예제 #1
0
void TimeFrequencyImager::WriteNewFlagsPart(Mask2DCPtr newXX, Mask2DCPtr newXY, Mask2DCPtr newYX, Mask2DCPtr newYY, int antenna1, int antenna2, int spectralWindow, size_t timeOffset, size_t timeEnd, size_t leftBorder, size_t rightBorder)
{
	initializePolarizations();
	checkPolarizations();

	size_t frequencyCount = _measurementSet->FrequencyCount();

	std::map<double,size_t> observationTimes;
	setObservationTimes(*_measurementSet, observationTimes);

	casa::Table *table = _measurementSet->OpenTable(true);
	casa::ScalarColumn<int> antenna1Column(*table, "ANTENNA1"); 
	casa::ScalarColumn<int> antenna2Column(*table, "ANTENNA2");
	casa::ScalarColumn<int> windowColumn(*table, "DATA_DESC_ID");
	casa::ScalarColumn<double> timeColumn(*table, "TIME");
	casa::ArrayColumn<bool> flagColumn(*table, "FLAG");

	ScalarColumnIterator<int> antenna1Iter = ScalarColumnIterator<int>::First(antenna1Column);
	ScalarColumnIterator<int> antenna2Iter = ScalarColumnIterator<int>::First(antenna2Column);
	ScalarColumnIterator<int> windowIter = ScalarColumnIterator<int>::First(windowColumn);
	ScalarColumnIterator<double> timeIter = ScalarColumnIterator<double>::First(timeColumn);
	ArrayColumnIterator<bool> flagIter = ArrayColumnIterator<bool>::First(flagColumn);

	if(frequencyCount != newXX->Height())
	{
		std::cerr << "The frequency count in the measurement set (" << frequencyCount << ") does not match the image!" << std::endl;
	}
	if(timeEnd - timeOffset != newXX->Width())
	{
		std::cerr << "The number of time scans to write in the measurement set (" << (timeEnd - timeOffset) << ") does not match the image (" << newXX->Width() << ") !" << std::endl;
	}

	size_t rowsWritten = 0;
	for(size_t i=0;i<table->nrow();++i) {
		if((*antenna1Iter) == (int) antenna1 &&
		   (*antenna2Iter) == (int) antenna2 &&
		   (*windowIter) == (int) spectralWindow)
		{
			double time = *timeIter;
			size_t timeIndex = observationTimes.find(time)->second;
			if(timeIndex >= timeOffset + leftBorder && timeIndex < timeEnd - rightBorder)
			{
				casa::Array<bool> flag = *flagIter;
				casa::Array<bool>::iterator j = flag.begin();
				for(size_t f=0;f<(size_t) frequencyCount;++f) {
					if(_stokesIIndex >= 0)
					{
						if(_readStokesIDirectly) *j = newXX->Value(timeIndex - timeOffset, f);
						++j;
					}
					if(_xxIndex >= 0)
					{
						if(_readXX) *j = newXX->Value(timeIndex - timeOffset, f);
						++j;
					}
					if(_xyIndex >= 0)
					{
						if(_readXY) *j = newXY->Value(timeIndex - timeOffset, f);
						++j;
					}
					if(_yxIndex >= 0)
					{
						if(_readYX) *j = newYX->Value(timeIndex - timeOffset, f);
						++j;
					}
					if(_yyIndex >= 0)
					{
						if(_readYY) *j = newYY->Value(timeIndex - timeOffset, f);
						++j;
					}
				}
				flagIter.Set(flag);
				++rowsWritten;
			}
		}

		++antenna1Iter;
		++antenna2Iter;
		++timeIter;
		++windowIter;
		++flagIter;
	}
	AOLogger::Debug << "Rows written: " << rowsWritten << '\n';

	delete table;
}
예제 #2
0
void actionCollect(const std::string &filename, enum CollectingMode mode, StatisticsCollection &statisticsCollection, HistogramCollection &histogramCollection, bool mwaChannels, size_t flaggedTimesteps, const std::set<size_t> &flaggedAntennae)
{
	MeasurementSet *ms = new MeasurementSet(filename);
	const unsigned polarizationCount = ms->PolarizationCount();
	const unsigned bandCount = ms->BandCount();
	const bool ignoreChannelZero = ms->IsChannelZeroRubish();
	const std::string stationName = ms->GetStationName();
	BandInfo *bands = new BandInfo[bandCount];
	double **frequencies = new double*[bandCount];
	unsigned totalChannels = 0;
	for(unsigned b=0;b<bandCount;++b)
	{
		bands[b] = ms->GetBandInfo(b);
		frequencies[b] = new double[bands[b].channels.size()];
		totalChannels += bands[b].channels.size();
		for(unsigned c=0;c<bands[b].channels.size();++c)
		{
			frequencies[b][c] = bands[b].channels[c].frequencyHz;
		}
	}
	delete ms;
	
	std::cout
		<< "Polarizations: " << polarizationCount << '\n'
		<< "Bands: " << bandCount << '\n'
		<< "Channels/band: " << (totalChannels / bandCount) << '\n';
	if(ignoreChannelZero)
		std::cout << "Channel zero will be ignored, as this looks like a LOFAR data set with bad channel 0.\n";
	else
		std::cout << "Channel zero will be included in the statistics, as it seems that channel 0 is okay.\n";
	
