mx::AO::analysis::vonKarmanSpectrum< realT > Struct Template Reference

template<typename realT>
struct mx::AO::analysis::vonKarmanSpectrum< realT >

Manage calculations using the von Karman spatial power spectrum.

This very general PSD has the form

\[ \mathcal{P}(k) = \frac{\beta}{ ( k^2 + k_0^2) ^{\alpha/2}} \]

Where \( k \) is spatial frequency, \( \beta \) is a normalization constant, and outer scale \( L_0 \) is included via \( k_0 = 1/L_0 \). For \( L_0 \rightarrow \infty \) this becomes a simple power law with index \( \alpha \).

For atmospheric turbulence \( \alpha = 11/3 \) and the normalization is

\[ \beta = \frac{\mathcal{A}_p}{r_0^{5/3}} \]

where \( A_p = 0.0218...\) (see mx::AO::constants::a_PSD ).

Definition at line 83 of file aoPSDs.hpp.

#include <ao/analysis/aoPSDs.hpp>

Public Member Functions
	vonKarmanSpectrum ()
	Default Constructor.
	vonKarmanSpectrum (bool subP, bool subT, realT D)
	Constructor specifying the parameters.
bool	subPiston ()
	Get the value of m_subPiston.
void	subPiston (bool sp)
	Set the value of m_subPiston.
bool	subTipTilt ()
	Get the value of m_subTipTilt.
void	subTipTilt (bool st)
	Set the value of the m_subTipTilt flag.
bool	scintillation ()
	Get the value of m_scintillation.
void	scintillation (bool sc)
	Set the value of m_scintillation.
int	component ()
	Get the value of m_component.
int	component (int cc)
	Set the value of m_component.
realT	D ()
	Get the value of the diameter m_D.
void	D (realT nd)
	Set the aperture diameter.
template<class psdParamsT >
realT	operator() (psdParamsT &par, size_t layer_i, realT k, realT sec_zeta)
	Get the value of the PSD at spatial frequency k and a zenith distance.
template<class psdParamsT >
realT	operator() (psdParamsT &par, size_t layer_i, realT k, realT lambda, realT lambda_wfs, realT secZeta)
template<typename iosT >
iosT &	dumpPSD (iosT &ios)
	Get the fitting error for an actuator spacing d.
void	setupConfig (app::appConfigurator &config)
	Setup the configurator to configure this class.
void	loadConfig (app::appConfigurator &config)
	Load the configuration of this class from a configurator.

Protected Attributes
bool	m_subPiston { true }
	flag controlling whether piston is subtracted from the PSD. Default is true.
bool	m_subTipTilt
	flag controlling whether tip and tilt are subtracted from the PSD. Default is false.
bool	m_scintillation { false }
	flag controlling whether or not scintillation is included
int	m_component { PSDComponent::phase }
realT	m_D { 1.0 }
	Diameter used for piston and tip/tilt subtraction, in m. Default is 1 m.

Constructor & Destructor Documentation

vonKarmanSpectrum() [1/2]

template<typename realT >

mx::AO::analysis::vonKarmanSpectrum< realT >::vonKarmanSpectrum

(

)

Default Constructor.

Definition at line 223 of file aoPSDs.hpp.

vonKarmanSpectrum() [2/2]

template<typename realT >

mx::AO::analysis::vonKarmanSpectrum< realT >::vonKarmanSpectrum	(	bool	subP,
		bool	subT,
		realT	D
	)

Constructor specifying the parameters.

Parameters

[in]	subP	is the value of m_subPiston.
[in]	subT	is the value of m_subTipTilt.
[in]	D	is the value of m_D.

Definition at line 228 of file aoPSDs.hpp.

Member Function Documentation

component() [1/2]

template<typename realT >

int mx::AO::analysis::vonKarmanSpectrum< realT >::component

(

)

Get the value of m_component.

Returns

m_component

Definition at line 275 of file aoPSDs.hpp.

component() [2/2]

template<typename realT >

int mx::AO::analysis::vonKarmanSpectrum< realT >::component

(

int

cc

)

Set the value of m_component.

Parameters

[in]

cc

the new value of m_component

Definition at line 281 of file aoPSDs.hpp.

D() [1/2]

template<typename realT >

realT mx::AO::analysis::vonKarmanSpectrum< realT >::D

(

)

Get the value of the diameter m_D.

Returns

the current value of m_D, the diameter in m.

Definition at line 295 of file aoPSDs.hpp.

D() [2/2]

template<typename realT >

void mx::AO::analysis::vonKarmanSpectrum< realT >::D

(

realT

nd

)

Set the aperture diameter.

Parameters

[in]

nd

the new diameter in m

Definition at line 301 of file aoPSDs.hpp.

dumpPSD()

template<typename realT >

template<typename iosT >

iosT & mx::AO::analysis::vonKarmanSpectrum< realT >::dumpPSD

(

iosT &

ios

)

Get the fitting error for an actuator spacing d.

Todo:

generatlize for different alpha and beta

Parameters

atm	gives the atmosphere parameters r_0 and L_0
d	is the actuator spacing in m

Definition at line 428 of file aoPSDs.hpp.

loadConfig()

template<typename realT >

void mx::AO::analysis::vonKarmanSpectrum< realT >::loadConfig

(

app::appConfigurator &

config

)

Load the configuration of this class from a configurator.

