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#ifndef STRUCTURES_PRIMARY_BEAM_H_
#define STRUCTURES_PRIMARY_BEAM_H_
#include <string>
#include <vector>
#include "primarybeamimageset.h"
#include "../io/imagefilename.h"
#include "../structures/imagingtable.h"
#include "../structures/outputchannelinfo.h"
#include "../msproviders/msprovider.h"
#include <aocommon/coordinatesystem.h>
#include <aocommon/fits/fitswriter.h>
#include <aocommon/fits/fitsreader.h>
#include <aocommon/polarization.h>
#include <aocommon/uvector.h>
#ifdef HAVE_EVERYBEAM
#include <EveryBeam/beammode.h>
#include <EveryBeam/beamnormalisationmode.h>
#include <EveryBeam/load.h>
#endif
namespace wsclean {
class ImageWeights;
class MSDataDescription;
class Settings;
struct BeamInterval {
size_t start_row;
size_t end_row;
double central_time;
};
std::vector<BeamInterval> GetBeamIntervals(MSProvider& ms_provider,
double seconds_before_beam_update);
class PrimaryBeam {
public:
PrimaryBeam(const Settings& settings);
~PrimaryBeam();
void SetPhaseCentre(double ra, double dec, double l_shift, double m_shift) {
phase_centre_ra_ = ra;
phase_centre_dec_ = dec;
l_shift_ = l_shift;
m_shift_ = m_shift;
}
/**
* Read the beam images in and multiply facets with their solution
* gain corrections.
*/
void CorrectBeamForFacetGain(const ImageFilename& image_name,
const ImagingTable::Group& group,
const OutputChannelInfo& channel_info);
PrimaryBeamImageSet LoadFull(const ImageFilename& image_name) {
const std::set<size_t> kFullIndices = {0, 1, 2, 3, 4, 5, 6, 7,
8, 9, 10, 11, 12, 13, 14, 15};
return Load(image_name, kFullIndices);
}
PrimaryBeamImageSet LoadDiagonal(const ImageFilename& image_name) {
const std::set<size_t> kDiagonalIndices = {0, 9, 10, 15};
return Load(image_name, kDiagonalIndices);
}
PrimaryBeamImageSet LoadStokesI(const ImageFilename& image_name) {
const std::set<size_t> kStokesIIndices = {0, 9, 15};
return Load(image_name, kStokesIIndices);
}
void AddMS(std::unique_ptr<MSDataDescription> description);
void MakeOrReuse(const ImageFilename& image_name,
const ImagingTableEntry& entry,
std::shared_ptr<ImageWeights> image_weights,
size_t field_id);
void MakeUnitary(const ImagingTableEntry& entry,
const ImageFilename& image_name, const Settings& settings);
/**
* Correct images for the primary beam by multiplying the input image
* by the (simplified) inverse of the beam.
*
* @param writer used for writing the beam fits images.
* @param image_name Image name object from which prefixes or polarization can
* be derived.
* @param filename_kind string specifying which image will be corrected.
*/
void CorrectImages(aocommon::FitsWriter& writer,
const ImageFilename& image_name,
const std::string& filename_kind);
size_t GetUndersamplingFactor() const { return undersample_; };
size_t GetBeamUpdateTime() const { return seconds_before_beam_update_; };
private:
// Compute undersampling factor from the primaryBeamGridSize.
// In case of rectangular images, the undersampling factor is derived
// from the shortest dimension.
static size_t computeUndersamplingFactor(const Settings& settings);
const Settings& settings_;
double phase_centre_ra_, phase_centre_dec_, l_shift_, m_shift_;
const size_t undersample_;
const size_t seconds_before_beam_update_;
#ifdef HAVE_EVERYBEAM
const everybeam::BeamMode beam_mode_;
const everybeam::BeamNormalisationMode beam_normalisation_mode_;
#endif
std::vector<std::unique_ptr<MSDataDescription>> ms_list_;
struct MSProviderInfo {
MSProviderInfo(MSProvider* _provider,
const schaapcommon::reordering::MSSelection* _selection,
size_t _ms_index)
: provider(_provider), selection(_selection), ms_index(_ms_index) {}
MSProvider* provider;
const schaapcommon::reordering::MSSelection* selection;
size_t ms_index;
};
std::vector<MSProviderInfo> ms_providers_;
PrimaryBeamImageSet Load(const ImageFilename& image_name,
const std::set<size_t>& elements);
#ifdef HAVE_EVERYBEAM
/**
* @brief Lower triangular matrix representation of baseline weights.
*
*/
class WeightMatrix {
public:
explicit WeightMatrix(size_t n_antenna)
: n_antenna_(n_antenna), weights_(n_antenna * n_antenna, 0) {}
double& Value(size_t a1, size_t a2) {
if (a1 < a2)
return weights_[a1 * n_antenna_ + a2];
else
return weights_[a1 + a2 * n_antenna_];
}
const double& Value(size_t a1, size_t a2) const {
if (a1 < a2)
return weights_[a1 * n_antenna_ + a2];
else
return weights_[a1 + a2 * n_antenna_];
}
/**
* @brief Get the weights per baseline
*
* @return aocommon::UVector<double>
*/
aocommon::UVector<double> GetBaselineWeights() const {
int nbaselines = n_antenna_ * (n_antenna_ + 1) / 2;
aocommon::UVector<double> baseline_weights(nbaselines, 0);
int index = 0;
for (size_t a1 = 0; a1 != n_antenna_; ++a1) {
for (size_t a2 = a1; a2 != n_antenna_; ++a2) {
baseline_weights[index] = weights_[a1 * n_antenna_ + a2];
++index;
}
}
return baseline_weights;
}
private:
size_t n_antenna_;
aocommon::UVector<double> weights_;
};
void MakeImage(const ImageFilename& image_name,
const ImagingTableEntry& entry,
std::shared_ptr<ImageWeights> image_weights, size_t field_id);
/**
* Calculate the average beam for one measurement set.
* @param result The average beam values are assigned to this vector.
*/
double MakeBeamForMS(std::vector<aocommon::HMC4x4>& result,
MSProvider& ms_provider,
const schaapcommon::reordering::MSSelection& selection,
const ImageWeights& image_weights,
const aocommon::CoordinateSystem& coordinate_system,
double central_frequency, size_t field_id);
static void CalculateStationWeights(
const ImageWeights& image_weights, WeightMatrix& baseline_weights,
SynchronizedMS& ms, MSReader& ms_reader,
const schaapcommon::reordering::MSSelection& selection,
size_t& current_row, size_t end_row);
#endif // HAVE_EVERYBEAM
};
} // namespace wsclean
#endif // STRUCTURES_PRIMARY_BEAM_H_
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