Focusing effects in the synthetic aperture radar imaging of ocean waves

Details Focusing effects in the synthetic aperture radar imaging of ocean waves Focusing effects in the synthetic aperture radar imaging of ocean waves

Mar 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apphy..15..323j&link_type=abstract

Applied Physics, vol. 15, Mar. 1978, p. 323-333.

Physics

10

Focusing, Ocean Surface, Radar Imagery, Water Waves, Hurricanes, Optical Transfer Function, Scattering Cross Sections

Scientific paper

The paper derives the properties of the image obtained for an ocean wave whose cross section and surface profile are functions, representing the wave phenomena, whose exact properties are determined by the ocean wave surface properties, for ocean wavelength, height, and orbital frequency. The effect of defocusing of the wave image due to its temporal motion is calculated, and both the resolution of the radar system if no focus compensation is provided in the processor and the necessary distance the azimuth telescope has to be moved to provide diffraction-limited imaging are derived. These results are illustrated for data obtained by synthetic aperture radar during Hurricane Gloria on September 30, 1976, and by ERIM radar over Marineland, Florida, on December 15, 1975.

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