casa::VisCalSolver2 Class Reference

VisCalSolver2: Default solver for calibration using visibility data. More...

#include <VisCalSolver2.h>

List of all members.

Public Member Functions
	VisCalSolver2 ()
	Constructor currently generic.
	~VisCalSolver2 ()
	Destructor.
Bool	solve (VisEquation &viseq, SolvableVisCal &svc, SDBList &sdbs)
	Do the solve.
Protected Member Functions
SDBList &	sdbs ()
	Access to fundamental external objects:.
VisEquation &	ve ()
SolvableVisCal &	svc ()
Int &	maxIter ()
	Access to maxIter_.
Double &	chiSq ()
	Access to chi2.
Vector< Double > &	chiSqV ()
Double &	lastChiSq ()
Double &	dChiSq ()
Double &	sumWt ()
Vector< Double > &	sumWtV ()
Int &	nWt ()
Int &	nPar ()
	Access to parameters, & grad,hess,dp.
Vector< Complex > &	par ()
Vector< Bool > &	parOK ()
Vector< Float > &	parErr ()
Vector< DComplex > &	grad ()
Vector< Double > &	hess ()
Vector< Complex > &	dpar ()
Vector< Complex > &	lastPar ()
Double &	lambda ()
void	initSolve ()
	Initialize solving data.
void	residualate2 ()
	Obtain trial residuals w.r.t svc's current pars.
void	differentiate2 ()
	Differentiate w.r.t svc's pars.
void	chiSquare2 ()
	Calculate residuals (incl.
Bool	converged ()
	Check for convergence.
void	accGradHess2 ()
	Internal solving methods.
void	revert ()
void	solveGradHess ()
void	updatePar ()
void	optStepSize2 ()
	Optimize the step parabolically.
void	getErrors ()
	Get and print par errors.
void	printPar (const Int &iter)
Private Member Functions
Int &	prtlev ()
	Diagnostic print level.
Private Attributes
SDBList *	SDBs_
	VisBuffer (from outside).
VisEquation *	ve_
	VisEquation (from outside).
SolvableVisCal *	svc_
	SVC (from outside).
Int	nPar_
	Total Number of parameters.
Int	maxIter_
	Maximum number of solve iterations to attempt.
Double	chiSq_
	Chi2, sum wts.
Vector< Double >	chiSqV_
Double	lastChiSq_
Double	dChiSq_
Double	sumWt_
Vector< Double >	sumWtV_
Int	nWt_
Int	cvrgcount_
Vector< Complex >	par_
	Parameter storage (these are Complex to match the VisCal solvePar).
Vector< Bool >	parOK_
Vector< Float >	parErr_
Vector< Complex >	lastPar_
Vector< Complex >	dpar_
	Parameter update.
Vector< DComplex >	grad_
	Gradient, Hessian (these are Double for precision in accumulation.
Vector< Double >	hess_
Double	lambda_
	LM factor.
Bool	optstep_
	Step optimization toggle.
Int	prtlev_
	Diagnostic print level.

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Detailed Description

VisCalSolver2: Default solver for calibration using visibility data.

Intended use:

Public interface

Prerequisite

• MeasurementComponents module
• VisEquation module

Etymology

VisCal for visibility calibration (meaning solved from visibilities), Solver for solving.

Synopsis

VisCalSolver2 describes an interface for solving for calibration from visibility data in a VisBuffer. It hosts the communication of visibility data with otherwise generic solving mechanims. A Levenberg-Marquardt solver is supplied here by default, but it is intended that this class be the template for interfaces to third-party solving mechanisms.

Example

Motivation

It is desirable to establish the distinct communicative boundary between generic solving mechanims and the particulars of visibility data and calibration component descriptions. This class is intended to serve this purpose, by providing access to visibility data and calibration in terms of quantities necessary for least-squares (and other) style solvers.

VisCalSolver2

Definition at line 93 of file VisCalSolver2.h.

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Constructor & Destructor Documentation

casa::VisCalSolver2::VisCalSolver2

(

)

Constructor currently generic.

casa::VisCalSolver2::~VisCalSolver2

(

)

Destructor.

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Member Function Documentation

void casa::VisCalSolver2::accGradHess2

(

)

[protected]

Internal solving methods.

