Intereferogram generation by cross-multiplication of reference and secondary SLCs. More...

#include <Crossmul.h>

Public Member Functions
void	crossmul (isce3::io::Raster &referenceSLC, isce3::io::Raster &secondarySLC, isce3::io::Raster &rngOffset, isce3::io::Raster &interferogram, isce3::io::Raster &coherence)
	Run crossmul. More...

void	crossmul (isce3::io::Raster &referenceSLC, isce3::io::Raster &secondarySLC, isce3::io::Raster &interferogram, isce3::io::Raster &coherence)
	Run crossmul. More...

void	crossmul (isce3::io::Raster &referenceSLC, isce3::io::Raster &secondarySLC, isce3::io::Raster &interferogram)
	Run crossmul. More...

void	lookdownShiftImpact (size_t oversample, size_t fft_size, size_t blockRows, std::valarray< std::complex< float >> &shiftImpact)
	Compute the frequency response due to a subpixel shift introduced by upsampling and downsampling. More...

void	rangeCommonBandFilter (std::valarray< std::complex< float >> &refSlc, std::valarray< std::complex< float >> &secSlc, std::valarray< std::complex< float >> geometryIfgram, std::valarray< std::complex< float >> geometryIfgramConj, std::valarray< std::complex< float >> &refSpectrum, std::valarray< std::complex< float >> &secSpectrum, std::valarray< double > &rangeFrequencies, isce3::signal::Filter< float > &rngFilter, size_t blockRows, size_t ncols)
	Range common band filtering. More...

void	doppler (isce3::core::LUT1d< double >, isce3::core::LUT1d< double >)
	Set doppler LUTs for reference and secondary SLCs. More...

void	prf (double)
	Set pulse repetition frequency (PRF) More...

void	rangeSamplingFrequency (double)
	Set range sampling frequency. More...

void	rangeBandwidth (double)
	Set the range bandwidth. More...

void	rangePixelSpacing (double)
	Range pixel spacing. More...

void	wavelength (double)
	Set Wavelength. More...

void	commonAzimuthBandwidth (double)
	Set azimuth common bandwidth. More...

void	beta (double)
	Set beta parameter for the azimuth common band filter. More...

void	rangeLooks (int)
	Set number of range looks. More...

void	azimuthLooks (int)
	Set number of azimuth looks. More...

void	doCommonAzimuthbandFiltering (bool)
	Set common azimuth band filtering flag. More...

void	doCommonRangebandFiltering (bool)
	Set common range band filtering flag. More...

void	rangeFrequencyShift (std::valarray< std::complex< float >> &refAvgSpectrum, std::valarray< std::complex< float >> &secAvgSpectrum, std::valarray< double > &rangeFrequencies, size_t blockRowsData, size_t fft_size, double &frequencyShift)
	Compute the avergae frequency shift in range direction between two SLCs. More...

void	getPeakIndex (std::valarray< float > data, size_t &peakIndex)
	estimate the index of the maximum of a vector of data More...

Detailed Description

Intereferogram generation by cross-multiplication of reference and secondary SLCs.

The secondary SLC must be on the same image grid as the reference SLC,

Member Function Documentation

void isce3::signal::Crossmul::azimuthLooks ( int azimuthLooks )

inline

Set number of azimuth looks.

Parameters

[in] azimuthLooks number of looks in azimuth direction

void isce3::signal::Crossmul::beta ( double par )

inline

Set beta parameter for the azimuth common band filter.

Parameters

[in] beta parameter for the azimuth common band filter design

void isce3::signal::Crossmul::commonAzimuthBandwidth ( double commonAzimuthBandwidth )

inline

Set azimuth common bandwidth.

Parameters

[in] commonAzimuthBandwidth common azimuth bandwidth

void isce3::signal::Crossmul::crossmul	(	isce3::io::Raster &	referenceSLC,
		isce3::io::Raster &	secondarySLC,
		isce3::io::Raster &	rngOffsetRaster,
		isce3::io::Raster &	interferogram,
		isce3::io::Raster &	coherenceRaster
	)

Run crossmul.

Parameters

[in]	referenceSLC	Raster object of reference SLC
[in]	secondarySLC	Raster object of secondary SLC
[in]	rngOffsetRaster	Raster object of range offsets between reference and secondary SLCs
[out]	interferogram	Raster object of output interferogram
[out]	coherence	Raster object of output coherence

void isce3::signal::Crossmul::crossmul	(	isce3::io::Raster &	referenceSLC,
		isce3::io::Raster &	secondarySLC,
		isce3::io::Raster &	interferogram,
		isce3::io::Raster &	coherence
	)

Run crossmul.

Parameters

[in]	referenceSLC	Raster object of reference SLC
[in]	secondarySLC	Raster object of secondary SLC
[out]	interferogram	Raster object of output interferogram
[out]	coherence	Raster object of output coherence

void isce3::signal::Crossmul::crossmul	(	isce3::io::Raster &	referenceSLC,
		isce3::io::Raster &	secondarySLC,
		isce3::io::Raster &	interferogram
	)

Run crossmul.