	// Initialize statisticscollection
	statisticsCollection.SetPolarizationCount(polarizationCount);
	if(mode == CollectDefault)
	{
		for(unsigned b=0;b<bandCount;++b)
		{
			if(ignoreChannelZero)
				statisticsCollection.InitializeBand(b, (frequencies[b]+1), bands[b].channels.size()-1);
			else
				statisticsCollection.InitializeBand(b, frequencies[b], bands[b].channels.size());
		}
	}
	// Initialize Histograms collection
	histogramCollection.SetPolarizationCount(polarizationCount);

	// get columns
	casa::Table table(filename, casa::Table::Update);
	const char *dataColumnName = "DATA";
	casa::ROArrayColumn<casa::Complex> dataColumn(table, dataColumnName);
	casa::ROArrayColumn<bool> flagColumn(table, "FLAG");
	casa::ROScalarColumn<double> timeColumn(table, "TIME");
	casa::ROScalarColumn<int> antenna1Column(table, "ANTENNA1"); 
	casa::ROScalarColumn<int> antenna2Column(table, "ANTENNA2");
	casa::ROScalarColumn<int> windowColumn(table, "DATA_DESC_ID");
	
	std::cout << "Collecting statistics..." << std::endl;
	
	size_t channelCount = bands[0].channels.size();
	bool *correlatorFlags = new bool[channelCount];
	bool *correlatorFlagsForBadAntenna = new bool[channelCount];
	for(size_t ch=0; ch!=channelCount; ++ch)
	{
		correlatorFlags[ch] = false;
		correlatorFlagsForBadAntenna[ch] = true;
	}
	
	if(mwaChannels)
	{
		if(channelCount%24 != 0)
			std::cout << "MWA channels requested, but nr of channels not a multiply of 24. Ignoring.\n";
		else {
			size_t chanPerSb = channelCount/24;
			for(size_t x=0;x!=24;++x)
			{
				correlatorFlags[x*chanPerSb] = true;
				correlatorFlags[x*chanPerSb + chanPerSb/2] = true;
				correlatorFlags[x*chanPerSb + chanPerSb-1] = true;
			}
		}
	}
	
	const unsigned nrow = table.nrow();
	size_t timestepIndex = (size_t) -1;
	double prevtime = -1.0;
	for(unsigned row = 0; row!=nrow; ++row)
	{
		const double time = timeColumn(row);
		const unsigned antenna1Index = antenna1Column(row);
		const unsigned antenna2Index = antenna2Column(row);
		const unsigned bandIndex = windowColumn(row);
		
		if(time != prevtime)
		{
			++timestepIndex;
			prevtime = time;
		}
		
		const BandInfo &band = bands[bandIndex];
		
		const casa::Array<casa::Complex> dataArray = dataColumn(row);
		const casa::Array<bool> flagArray = flagColumn(row);
		
		std::vector<std::complex<float>* > samples(polarizationCount);
		bool **isRFI = new bool*[polarizationCount];
		for(unsigned p = 0; p < polarizationCount; ++p)
		{
			isRFI[p] = new bool[band.channels.size()];
			samples[p] = new std::complex<float>[band.channels.size()];
		}
		const bool antennaIsFlagged =
			flaggedAntennae.find(antenna1Index) != flaggedAntennae.end() ||
			flaggedAntennae.find(antenna2Index) != flaggedAntennae.end();
		
		casa::Array<casa::Complex>::const_iterator dataIter = dataArray.begin();
		casa::Array<bool>::const_iterator flagIter = flagArray.begin();
		const unsigned startChannel = ignoreChannelZero ? 1 : 0;
		if(ignoreChannelZero)
		{
			for(unsigned p = 0; p < polarizationCount; ++p)
			{
				++dataIter;
				++flagIter;
			}
		}
		for(unsigned channel = startChannel ; channel<band.channels.size(); ++channel)
		{
			for(unsigned p = 0; p < polarizationCount; ++p)
			{
				samples[p][channel - startChannel] = *dataIter;
				isRFI[p][channel - startChannel] = *flagIter;
				
