Motion error correction of range migration algorithm for aircraft spotlight SAR imaging

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Motion error correction of range migration algorithm for aircraft spotlight SAR imaging

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Since a motion error is the main phase error source in the aircraft synthetic aperture radar, several reconstruction algorithms with motion error correction have been developed. An efficient motion compensation via the known motion error information is proposed. Specifically, the proposed method is based on the subarea technique with shifting and the subaperture technique via the mean values of the motion errors. Then, using the extended Taylor approximation and the principle of the stationary phase, the motion errors are corrected through compensation at the mixing stage and the Stolt interpolation stage.

Inspec keywords: motion compensation; synthetic aperture radar; radar imaging; error correction; aircraft; interpolation; approximation theory

Other keywords: aircraft synthetic aperture radar; subaperture technique; range migration algorithm; aircraft spotlight SAR imaging; motion compensation; mean values; subarea technique; Taylor approximation; phase error source; motion error correction; Stolt interpolation

Subjects: Radar equipment, systems and applications; Optical, image and video signal processing; Interpolation and function approximation (numerical analysis)

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