Defines the SBGATObsLightcurve class. More...

#include <SBGATObsLightcurve.hpp>

Inheritance diagram for SBGATObsLightcurve:

Collaboration diagram for SBGATObsLightcurve:

Public Member Functions
	vtkTypeMacro (SBGATObsLightcurve, SBGATObs)

void	PrintSelf (std::ostream &os, vtkIndent indent) override

void	PrintHeader (std::ostream &os, vtkIndent indent) override

void	PrintTrailer (std::ostream &os, vtkIndent indent) override

void	CollectMeasurements (std::vector< std::array< double, 2 > > &measurements, const double &time, const int &N, const arma::vec &sun_dir, const arma::vec &observer_dir, const std::vector< arma::vec > &positions_vec, const std::vector< arma::vec > &velocities_vec, const std::vector< arma::vec > &mrps_vec, const std::vector< arma::vec > &omegas_vec, const bool &penalize_indicence)

void	SaveLightCurveData (const std::vector< std::array< double, 2 > > &measurements, std::string savepath)

Public Member Functions inherited from SBGATObs
	vtkTypeMacro (SBGATObs, vtkPolyDataAlgorithm)

void	PrintSelf (std::ostream &os, vtkIndent indent) override

void	PrintHeader (std::ostream &os, vtkIndent indent) override

void	PrintTrailer (std::ostream &os, vtkIndent indent) override

void	SetScaleMeters ()

void	SetScaleKiloMeters ()

int	get_number_of_bodies () const

Static Public Member Functions
static SBGATObsLightcurve *	New ()

Static Public Member Functions inherited from SBGATObs
static SBGATObs *	New ()

Protected Member Functions
	SBGATObsLightcurve ()

	~SBGATObsLightcurve () override

void	reverse_ray_trace (std::array< double, 2 > &measurements_temp, const std::vector< std::vector< int > > &facets_in_view, const arma::vec &sun_dir, const arma::vec &observer_dir, const int N, const bool penalize_indicence, const std::vector< arma::mat > &BN_dcms_vec, const std::vector< arma::vec > &positions_vec)

Protected Member Functions inherited from SBGATObs
	SBGATObs ()

	~SBGATObs () override

int	RequestData (vtkInformation request, vtkInformationVector inputVector, vtkInformationVector outputVector) override

int	FillInputPortInformation (int port, vtkInformation *info) VTK_OVERRIDE

void	prefind_facets_inview (std::vector< int > &facets_in_view, const unsigned int &body_index, const std::vector< arma::vec > &dir_to_check_vec, const std::vector< arma::mat > &BN_dcms_vec, const std::vector< arma::vec > &positions_vec)

void	find_min_facet_surface_area ()

bool	check_line_for_intersect (const int &origin_body_index, const arma::vec &start_point_origin_body, const arma::vec &end_point_inertial, const std::vector< arma::mat > &BN_dcms_vec, const std::vector< arma::vec > &positions_vec, const double &tol) const

Private Member Functions
	SBGATObsLightcurve (const SBGATObsLightcurve &)=delete

void	operator= (const SBGATObsLightcurve &)=delete

Additional Inherited Members
Protected Attributes inherited from SBGATObs
std::vector< vtkSmartPointer< vtkModifiedBSPTree > >	bspTree_vec

std::vector< vtkPolyData * >	polydata_vec

std::vector< arma::vec >	center_of_mass_vec

double	scaleFactor = 1

double	min_area

int	number_of_bodies

Detailed Description

Defines the SBGATObsLightcurve class.

Author: Benjamin Bercovici; Jay McMahon

Date: October 2018

Defines the SBGATObsLightcurve class, used to generate lightcurves over a single/binary asteroid system at a fixed phase angle

Copyright: MIT License, Benjamin Bercovici and Jay McMahon

Definition at line 45 of file SBGATObsLightcurve.hpp.

Constructor & Destructor Documentation

◆ SBGATObsLightcurve() [1/2]

SBGATObsLightcurve::SBGATObsLightcurve ( )

protected

Definition at line 41 of file SBGATObsLightcurve.cpp.

◆ ~SBGATObsLightcurve()

SBGATObsLightcurve::~SBGATObsLightcurve ( )

overrideprotected

Definition at line 46 of file SBGATObsLightcurve.cpp.

◆ SBGATObsLightcurve() [2/2]

SBGATObsLightcurve::SBGATObsLightcurve ( const SBGATObsLightcurve & )

privatedelete

Member Function Documentation

◆ CollectMeasurements()

void SBGATObsLightcurve::CollectMeasurements	(	std::vector< std::array< double, 2 > > &	measurements,
		const double &	time,
		const int &	N,
		const arma::vec &	sun_dir,
		const arma::vec &	observer_dir,
		const std::vector< arma::vec > &	positions_vec,
		const std::vector< arma::vec > &	velocities_vec,
		const std::vector< arma::vec > &	mrps_vec,
		const std::vector< arma::vec > &	omegas_vec,
		const bool &	penalize_indicence
	)

Computes collected luminosity over the surface of the considered small bodies at the specified time after epoch. Exposure is instantaneous. The luminosity is computed as the number of sample points in view of both the sun and the observer at each time (the "hit count"), normalized by the largest hit count in the observation sequence. The positions of each body is specified. The attitude of each body is supposed to derive from a constant-spin rotation such that each of the dcms BN is equal to identity when dt == 0.

