Abstract
An innovative data-based motion compensation approach is proposed for the high- resolution synthetic aperture radar (SAR). The main idea is to extract the displacements in line-of-sight direction and the range-dependent phase errors from raw data, based on an instanta- neous Doppler rate estimate. The approach is implemented by a two-step process: (1) the correction of excessive range cell migration; (2) the compensation of range-dependent phase errors. Experimental results show that the proposed method is capable of producing high-res- olution SAR imagery with a spatial resolution of 0.17 × 0.2 m 2 (range× azimuth )i n Ku band. © 2014 Society of Photo-Optical Instrumentation Engineers (SPIE) (DOI: 10.1117/1.JRS.8.083664)
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