Parameters

[in]	referenceSLC	Raster object of reference SLC
[in]	secondarySLC	Raster object of secondary SLC
[out]	interferogram	Raster object of output interferogram

void isce3::signal::Crossmul::doCommonAzimuthbandFiltering ( bool flag )

inline

Set common azimuth band filtering flag.

Parameters

[in] flag to mark if common azimuth band filtering should be applied

void isce3::signal::Crossmul::doCommonRangebandFiltering ( bool flag )

inline

Set common range band filtering flag.

Parameters

[in] flag to mark if common range band filtering should be applied

void isce3::signal::Crossmul::doppler	(	isce3::core::LUT1d< double >	refSlcDoppler,
		isce3::core::LUT1d< double >	secSlcDoppler
	)

inline

Set doppler LUTs for reference and secondary SLCs.

Parameters

[in]	refSlcDoppler	2D Doppler polynomial for refernce SLC
[in]	secSlcDoppler	2D Doppler polynomial for secondary SLC

void isce3::signal::Crossmul::getPeakIndex	(	std::valarray< float >	data,
		size_t &	peakIndex
	)

inline

estimate the index of the maximum of a vector of data

Parameters

[in]	data	a vector to be evaluated for the index of its maximum
[out]	peakIndex	index of the maximum value in data

void isce3::signal::Crossmul::lookdownShiftImpact	(	size_t	oversample,
		size_t	fft_size,
		size_t	blockRows,
		std::valarray< std::complex< float >> &	shiftImpact
	)

Compute the frequency response due to a subpixel shift introduced by upsampling and downsampling.

Parameters

[in]	oversample	upsampling factor
[in]	fft_size	fft length in range direction
[in]	blockRows	number of rows of the block of data
[out]	shiftImpact	frequency responce (a linear phase) to a sub-pixel shift in time domain introduced by upsampling followed by downsampling

void isce3::signal::Crossmul::prf ( double prf )

inline

Set pulse repetition frequency (PRF)

Parameters

[in] prf pulse repetition interval

void isce3::signal::Crossmul::rangeBandwidth ( double rngBandwidth )

inline

Set the range bandwidth.

Parameters

[in] rngBandwidth range bandwidth

void isce3::signal::Crossmul::rangeCommonBandFilter	(	std::valarray< std::complex< float >> &	refSlc,
		std::valarray< std::complex< float >> &	secSlc,
		std::valarray< std::complex< float >>	geometryIfgram,
		std::valarray< std::complex< float >>	geometryIfgramConj,
		std::valarray< std::complex< float >> &	refSpectrum,
		std::valarray< std::complex< float >> &	secSpectrum,
		std::valarray< double > &	rangeFrequencies,
		isce3::signal::Filter< float > &	rngFilter,
		size_t	blockLength,
		size_t	ncols
	)

Range common band filtering.

Parameters

[in]	refSlc	a block of the reference SLC to be filtered
[in]	secSlc	a block of second SLC to be filtered
[in]	geometryIfgram	a simulated interferogram that contains the geometrical phase due to baseline separation
[in]	geometryIfgramConj	conjugate of geometryIfgram
[in]	refSpectrum	spectrum of geometryIfgramConj in range direction
[in]	secSpectrum	spectrum of geometryIfgram in range direction
[in]	rangeFrequencies	frequencies in range direction
[in]	rngFilter	a filter object
[in]	blockLength	number of rows
[in]	ncols	number of columns

void isce3::signal::Crossmul::rangeFrequencyShift	(	std::valarray< std::complex< float >> &	refSpectrum,
		std::valarray< std::complex< float >> &	secSpectrum,
		std::valarray< double > &	rangeFrequencies,
		size_t	blockRowsData,
		size_t	fft_size,
		double &	frequencyShift
	)

inline

Compute the avergae frequency shift in range direction between two SLCs.

@param[in] refSpectrum the spectrum of a block of a complex data

Parameters

[in]	secSpectrum	the spectrum of a block of complex data
[in]	rangeFrequencies	the frequencies in range direction
[in]	blockRowsData	number of rows in refSpectrum and secSpectrum
[in]	fft_size	number of columns in refSpectrum and secSpectrum
[out]	estimated	frequency shift between refSpectrum and secSpectrum

void isce3::signal::Crossmul::rangeLooks ( int rangeLooks )

inline

Set number of range looks.

Parameters

[in] rangeLooks number of looks in range direction

void isce3::signal::Crossmul::rangePixelSpacing ( double rngPixelSpacing )

inline

Range pixel spacing.

Parameters

[in] rngPixelSpacing range pixel spacing

void isce3::signal::Crossmul::rangeSamplingFrequency ( double rngSamplingFreq )

inline

Set range sampling frequency.

Parameters

[in] rngSamplingFreq range sampling frequency

void isce3::signal::Crossmul::wavelength ( double wvl )

inline

Set Wavelength.

Parameters

[in] wvl radar wavelength

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

isce/cxx/isce3/signal/Crossmul.h
isce/cxx/isce3/signal/Crossmul.cpp
isce/cxx/isce3/signal/Crossmul.icc

Public Member Functions

Detailed Description

Member Function Documentation