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An image fusion algorithm, based on the Multiscale Kalman Filter (MKF), has been applied to combine remotely sensed data, acquired by radars having different resolutions and can improved information carried by each input image. The considered images have been acquired during the AIRSAR Mission and SIR-C/X-SAR Mission. The data have been co-registered to refer each pixel of each image to a common regular...
Multiple SAR images of the same area from slightly different slant angles show relative spectral shifts, which is used to improve the slant range resolution by combining their spectra. In the paper, an optimization modal, which maximizes the combined image's amplitude, is proposed to estimate the spectral shift. Simulated data show that the proposed estimation method is more precise than the interferometric...
This paper describes a method for the orthorectification of TerraSAR imagery. Being an effective earth observation technique, the synthetic aperture radar (SAR) systems supply extremely detailed radar images, day and night, under all weather conditions. EADS Astrium 's new radar satellite TerraSAR-X was launched in June 2007, which provides earth observation data of unprecedented quality, with a resolution...
This paper addresses the non-iterative quality phase gradient autofocus (QPGA) technique which was originally proposed to remove one-dimensional phase errors in spotlight-mode synthetic aperture radar (SAR) imagery. By enriching the source pool, the method is modified in a way suitable for autofocus in stripmap-mode SAR system with the advantage of being independent of any priori assumptions. Unlike...
In this work, a 2-D subaperture polar format algorithm (PFA) based on stepped-chirp signal is proposed. Instead of traditional pulse synthesis preprocessing, the presented method integrates the pulse synthesis process into the range subaperture processing. Meanwhile, due to the multi-resolution property of subaperture processing, this algorithm is able to compensate the space-variant phase error caused...
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