Ocean waves and optimal SAR processing: don't adjust the focus

Concepts for the optimal processing of synthetic-aperture radar (SAR) ocean wave observations are discussed. The recommended procedure requires processing of the SAR signal data to individual looks. The Fourier transform of each look is then calculated and phase compensated, than all are combined. The method leads to an optimized wave spectral estimation for SAR data. It is emphasized that these concepts support the conclusion that the SAR processor focus setting should be equal to that for a static scene. Focus adjustment away from this value leads to results that are less than optimal.<
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