Squint mode SAR imaging with range-walk removal

A new point of view is proposed to correct range migration and focus highly squinted SAR data. The procedure of range-migration correction is done not only in the range-Doppler (R-D) domain and the 2D frequency domain as usual, but also in the time domain. A modified chirp scaling (CS) algorithm is described, based on the new point. A quantitative analysis and simulations show that the new algorithm can process SAR data with a squint angle as large as 70/spl deg/ and a range swath of 50 km or wider.

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