dp3::ddecal::BdaSolverBuffer Class Reference

#include <BdaSolverBuffer.h>

Classes
struct	IntervalRow

Public Member Functions
	BdaSolverBuffer (double start, double interval, size_t n_baselines)
void	AdvanceInterval ()
void	AppendAndWeight (std::unique_ptr< base::BdaBuffer > buffer, const std::vector< std::string > &direction_names, bool keep_unweighted_model_data)
void	ApplySolutions (const std::vector< std::vector< std::complex< double >>> &solutions, const std::vector< double > &channel_block_start_frequencies, size_t n_polarizations, const std::vector< int > &antenna1, const std::vector< int > &antenna2, const std::vector< std::vector< double >> &channel_frequencies)
size_t	BufferCount () const
void	Clear ()
double	CurrentIntervalStart () const
int	GetCurrentInterval () const
std::vector< std::unique_ptr< base::BdaBuffer > >	GetDone ()
const std::vector< IntervalRow > &	GetIntervalRows () const
double	IntervalDuration () const
bool	IntervalIsComplete () const

Constructor & Destructor Documentation

BdaSolverBuffer()

dp3::ddecal::BdaSolverBuffer::BdaSolverBuffer ( double  start, double  interval, size_t  n_baselines  )

inline

Constructor.

Parameters

start	Start time of the first solution interval.
interval	Length of a solution interval. Should be > 0.0.
n_baselines	The number of baselines.

Member Function Documentation

AdvanceInterval()

void dp3::ddecal::BdaSolverBuffer::AdvanceInterval

(

)

Advances the current solution interval to the next interval. Releases all internal buffers that only hold data for previous solution intervals.

AppendAndWeight()

void dp3::ddecal::BdaSolverBuffer::AppendAndWeight	(	std::unique_ptr< base::BdaBuffer >	buffer,
		const std::vector< std::string > &	direction_names,
		bool	keep_unweighted_model_data
	)

This function takes a buffer with unweighted data and the corresponding weights. It weights these data buffers and stores the result internally.

Parameters

buffer	A buffer with unweighted data, unweighted model data for each direction, weights and flags.
direction_names	The names of the model data buffers in 'buffer'.
keep_unweighted_model_data	True: Keep the original unweighted model data. GetDone() will return the original buffers, including that model data. False: Delete the unweighted model data. GetDone() will return buffers without any model data for the given directions.

ApplySolutions()

void dp3::ddecal::BdaSolverBuffer::ApplySolutions	(	const std::vector< std::vector< std::complex< double >>> &	solutions,
		const std::vector< double > &	channel_block_start_frequencies,
		size_t	n_polarizations,
		const std::vector< int > &	antenna1,
		const std::vector< int > &	antenna2,
		const std::vector< std::vector< double >> &	channel_frequencies
	)

Apply solutions to the unweighted predicted model visibilities.

Parameters

solutions	Solutions generated by a BdaSolver.
channel_block_start_frequencies	Start frequencies for each channel block. This vector has (n_channel_blocks + 1) items: The start frequency of a block is the end frequency of the previous block.
n_polarizations	Number of polarizations in the solution. Should be 1, 2 or 4.
antenna1	For each baseline, the index of the first antenna.
antenna2	For each baseline, the index of the second antenna.
channel_frequencies	For each baseline, the center frequencies of all BDA rows.

BufferCount()

size_t dp3::ddecal::BdaSolverBuffer::BufferCount ( ) const

inline

Get the number of active buffers, which is the number of AppendAndWeight() calls minus the number of buffers that AdvanceInterval() released.

Returns

The number of active buffers.

Clear()

void dp3::ddecal::BdaSolverBuffer::Clear

(

)

Clears all internal buffers. Does not affect the solution interval and the number of directions.

CurrentIntervalStart()

double dp3::ddecal::BdaSolverBuffer::CurrentIntervalStart ( ) const

inline

Start time of the current interval. This interval will not have any visibilities for which the time centroid is smaller than this value.

GetCurrentInterval()

int dp3::ddecal::BdaSolverBuffer::GetCurrentInterval ( ) const

inline

Returns

The absolute index of the current solution interval.

GetDone()

std::vector<std::unique_ptr<base::BdaBuffer> > dp3::ddecal::BdaSolverBuffer::GetDone ( )

inline

Retrieve all unweighted input buffers which only hold data for previous solution intervals. The BdaSolverBuffer is done processing those buffers. The BdaSolverBuffer returns the buffers in the same order as they were added using AppendAndWeight().

Returns

A possibly empty list of processed unweighted input buffers.

GetIntervalRows()

const std::vector<IntervalRow>& dp3::ddecal::BdaSolverBuffer::GetIntervalRows ( ) const

inline

Get the content for the current solution interval. It consists of meta data and pointers to visibilities (weighted, unweighted, and model visibilities) for each BDA row.

IntervalDuration()

double dp3::ddecal::BdaSolverBuffer::IntervalDuration ( ) const

inline

Duration of this interval. Given that visibilities are placed in an interval based on their centroid, this is the maximum difference between the centroid times of visibilities in the same interval, and is always larger than zero.

IntervalIsComplete()

bool dp3::ddecal::BdaSolverBuffer::IntervalIsComplete ( ) const

inline

Returns

True if the current solution interval is complete. An interval is complete if the solver buffer contains a BDA row with a start time greater or equal to the end time of the current solution interval.

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

• BdaSolverBuffer.h