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For the high-precision and long-aperture SAR, range shift errors are introduced by the residual errors after aperture-independent motion compensation, as well as the azimuth phase errors. Both the frequency domain methods and the time domain algorithms exist shortcoming when dealing with the problem, i.e. inaccuracy and huge computation, respectively. Limitations of these algorithms has been analyzed...
Low-frequency airborne repeat-pass interferometric synthetic aperture radar (InSAR) system has the characteristics of large azimuth-variant motion errors, low coherence, etc., leading to incapability of some of the algorithms which exhibit well in the narrow-beam systems. This paper proposed a strategy for P-band airborne repeat-pass InSAR system to obtain high-precision digital terrain model (DTM)...
Multi-channel Synthetic Aperture Radar (SAR) in azimuth, which can be utilized to suppress the Doppler ambiguity to achieve the High-Resolution Wide-Swath (HRWS) SAR images, suffers from the amplitude and phase mismatch among the channels. This paper presents a novel data-based phase bias estimation method in time-domain. Firstly, the echoes in time-domain received by the adjacent channels are processed...
This paper deals with the azimuth resolution improvement problems via the coherent combination of the SAR images with nearly zero-overlapped Doppler bandwidth, which corresponding to large along-track baseline. Prior to the combination of the images, the phase bias contributions from the atmospheric propagation delays and baseline measurement errors should be calibrated. The interferogram of the azimuth...
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