Abstract: A computer-implemented method and system for detecting and suppressing azimuth ambiguities in synthetic aperture radar “SAR” single look complex image data includes obtaining SAR single look complex image data; transforming the SAR single look complex image data to obtain a Doppler spectrum in the frequency domain spectrum for detecting azimuth ambiguities by performing a Fourier transform operation in the azimuth direction on the image data. The method also includes extracting phase information from the Doppler spectrum; detecting, in the Doppler spectrum, one or more azimuth ambiguities; and suppressing the one or more azimuth ambiguities to obtain corrected data. The method also includes applying an ambiguity suppression machine learning model and reinstating the phase information after suppressing the azimuth ambiguities such that the phase information of the Doppler spectrum is conserved.

Abstract: A method of detecting and suppressing azimuth ambiguities in synthetic aperture radar (SAR) single look complex (SLC) image data (SAR SLC image data) comprising a Doppler spectrum obtained from received SAR signals by applying an amplitude threshold to the Doppler spectrum of received SAR signals to exclude amplitude values above the amplitude threshold resulting from ambiguous energy in the Doppler spectrum, and substituting the excluded amplitude values using a fitting function to generate a modified Doppler spectrum with the ambiguous energy suppressed; and generating azimuth ambiguity suppressed image data using the modified Doppler spectrum.

Abstract: A method of method of detecting ambiguities in synthetic aperture radar (SAR) image data is performed on SAR data comprising, for each pixel in an image, an amplitude and a phase value. The method comprises: calculating at least one phase derivative value for respective pixels represented by the SAR data with respect to a spatial direction, determining a threshold for the phase derivative value, and determining pixels with phase derivative values above the threshold to be ambiguous. A method of suppressing azimuth ambiguities in synthetic aperture radar “SAR” single look complex image data, is performed on a Doppler spectrum obtained from received SAR signals.

Abstract: A method of method of detecting ambiguities in synthetic aperture radar (SAR) image data is performed on SAR data comprising, for each pixel in an image, an amplitude and a phase value. The method comprises: calculating at least one phase derivative value for respective pixels represented by the SAR data with respect to a spatial direction, determining a threshold for the phase derivative value, and determining pixels with phase derivative values above the threshold to be ambiguous. A method of suppressing azimuth ambiguities in synthetic aperture radar “SAR” single look complex image data, is performed on a Doppler spectrum obtained from received SAR signals.