Parameters

measurements	reference to a vector of std::arrays holding (times,luminosity)
time	measurement time
N	minimum number of measurements to produce over the smallest facet in the shape. The number of samples for any other facet will be equal to N * facet_surface_area / smallest_facet_surface_area
sun_dir	unit direction towards sun from target in inertial frame
observer_dir	unit direction towards observer from target in inertial frame
positions_vec	vector of positions of each target's center-of-mass expressed in the primary's body frame
velocities_vec	vector of inertial velocities of each target's center-of-mass expressed in the primary's body frame
mrps_vec	vector of MRPs defining the inertial-to-body DCM [BN]
omegas_vec	vector of angular velocities of each body expressed in the inertial frame
penalize_incidence	if true, each measurement will be weighed by the cos(incidence) angle between the sampled point and the radar squared. If false, all measurements (in view of the radar and not blocked) are weighed equally have the same weight

Definition at line 51 of file SBGATObsLightcurve.cpp.

◆ New()

static SBGATObsLightcurve* SBGATObsLightcurve::New ( )

static

◆ operator=()

void SBGATObsLightcurve::operator= ( const SBGATObsLightcurve & )

privatedelete

◆ PrintHeader()

void SBGATObsLightcurve::PrintHeader	(	std::ostream &	os,
		vtkIndent	indent
	)

override

Definition at line 140 of file SBGATObsLightcurve.cpp.

◆ PrintSelf()

void SBGATObsLightcurve::PrintSelf	(	std::ostream &	os,
		vtkIndent	indent
	)

override

Definition at line 151 of file SBGATObsLightcurve.cpp.

◆ PrintTrailer()

void SBGATObsLightcurve::PrintTrailer	(	std::ostream &	os,
		vtkIndent	indent
	)

override

Definition at line 143 of file SBGATObsLightcurve.cpp.

◆ reverse_ray_trace()

void SBGATObsLightcurve::reverse_ray_trace	(	std::array< double, 2 > &	measurements_temp,
		const std::vector< std::vector< int > > &	facets_in_view,
		const arma::vec &	sun_dir,
		const arma::vec &	observer_dir,
		const int	N,
		const bool	penalize_indicence,
		const std::vector< arma::mat > &	BN_dcms_vec,
		const std::vector< arma::vec > &	positions_vec
	)

protected

Ray traces all of the facets in view to the sun/observer and increment measurement counter if in view

Parameters

measurements_temp	reference to an std::array holding (times,luminosity)
facets_in_view	reference to a vector of vector holding indices of (maybe) illuminated facets for all considered bodies
sun_dir	sun direction expressed in inertial frame
observer_dir	observer direction expressed in inertial frame
BN_dcms_vec	vector holding the DCMs orienting the body frame of each body w/r to inertial
positions_vec	vector holding the position vector of the CM of each body w/r to the primary

Definition at line 161 of file SBGATObsLightcurve.cpp.

◆ SaveLightCurveData()

void SBGATObsLightcurve::SaveLightCurveData	(	const std::vector< std::array< double, 2 > > &	measurements,
		std::string	savepath
	)

Save the raw data points from the unnormalized (times,luminosity) time series to file

Parameters

measurements	reference to a vector of std::arrays holding (times,luminosity)
savepath	path to file where raw lightcurve data will be saved (ex: "output/lightcurve.txt")

Definition at line 124 of file SBGATObsLightcurve.cpp.

◆ vtkTypeMacro()

SBGATObsLightcurve::vtkTypeMacro	(	SBGATObsLightcurve	,
		SBGATObs
	)

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

/Users/bbercovici/GDrive/CUBoulder/Research/code/SBGAT/SbgatCore/include/SbgatCore/SBGATObsLightcurve.hpp
/Users/bbercovici/GDrive/CUBoulder/Research/code/SBGAT/SbgatCore/source/SBGATObsLightcurve.cpp

Public Member Functions

Static Public Member Functions

Protected Member Functions

Private Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ SBGATObsLightcurve() [1/2]

◆ ~SBGATObsLightcurve()

◆ SBGATObsLightcurve() [2/2]

Member Function Documentation

◆ CollectMeasurements()

◆ New()

◆ operator=()

◆ PrintHeader()

◆ PrintSelf()

◆ PrintTrailer()

◆ reverse_ray_trace()

◆ SaveLightCurveData()

◆ vtkTypeMacro()