Class to cache the deltaTs or parts of their calculation for fast map making. More...

#include <InterferometryCache.h>

Public Member Functions
	InterferometryCache ()

	InterferometryCache (CrossCorrelator cc, const AnalysisReco reco)

void	init (CrossCorrelator cc, const AnalysisReco reco, bool forceCacheRecalculation=false)
	Initialize the cache, only needs to be done once. More...

int	coarseIndex (int pol, int combo, int phiBin, int thetaBin)
	Get the internal array index for the fDeltaTs vector (for coarsely binned InterferometericMap) More...

double	coarseDt (int pol, int combo, int phiBin, int thetaBin)
	Look up the delay for the antenna pair / polarization at a given angle. More...

int	partBAsIndex (int pol, int combo, int fineThetaBin)
	Get the index for part of the deltaT calculation for the finely binned InterferometricMap. More...

int	zoomedCosPartIndex (int pol, int ant, int finePhiBin)
	Get the index for part of the deltaT calculation for the finely binned InterferometricMap. More...

int	part21sIndex (int pol, int combo, int finePhiBin)

void	populateCache (CrossCorrelator cc, const AnalysisReco reco)

void	populateFineCache (CrossCorrelator cc, const AnalysisReco reco)

Public Attributes
int	fUseOffAxisDelay
	Should we use the off-axis delay? Set to 1 or 0 as it's used in a multiplication for speed.

bool	fInitialized
	Has the cache been initialized?

int	fNCoarseBinsPhi
	The number of phi bins in the coarsely binned interferometric map.

int	fNCoarseBinsTheta
	The number of theta bins in the coarsely binned interferometric map.

int	fNumCombos
	The number of possible antenna pairs to be correlated.

std::vector< double >	fDeltaTs
	Delays between antenna pairs for the coarsely binned interferometric map.

int	fNFineBinsPhi
	If a finely binned InterferometricMap extended over all 360 in phi (plus edge effects) it would have this many bins.

int	fNFineBinsTheta
	If a finely binned InterferometricMap extended over all theta (plus edge effects) it would have this many bins.

std::vector< double >	fPartBAsZoom
	Partial caching for the finely binned InterferometricMap. More...

std::vector< double >	fPart21sZoom
	Partial caching for the finely binned InterferometricMap.

std::vector< double >	fZoomedThetaWaves
	Values of theta (radians) for the finely binned InterferometricMap.

std::vector< double >	fZoomedTanThetaWaves
	Values of tan(theta) for the finely binned InterferometricMap.

std::vector< double >	fZoomedCosThetaWaves
	Values of cos(theta) for the finely binned InterferometricMap.

std::vector< double >	fDtFactors
	Multiplier factor for the finely binned InterferometricMap.

std::vector< double >	fZoomedPhiWaveLookup
	The value of phi in each bin in radians.

std::vector< double >	fZoomedCosPartLookup
	Partial caching for the of the deltaT calculation.

std::vector< double >	fOffAxisDelays
	Off-axis delays for use when making fine binned InterferometricMap.

std::vector< double >	fOffAxisDelaysDivided
	Same as fOffAxisDelays, but delays scaled to remove an operation from an inner loop in InterfermetricMap.

Friends
class	InterferometricMap

Detailed Description

Class to cache the deltaTs or parts of their calculation for fast map making.

It's a glorified set of std::vectors with some indexing logic

Definition at line 22 of file InterferometryCache.h.

Collaboration diagram for Acclaim::InterferometryCache:

[legend]

Constructor & Destructor Documentation

Acclaim::InterferometryCache::InterferometryCache ( )

Default constructor, not very useful

Definition at line 5 of file InterferometryCache.cxx.

Acclaim::InterferometryCache::InterferometryCache	(	CrossCorrelator *	cc,
		const AnalysisReco *	reco
	)

Useful constructor

Parameters

cc	is a pointer to a CrossCorrelator
reco	is a pointer to an AnalysisReco

Definition at line 12 of file InterferometryCache.cxx.

Member Function Documentation

double Acclaim::InterferometryCache::coarseDt	(	int	pol,
		int	combo,
		int	phiBin,
		int	thetaBin
	)

inline

Look up the delay for the antenna pair / polarization at a given angle.

