Show simple item record

dc.contributor.authorFernandes, A.A.
dc.contributor.authorSarma, Y.V.B.
dc.contributor.authorMenon, H.B.
dc.contributor.authorVethamony, P.
dc.date.accessioned2009-01-09T09:17:59Z
dc.date.available2009-01-09T09:17:59Z
dc.date.issued2000
dc.identifier.citationPhotonirvachak, Vol.28; 9-18p.
dc.identifier.urihttp://drs.nio.org/drs/handle/2264/1701
dc.description.abstractGaussian smoothed SAR image spectra have been evaluated from 512 x 512 pixel subscenes of image mode ERS-1 SAR scenes off Goa, Visakhapatnam, Paradeep and Portugal. The two recently acquired scenes off Portugal showed the signature of swell of wavelength approx. equal to 200 m and internal waves of wavelength greater than 400 m. Only internal waves of wavelength greater than 400 m were seen in the scene off Goa observed on 11 March 1992. The scenes off Visakhapatnam and Paradeep did not show any wave like features, the latter appearing to be of "white noise" nature. There exists a 180 degrees ambiguity in wave direction observed from radar imageries. Based on the method of Atanassov et al (1985), a computer program has been developed for the removal of the 180 degrees ambiguity by using two images of the same area separated by a time interval which is small compared to the period of the dominant waves. The computer program has been successfully tested with computer simulated images.
dc.language.isoen
dc.publisherIndian Society of Remote Sensing, Deharadun
dc.rightsCopyright [2000]. All efforts have been made to respect the copyright to the best of our knowledge. Inadvertent omissions, if brought to our notice, stand for correction and withdrawal of document from this repository.
dc.subjectsurface water waves
dc.subjectwave spectra
dc.subjectwavelength
dc.subjectsynthetic aperture radar
dc.subjectwave direction
dc.subjectdirectional spectra
dc.subjectremote sensing
dc.titleWave directional spectrum from SAR imagery
dc.typeJournal Article


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record