Computer Science
Scientific paper
Oct 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980nasa.reptx....c&link_type=abstract
Patent National Aeronautics and Space Administration. Pasadena Office, CA.
Computer Science
Doppler Effect, Image Correlators, Servomechanisms, Synthetic Aperture Radar, Fourier Transformation, Luminous Intensity, Normal Density Functions, Patents, Photodiodes
Scientific paper
A method and apparatus for correcting Doppler shifts in synthetic aperture radar data is described. An optical correlator for synthetic aperture radar data has a means for directing a laser beam at a signal film having radar return pulse intensity information recorded on it. A resultant laser beam passes through a range telescope, an azimuth telescope, and a Fourier transform filter located between the range and azimuth telescopes, and forms an image for recording on an image film. A compensation means for Doppler shift in the radar return pulse intensity information includes a beam splitter for reflecting the modulated laser beam, after having passed through the Fourier transform filter, to a detection screen having two photodiodes mounted on it.
Bicknell T. J.
Constaninides N. J.
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