Pulsar::ImageCorrection Class Reference

Corrects band-reversed signal due to poor image rejection. More...

#include <ImageCorrection.h>

Inheritance diagram for Pulsar::ImageCorrection:

Public Member Functions
	ImageCorrection ()
	Default constructor.
void	correct (Archive *)
	Perform correction on full archive.
void	transform (Integration *)
	Perform correction on one integration.
virtual TextInterface::Parser *	get_interface ()
	Return a text interface that can be used to configure this instance.
void	set_strict (bool flag=true)
	Set strict mode.
bool	get_strict () const
	Get strict setting.
void	set_coherent (bool flag=true)
	Set coherent dedisp flag.
bool	get_coherent () const
	Get coherent dedisp flag.
void	set_fadc (double f)
	Set center freq at sampler.
double	get_fadc () const
	Set center freq at sampler.
void	set_fcenter (double f)
	Set sky center freq.
double	get_fcenter () const
	Get sky center freq.
void	set_band_dir (int d)
	Set band direction at sampler.
int	get_band_dir () const
	Get band direction.
void	set_dt (double dt0, double dt1)
	Set dt per poln.
void	set_gain (double a0, double a1)
	Set gain per poln.
Public Member Functions inherited from Pulsar::Transformation< Integration >
void	operator() (Integration *container)
	Functor interface.
Public Member Functions inherited from Reference::Able
	Able (const Able &)
Able &	operator= (const Able &)
unsigned	get_reference_count () const
Public Member Functions inherited from Reference::HeapTracked
	HeapTracked (const HeapTracked &)
HeapTracked &	operator= (const HeapTracked &)
bool	__is_on_heap () const

Protected Member Functions
double	f_adc (double f_sky) const
double	ratio (double f, unsigned ipol) const
	The ratio of image power from input sampler freq f.
int	match_channel (const Integration *subint, double f_sky) const
	Find channel matching given sky freq, returns -1 for no match.
Protected Member Functions inherited from Reference::Able
Handle *	__reference (bool active) const
void	__dereference (bool auto_delete=true) const

Protected Attributes
double	f_cent_adc
	The center frequency of the band at the ADC (MHz)
double	f_cent_sky
	The center sky frequency of the sampled band (MHz)
int	dir
	Band direction at the sampler.
bool	strict
	strict==true means uncorrectable channels will be zero-weighted
bool	coherent
	Set true if data have been coherently dedispersed.
double	dt [2]
	The time misalignment between samplers, per-poln (us)
double	alpha [2]
	The gain mismatch between samplers, per-poln.

Additional Inherited Members
Static Public Member Functions inherited from Reference::Able
static size_t	get_instance_count ()
Static Public Member Functions inherited from Reference::HeapTracked
static void *	operator new (size_t size, void *ptr=0)
static void	operator delete (void *location, void *ptr)
static void	operator delete (void *location)
static size_t	get_heap_queue_size ()

Detailed Description

Corrects band-reversed signal due to poor image rejection.

Member Function Documentation

ratio()

double Pulsar::ImageCorrection::ratio ( double f, unsigned ipol ) const

protected

The ratio of image power from input sampler freq f.

See equations 2 and 3 from Kurosawa et al (2001)

References alpha, dt, f_cent_adc, and f_cent_sky.

Referenced by transform().

transform()

void Pulsar::ImageCorrection::transform ( Integration * data )

virtual

Perform correction on one integration.

Implements Pulsar::Transformation< Integration >.

References Pulsar::Integration::clone(), Signal::Coherence, coherent, dt, f_cent_sky, Pulsar::Integration::get_bandwidth(), Pulsar::Integration::get_centre_frequency(), Pulsar::Integration::get_dedispersed(), Pulsar::Integration::get_dispersion_measure(), Pulsar::Integration::get_folding_period(), Pulsar::Integration::get_nbin(), Pulsar::Integration::get_nchan(), Pulsar::Integration::get_npol(), Pulsar::Integration::get_Profile(), Pulsar::Integration::get_state(), Pulsar::Integration::get_weight(), match_channel(), ratio(), Pulsar::Integration::set_weight(), strict, and Pulsar::Profile::verbose.

Referenced by correct().

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

• ImageCorrection.h
• ImageCorrection.C