Double& casa::VisCalSolver2::chiSq

(

)

[inline, protected]

Access to chi2.

Definition at line 116 of file VisCalSolver2.h.

References chiSq_.

void casa::VisCalSolver2::chiSquare2

(

)

[protected]

Calculate residuals (incl.

diff'd) and chi2

Vector<Double>& casa::VisCalSolver2::chiSqV

(

)

[inline, protected]

Definition at line 117 of file VisCalSolver2.h.

References chiSqV_.

Bool casa::VisCalSolver2::converged

(

)

[protected]

Check for convergence.

Double& casa::VisCalSolver2::dChiSq

(

)

[inline, protected]

Definition at line 119 of file VisCalSolver2.h.

References dChiSq_.

void casa::VisCalSolver2::differentiate2

(

)

[protected]

Differentiate w.r.t svc's pars.

Vector<Complex>& casa::VisCalSolver2::dpar

(

)

[inline, protected]

Definition at line 131 of file VisCalSolver2.h.

References dpar_.

void casa::VisCalSolver2::getErrors

(

)

[protected]

Get and print par errors.

Vector<DComplex>& casa::VisCalSolver2::grad

(

)

[inline, protected]

Definition at line 129 of file VisCalSolver2.h.

References grad_.

Vector<Double>& casa::VisCalSolver2::hess

(

)

[inline, protected]

Definition at line 130 of file VisCalSolver2.h.

References hess_.

void casa::VisCalSolver2::initSolve

(

)

[protected]

Initialize solving data.

Double& casa::VisCalSolver2::lambda

(

)

[inline, protected]

Definition at line 134 of file VisCalSolver2.h.

References lambda_.

Double& casa::VisCalSolver2::lastChiSq

(

)

[inline, protected]

Definition at line 118 of file VisCalSolver2.h.

References lastChiSq_.

Vector<Complex>& casa::VisCalSolver2::lastPar

(

)

[inline, protected]

Definition at line 132 of file VisCalSolver2.h.

References lastPar_.

Int& casa::VisCalSolver2::maxIter

(

)

[inline, protected]

Access to maxIter_.

Definition at line 113 of file VisCalSolver2.h.

References maxIter_.

Int& casa::VisCalSolver2::nPar

(

)

[inline, protected]

Access to parameters, & grad,hess,dp.

Definition at line 125 of file VisCalSolver2.h.

References nPar_.

Int& casa::VisCalSolver2::nWt

(

)

[inline, protected]

Definition at line 122 of file VisCalSolver2.h.

References nWt_.

void casa::VisCalSolver2::optStepSize2

(

)

[protected]

Optimize the step parabolically.

Vector<Complex>& casa::VisCalSolver2::par

(

)

[inline, protected]

Definition at line 126 of file VisCalSolver2.h.

References par_.

Vector<Float>& casa::VisCalSolver2::parErr

(

)

[inline, protected]

Definition at line 128 of file VisCalSolver2.h.

References parErr_.

Vector<Bool>& casa::VisCalSolver2::parOK

(

)

[inline, protected]

Definition at line 127 of file VisCalSolver2.h.

References parOK_.

void casa::VisCalSolver2::printPar

(

const Int &

iter

)

[protected]

Int& casa::VisCalSolver2::prtlev

(

)

[inline, private]

Diagnostic print level.

Definition at line 168 of file VisCalSolver2.h.

void casa::VisCalSolver2::residualate2

(

)

[protected]

Obtain trial residuals w.r.t svc's current pars.

void casa::VisCalSolver2::revert

(

)

[protected]

SDBList& casa::VisCalSolver2::sdbs

(

)

[inline, protected]

Access to fundamental external objects:.

Definition at line 108 of file VisCalSolver2.h.

References SDBs_.

Bool casa::VisCalSolver2::solve	(	VisEquation &	viseq,
		SolvableVisCal &	svc,
		SDBList &	sdbs
	)

Do the solve.

void casa::VisCalSolver2::solveGradHess

(

)

[protected]

Double& casa::VisCalSolver2::sumWt

(

)

[inline, protected]

Definition at line 120 of file VisCalSolver2.h.

References sumWt_.

Vector<Double>& casa::VisCalSolver2::sumWtV

(

)

[inline, protected]

Definition at line 121 of file VisCalSolver2.h.

References sumWtV_.

SolvableVisCal& casa::VisCalSolver2::svc

(

)

[inline, protected]

Definition at line 110 of file VisCalSolver2.h.

References svc_.

void casa::VisCalSolver2::updatePar

(

)

[protected]

VisEquation& casa::VisCalSolver2::ve

(

)

[inline, protected]

Definition at line 109 of file VisCalSolver2.h.

References ve_.

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Member Data Documentation

Double casa::VisCalSolver2::chiSq_ [private]

Chi2, sum wts.

Definition at line 186 of file VisCalSolver2.h.

Referenced by chiSq().

Vector<Double> casa::VisCalSolver2::chiSqV_ [private]

Definition at line 187 of file VisCalSolver2.h.

Referenced by chiSqV().

Int casa::VisCalSolver2::cvrgcount_ [private]

Definition at line 193 of file VisCalSolver2.h.

Double casa::VisCalSolver2::dChiSq_ [private]

Definition at line 189 of file VisCalSolver2.h.

Referenced by dChiSq().

Vector<Complex> casa::VisCalSolver2::dpar_ [private]

Parameter update.

Definition at line 203 of file VisCalSolver2.h.

Referenced by dpar().

Vector<DComplex> casa::VisCalSolver2::grad_ [private]

Gradient, Hessian (these are Double for precision in accumulation.

Definition at line 207 of file VisCalSolver2.h.

Referenced by grad().

Vector<Double> casa::VisCalSolver2::hess_ [private]

Definition at line 208 of file VisCalSolver2.h.

Referenced by hess().

Double casa::VisCalSolver2::lambda_ [private]

LM factor.

Definition at line 211 of file VisCalSolver2.h.

Referenced by lambda().

Double casa::VisCalSolver2::lastChiSq_ [private]

Definition at line 188 of file VisCalSolver2.h.

Referenced by lastChiSq().

Vector<Complex> casa::VisCalSolver2::lastPar_ [private]

Definition at line 200 of file VisCalSolver2.h.

Referenced by lastPar().

Int casa::VisCalSolver2::maxIter_ [private]

Maximum number of solve iterations to attempt.

Definition at line 183 of file VisCalSolver2.h.

Referenced by maxIter().

Int casa::VisCalSolver2::nPar_ [private]

Total Number of parameters.

Definition at line 180 of file VisCalSolver2.h.

Referenced by nPar().

Int casa::VisCalSolver2::nWt_ [private]

Definition at line 192 of file VisCalSolver2.h.

Referenced by nWt().

Bool casa::VisCalSolver2::optstep_ [private]

Step optimization toggle.

Definition at line 214 of file VisCalSolver2.h.

Vector<Complex> casa::VisCalSolver2::par_ [private]

Parameter storage (these are Complex to match the VisCal solvePar).

Definition at line 197 of file VisCalSolver2.h.

Referenced by par().

Vector<Float> casa::VisCalSolver2::parErr_ [private]

Definition at line 199 of file VisCalSolver2.h.

Referenced by parErr().

Vector<Bool> casa::VisCalSolver2::parOK_ [private]

Definition at line 198 of file VisCalSolver2.h.

Referenced by parOK().

Int casa::VisCalSolver2::prtlev_ [private]

Diagnostic print level.

Definition at line 217 of file VisCalSolver2.h.

SDBList* casa::VisCalSolver2::SDBs_ [private]

VisBuffer (from outside).

Definition at line 168 of file VisCalSolver2.h.

Referenced by sdbs().

Double casa::VisCalSolver2::sumWt_ [private]

Definition at line 190 of file VisCalSolver2.h.

Referenced by sumWt().

Vector<Double> casa::VisCalSolver2::sumWtV_ [private]

Definition at line 191 of file VisCalSolver2.h.

Referenced by sumWtV().

SolvableVisCal* casa::VisCalSolver2::svc_ [private]

SVC (from outside).

Definition at line 177 of file VisCalSolver2.h.

Referenced by svc().

VisEquation* casa::VisCalSolver2::ve_ [private]

VisEquation (from outside).

Definition at line 174 of file VisCalSolver2.h.

Referenced by ve().

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

• code/synthesis/MeasurementComponents/VisCalSolver2.h