

MDirection::Convert	cHADecToAzEl_p

MDirection::Convert	cRADecToHADec_p

MeasFrame	fAntFrame_p

MDirection	mRADecInAzEl_p

MDirection	mHADecPoleInAzEl_p

MDirection	mFieldCenter_p

MPosition	mObsPos_p

MRadialVelocity::Convert	cTOPOToLSR_p

MDoppler::Ref	velref_p

MFrequency::Ref	frqref_p

Bool	hasMS_p

Quantity	restFreq_p

Vector< Int >	mount_p

MeasurementSet	ms_p

MRadialVelocity::Types	radialVelocityType_p

Public Member Functions

Private Member Functions

Private Attributes

Friends

Detailed Description

Intended use:

Review Status

Prerequisite

Etymology

Synopsis

Example

Motivation

Thrown Exceptions

To Do

Constructor & Destructor Documentation

Member Function Documentation

Friends And Related Function Documentation

Member Data Documentation