				++dataIter;
				++flagIter;
			}
		}
		
		for(unsigned p = 0; p < polarizationCount; ++p)
		{
			switch(mode)
			{
				case CollectDefault:
					if(antennaIsFlagged || timestepIndex < flaggedTimesteps)
						statisticsCollection.Add(antenna1Index, antenna2Index, time, bandIndex, p, &samples[p]->real(), &samples[p]->imag(), isRFI[p], correlatorFlagsForBadAntenna, band.channels.size() - startChannel, 2, 1, 1);
					else
						statisticsCollection.Add(antenna1Index, antenna2Index, time, bandIndex, p, &samples[p]->real(), &samples[p]->imag(), isRFI[p], correlatorFlags, band.channels.size() - startChannel, 2, 1, 1);
					break;
				case CollectHistograms:
					histogramCollection.Add(antenna1Index, antenna2Index, p, samples[p], isRFI[p], band.channels.size() - startChannel);
					break;
			}
		}

		for(unsigned p = 0; p < polarizationCount; ++p)
		{
			delete[] isRFI[p];
			delete[] samples[p];
		}
		delete[] isRFI;
		
		reportProgress(row, nrow);
	}
	delete[] correlatorFlags;
	delete[] correlatorFlagsForBadAntenna;
	
	for(unsigned b=0;b<bandCount;++b)
		delete[] frequencies[b];
	delete[] frequencies;
	delete[] bands;
	std::cout << "100\n";
}
예제 #3
0
void TimeFrequencyImager::image(size_t antenna1Select, size_t antenna2Select, size_t spectralWindowSelect, size_t startIndex, size_t endIndex)
{
	size_t timeCount = _observationTimes.size();
	int frequencyCount = _measurementSet->FrequencyCount();

	initializePolarizations();
	checkPolarizations();

	if(_sortedTable == 0)
	{
		casa::Table *rawTable = _measurementSet->OpenTable();
		casa::Block<casa::String> names(4);
		names[0] = "DATA_DESC_ID";
		names[1] = "ANTENNA1";
		names[2] = "ANTENNA2";
		names[3] = "TIME";
		_sortedTable = new casa::Table(rawTable->sort(names));
		delete rawTable;
	}

	casa::Block<casa::String> selectionNames(3);
	selectionNames[0] = "DATA_DESC_ID";
	selectionNames[1] = "ANTENNA1";
	selectionNames[2] = "ANTENNA2";
	casa::TableIterator iter(*_sortedTable, selectionNames, casa::TableIterator::Ascending, casa::TableIterator::NoSort);
	while(!iter.pastEnd())
	{
		casa::Table table = iter.table();
		casa::ScalarColumn<int> antenna1(table, "ANTENNA1"); 
		casa::ScalarColumn<int> antenna2(table, "ANTENNA2");
		casa::ScalarColumn<int> windowColumn(table, "DATA_DESC_ID");
		if(table.nrow() > 0 && windowColumn(0) == (int) spectralWindowSelect && antenna1(0) == (int) antenna1Select && antenna2(0) == (int) antenna2Select)
		{
			break;
		} else {
			iter.next();
		}
	}
	if(iter.pastEnd())
	{
		throw std::runtime_error("Baseline not found");
	}

	casa::Table table = iter.table();

	if(startIndex > timeCount)
	{
		std::cerr << "Warning: startIndex > timeCount" << std::endl;
	}
	if(endIndex > timeCount)
	{
		endIndex = timeCount;
		std::cerr << "Warning: endIndex > timeCount" << std::endl;
	}

	size_t width = endIndex-startIndex;
	if(width == 0 || frequencyCount == 0)
		return;

	ClearImages();

	if(_readData) {
		if(_realXX==0 && _readXX)
		{
			_realXX = Image2D::CreateZeroImagePtr(width, frequencyCount);
			_imaginaryXX = Image2D::CreateZeroImagePtr(width, frequencyCount);
		}
		if(_realXY == 0 && _readXY)
		{
			_realXY = Image2D::CreateZeroImagePtr(width, frequencyCount);
			_imaginaryXY = Image2D::CreateZeroImagePtr(width, frequencyCount);
		}
		if(_realYX == 0 && _readYX)
		{
			_realYX = Image2D::CreateZeroImagePtr(width, frequencyCount);
			_imaginaryYX = Image2D::CreateZeroImagePtr(width, frequencyCount);
		}
		if(_realYY == 0 && _readYY)
		{
			_realYY = Image2D::CreateZeroImagePtr(width, frequencyCount);
			_imaginaryYY = Image2D::CreateZeroImagePtr(width, frequencyCount);
		}
		if(_realStokesI == 0 && _readStokesI)
		{
			_realStokesI = Image2D::CreateZeroImagePtr(width, frequencyCount);
			_imaginaryStokesI = Image2D::CreateZeroImagePtr(width, frequencyCount);
		}
	}
	if(_readFlags) {
		// The flags should be initialized to true, as this baseline might
		// miss some time scans that other baselines do have, and these
		// should be flagged.
		if(_flagXX==0 && _readXX)
			_flagXX = Mask2D::CreateSetMaskPtr<true>(width, frequencyCount);
		if(_flagXY==0 && _readXY)
			_flagXY = Mask2D::CreateSetMaskPtr<true>(width, frequencyCount);
		if(_flagYX==0 && _readYX)
			_flagYX = Mask2D::CreateSetMaskPtr<true>(width, frequencyCount);
		if(_flagYY==0 && _readYY)
			_flagYY = Mask2D::CreateSetMaskPtr<true>(width, frequencyCount);
		if(_flagCombined==0 && _readStokesI)
			_flagCombined = Mask2D::CreateSetMaskPtr<true>(width, frequencyCount);
	}
	_uvw.resize(width);