Test:

Loading aoAtmosphere config settings [test doc]

Parameters

[in]

config

the app::configurator object

Definition at line 462 of file aoPSDs.hpp.

operator()() [1/2]

template<typename realT >

template<class psdParamsT >

realT mx::AO::analysis::vonKarmanSpectrum< realT >::operator()	(	psdParamsT &	par,
		size_t	layer_i,
		realT	k,
		realT	lambda,
		realT	lambda_wfs,
		realT	secZeta
	)

Get the value of the PSD at spatial frequency k and wavelength lambda, and a zenith distance, with a WFS at a different wavelength

Returns

the von Karman PSD at the specified spatial frequency for the specified wavelength.

-1 if an error occurs.

Parameters

[in]	par	gives the PSD parameters.
[in]	k	is the spatial frequency in m^-1.
[in]	lambda	is the observation wavelength in m
[in]	lambda_wfs	is the wavefront measurement wavelength in m
[in]	secZeta	is the secant of the zenith distance

Definition at line 364 of file aoPSDs.hpp.

operator()() [2/2]

template<typename realT >

template<class psdParamsT >

realT mx::AO::analysis::vonKarmanSpectrum< realT >::operator()	(	psdParamsT &	par,
		size_t	layer_i,
		realT	k,
		realT	sec_zeta
	)

Get the value of the PSD at spatial frequency k and a zenith distance.

Returns

the von Karman PSD at the specified spatial frequency.

-1 if an error occurs.

Todo:

this needs to handle layers with different L_0

Parameters

[in]	par	gives the PSD parameters.
[in]	k	is the spatial frequency in m^-1.
[in]	sec_zeta	is the secant of the zenith distance.

Definition at line 308 of file aoPSDs.hpp.

References mx::math::func::jinc(), mx::math::func::jincN(), and mx::math::six_fifths().

scintillation() [1/2]

template<typename realT >

bool mx::AO::analysis::vonKarmanSpectrum< realT >::scintillation

(

)

Get the value of m_scintillation.

Returns

m_scintillation

Definition at line 263 of file aoPSDs.hpp.

scintillation() [2/2]

template<typename realT >

void mx::AO::analysis::vonKarmanSpectrum< realT >::scintillation

(

bool

sc

)

Set the value of m_scintillation.

Parameters

[in]

sc

the new value of m_scintillation

Definition at line 269 of file aoPSDs.hpp.

setupConfig()

template<typename realT >

void mx::AO::analysis::vonKarmanSpectrum< realT >::setupConfig

(

app::appConfigurator &

config

)

Setup the configurator to configure this class.

Test:

Loading aoAtmosphere config settings [test doc]

Parameters

[in]

config

the app::configurator object

Definition at line 441 of file aoPSDs.hpp.

References mx::app::appConfigurator::add().

subPiston() [1/2]

template<typename realT >

bool mx::AO::analysis::vonKarmanSpectrum< realT >::subPiston

(

)

Get the value of m_subPiston.

Returns

m_subPiston

Definition at line 239 of file aoPSDs.hpp.

subPiston() [2/2]

template<typename realT >

void mx::AO::analysis::vonKarmanSpectrum< realT >::subPiston

(

bool

sp

)

Set the value of m_subPiston.

Parameters

[in]

sp

is the new value of m_subPiston

Definition at line 245 of file aoPSDs.hpp.

subTipTilt() [1/2]

template<typename realT >

bool mx::AO::analysis::vonKarmanSpectrum< realT >::subTipTilt

(

)

Get the value of m_subTipTilt.

Returns

the value of m_subTipTilt.

Definition at line 251 of file aoPSDs.hpp.

subTipTilt() [2/2]

template<typename realT >

void mx::AO::analysis::vonKarmanSpectrum< realT >::subTipTilt

(

bool

st

)

Set the value of the m_subTipTilt flag.

Parameters

[in]

st

the new value of m_subTipTilt.

Definition at line 257 of file aoPSDs.hpp.

Member Data Documentation

m_component

template<typename realT >

int mx::AO::analysis::vonKarmanSpectrum< realT >::m_component { PSDComponent::phase }

protected

If m_scintillation is true, this controls whether phase (0), amplitude (1), or dispersive contrast (2) is returned.

Definition at line 92 of file aoPSDs.hpp.

m_D

template<typename realT >

realT mx::AO::analysis::vonKarmanSpectrum< realT >::m_D { 1.0 }

protected

Diameter used for piston and tip/tilt subtraction, in m. Default is 1 m.

Definition at line 95 of file aoPSDs.hpp.

m_scintillation

template<typename realT >

bool mx::AO::analysis::vonKarmanSpectrum< realT >::m_scintillation { false }

protected

flag controlling whether or not scintillation is included

Definition at line 91 of file aoPSDs.hpp.

m_subPiston

template<typename realT >

bool mx::AO::analysis::vonKarmanSpectrum< realT >::m_subPiston { true }

protected

flag controlling whether piston is subtracted from the PSD. Default is true.

Definition at line 87 of file aoPSDs.hpp.

m_subTipTilt

template<typename realT >

bool mx::AO::analysis::vonKarmanSpectrum< realT >::m_subTipTilt

protected

Initial value:

{
        false }

flag controlling whether tip and tilt are subtracted from the PSD. Default is false.

Definition at line 88 of file aoPSDs.hpp.

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

• ao/analysis/aoPSDs.hpp