THE EFFECT OF RANGE-TO-VELOCITY RATIO ON SIMULATED SAR IMAGES OF OCEAN WIND-WAVES

Authors
Citation
Jc. West, THE EFFECT OF RANGE-TO-VELOCITY RATIO ON SIMULATED SAR IMAGES OF OCEAN WIND-WAVES, IEEE transactions on geoscience and remote sensing, 31(1), 1993, pp. 299-303
Citations number
14
Categorie Soggetti
Engineering, Eletrical & Electronic","Geosciences, Interdisciplinary
ISSN journal
01962892
Volume
31
Issue
1
Year of publication
1993
Pages
299 - 303
Database
ISI
SICI code
0196-2892(1993)31:1<299:TEORRO>2.0.ZU;2-T
Abstract
Synthetic-aperture-radar (SAR) imaging of locally wind-generated ocean waves is simulated using the subwindowing technique. Several SAR rang e-to-velocity ratios (R/V) are used. Coherence is maintained throughou t the imaging process, so the final image spectra include the noise re sulting from phase-interference fading. Maximum spectral signal-to-noi se ratio (SNR) is achieved with an R/V that maximizes velocity bunchin g modulation through imaging nonlinearities. Although the azimuthal sh ift of the spectral peak can be lessened by utilizing a lower R/V, the maximum wave number at which the signal exceeds the spectral noise do es not change significantly, and the resulting decrease in overall S/N would likely make spectral extraction more difficult.