	casa::ScalarColumn<int> antenna1(table, "ANTENNA1"); 
	casa::ScalarColumn<int> antenna2(table, "ANTENNA2");
	casa::ScalarColumn<int> windowColumn(table, "DATA_DESC_ID");
	casa::ScalarColumn<double> timeColumn(table, "TIME");
	casa::ArrayColumn<float> weightColumn(table, "WEIGHT");
	casa::ArrayColumn<double> uvwColumn(table, "UVW");

	casa::ArrayColumn<casa::Complex> *dataColumn = 0;
	if(_readData)
		dataColumn = CreateDataColumn(_dataKind, table);

	ArrayColumnIterator<casa::Complex> *modelIter;
	if(_dataKind == ResidualData) {
		casa::ArrayColumn<casa::Complex> *modelColumn;
		modelColumn = new casa::ArrayColumn<casa::Complex>(table, "MODEL_DATA");
		modelIter = new ArrayColumnIterator<casa::Complex>(ArrayColumnIterator<casa::Complex>::First(*modelColumn));
	} else {
		modelIter = 0;
	}
	casa::ArrayColumn<bool> flagColumn(table, "FLAG");

	ScalarColumnIterator<int> antenna1Iter = ScalarColumnIterator<int>::First(antenna1);
	ScalarColumnIterator<int> antenna2Iter = ScalarColumnIterator<int>::First(antenna2);
	ScalarColumnIterator<int> windowIter = ScalarColumnIterator<int>::First(windowColumn);
	ScalarColumnIterator<double> timeIter = ScalarColumnIterator<double>::First(timeColumn);
	ArrayColumnIterator<double> uvwIter = ArrayColumnIterator<double>::First(uvwColumn);
	ArrayColumnIterator<float> weightIter = ArrayColumnIterator<float>::First(weightColumn);
	ArrayColumnIterator<casa::Complex> dataIter = 
		ArrayColumnIterator<casa::Complex>::First(*dataColumn);
	ArrayColumnIterator<bool> flagIter = 
		ArrayColumnIterator<bool>::First(flagColumn);

	for(size_t i=0;i<table.nrow();++i) {
		double time = *timeIter;
		size_t timeIndex = _observationTimes.find(time)->second;
		bool timeIsSelected = timeIndex>=startIndex && timeIndex<endIndex;
		if(_readData && timeIsSelected) {
			if(_dataKind == WeightData)
				ReadWeights(timeIndex-startIndex, frequencyCount, *weightIter);
			else if(modelIter == 0)
				ReadTimeData(timeIndex-startIndex, frequencyCount, *dataIter, 0);
			else {
				const casa::Array<casa::Complex> model = **modelIter; 
				ReadTimeData(timeIndex-startIndex, frequencyCount, *dataIter, &model);
			}
		}
		if(_readFlags && timeIsSelected) {
			const casa::Array<bool> flag = *flagIter;
			ReadTimeFlags(timeIndex-startIndex, frequencyCount, flag);
		}
		if(timeIsSelected) {
			casa::Array<double> arr = *uvwIter;
			casa::Array<double>::const_iterator i = arr.begin();
			_uvw[timeIndex-startIndex].u = *i;
			++i;
			_uvw[timeIndex-startIndex].v = *i;
			++i;
			_uvw[timeIndex-startIndex].w = *i;
		}

		if(_readData)
		{
			++dataIter;
			if(modelIter != 0)
				++(*modelIter);
		}
		if(_readFlags)
		{
			++flagIter;
		}

		++weightIter;
		++antenna1Iter;
		++antenna2Iter;
		++timeIter;
		++uvwIter;
		++windowIter;
	}
	if(dataColumn != 0)
		delete dataColumn;
}