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The consequences of sampling variability on the estimation of wave number and propagation direction from spaceborne SAR image spectra

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1 Author(s)
Monaldo, F.M. ; Appl. Phys. Lab., Johns Hopkins Univ., Laurel, MD, USA

Even if it were true that SAR (synthetic aperture radar) ocean surface imagery provides a perfect noiseless representation of ocean surface wave height, each spectrum computed from such imagery would be but a single realization of the ensemble-mean ocean spectrum. There would be sampling variability associated with the parameters of dominant wave number and propagation direction extracted from such a spectrum. The present study addresses two questions: (i) what statistical distribution is applicable to the spectra of SAR ocean images? and (ii) what are the consequences of such statistics on the precision with which wave number and propagation direction can be extracted? An examination is made of spectra computed from ocean imagery acquired during the SIR-B (Shuttle Imaging Radar-B) mission

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Geoscience and Remote Sensing, IEEE Transactions on  (Volume:29 ,  Issue: 1 )