Parameters

pol	is the polarization
combo	is an index for the antenna pair
phiBin	is the azimuthal bin (counting from 0) of the coarsely binned InterferometricMap
thetaBin	is the elevation bin (counting from 0) of the coarsely binned InterferometricMap

Returns: the delay between the antenna pair

Definition at line 73 of file InterferometryCache.h.

int Acclaim::InterferometryCache::coarseIndex	(	int	pol,
		int	combo,
		int	phiBin,
		int	thetaBin
	)

inline

Get the internal array index for the fDeltaTs vector (for coarsely binned InterferometericMap)

Parameters

pol	is the polarization
combo	is an index for the antenna pair
phiBin	is the azimuthal bin (counting from 0) of the coarsely binned InterferometricMap
thetaBin	is the elevation bin (counting from 0) of the coarsely binned InterferometricMap

Returns: the index for fDeltaTs

Definition at line 59 of file InterferometryCache.h.

void Acclaim::InterferometryCache::init	(	CrossCorrelator *	cc,
		const AnalysisReco *	reco,
		bool	forceCacheRecalculation = `false`
	)

Initialize the cache, only needs to be done once.

Parameters

cc	is a pointer to the CrossCorrelator
reco	is a pointer to the AnalysisReco
forceCacheRecalculation	set true to calculate the cached delays even if they've already been calculated.

Definition at line 21 of file InterferometryCache.cxx.

int Acclaim::InterferometryCache::part21sIndex	(	int	pol,
		int	combo,
		int	finePhiBin
	)

inline

Get the index for the phi part of the deltaT calculation for the finely binned InterferometricMap

Parameters

pol	is the polarization
combo	is an index for the antenna pair
finePhiBin	the phi bin of the antenna pair (considering the full range of azimuth at the finely binned resolution)

Returns: the index for the fPart21sZoom

Definition at line 116 of file InterferometryCache.h.

int Acclaim::InterferometryCache::partBAsIndex	(	int	pol,
		int	combo,
		int	fineThetaBin
	)

inline

Get the index for part of the deltaT calculation for the finely binned InterferometricMap.

At the current resolution caching the full set of dts for the finely binned InterferometricMap is too large to calculate over all azimuth/elevation

Parameters

pol	is the polarization
combo	is an index for the antenna pair
fineThetaBin	the theta bin of the antenna pair (considering the full range of theta at the finely binned resolution)

Returns: the index for the fPartBAsZoom

Definition at line 88 of file InterferometryCache.h.

void Acclaim::InterferometryCache::populateCache	(	CrossCorrelator *	cc,
		const AnalysisReco *	reco
	)

Populate the fDeltaTs cache for the coarsely binned InterferometricMap

Parameters

cc	is the CrossCorrelator
reco	is the AnalysisReco

Definition at line 29 of file InterferometryCache.cxx.

void Acclaim::InterferometryCache::populateFineCache	(	CrossCorrelator *	cc,
		const AnalysisReco *	reco
	)

Populate the various caches for the finely binned InterferometricMap

Parameters

cc	is the CrossCorrelator
reco	is the AnalysisReco

Definition at line 79 of file InterferometryCache.cxx.

int Acclaim::InterferometryCache::zoomedCosPartIndex	(	int	pol,
		int	ant,
		int	finePhiBin
	)

inline

Get the index for part of the deltaT calculation for the finely binned InterferometricMap.

At the current resolution caching the full set of dts for the finely binned InterferometricMap is too large to calculate over all azimuth/elevation

Parameters

pol	is the polarization
ant	is the antenna
finePhiBin	the phi bin of the antenna pair (considering the full range of azimuth at the finely binned resolution)

Returns: the index for the fZoomedCosPartLookup

Definition at line 103 of file InterferometryCache.h.

Member Data Documentation

std::vector<double> Acclaim::InterferometryCache::fPartBAsZoom

Partial caching for the finely binned InterferometricMap.

The following variables represent a partial caching of the finely binned InterferometricMap dts. Calculating the full set of deltaTs would use too much memory. These are partially cached such that the minimize the dt calculations in an inner loop in InterferometricMap. I'm don't think the cached quantities are very physically meaningful and as such they have silly names.

Definition at line 155 of file InterferometryCache.h.

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

components/anitaAnalysisTools/include/InterferometryCache.h
components/anitaAnalysisTools/src/InterferometryCache.cxx

Public Member Functions

Public Attributes

Friends

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation