Retrieval of Spherical Ocean Wave Parameters Using RADARSAT-2 SAR Sensor Observed at Chukk, Micronesia KCI

DC Field Value Language
dc.contributor.author Sudhir Kum -
dc.contributor.author 양찬수 -
dc.contributor.author 송정환 -
dc.contributor.author Kazuo Ouchi -
dc.contributor.author P. Shanmugam -
dc.date.accessioned 2020-04-20T07:43:49Z -
dc.date.available 2020-04-20T07:43:49Z -
dc.date.created 2020-02-10 -
dc.date.issued 2011-06 -
dc.identifier.issn 1225-6161 -
dc.identifier.uri https://sciwatch.kiost.ac.kr/handle/2020.kiost/3859 -
dc.description.abstract The purpose of this study is to estimate the spherical wave parameters that appears in synthetic aperture radar (SAR) image acquired over the coast of Chukk, Micronesia. The retrieval of ocean wave parameters consists of two main stages: the first is to determine the dominant wavelengths by Fast Fourier Transform (FFT) over 16 sub-image areas and the second is to estimate wave slopes and heights using dispersion relationship under various water wave conditions. It is assumed that the spherical waves are linear and progressive. These type of waves have the range and azimuth components traveling in radial directions. The azimuth travelling waves are more affected by the velocity bunching mechanism and it is difficult to estimate the wave parameters for these affected areas in SAR imagery. In order to compensate these effects, the velocity bunching ratio (VBR) based on modulation transfer function (MTF) was compared with the intensity ratio for neighbor area in the radial direction in order to assign the spherical wave properties for azimuthally travelling waves. Dispersion relation provides the good estimates for the wave heights for all the selected sub-image areas in the range of 1m to 2m. VBR based on MTF was found to be 0.78 at wave height of 1.36m, while the intensity-based VBR was 0.69 which corresponds to the height of 1.75m. It can be said that the velocity bunching accounts for azimuthally travelling spherical waves and the difference results from the sea-bottom effects. -
dc.description.uri 2 -
dc.language English -
dc.publisher 대한원격탐사학회 -
dc.title Retrieval of Spherical Ocean Wave Parameters Using RADARSAT-2 SAR Sensor Observed at Chukk, Micronesia -
dc.type Article -
dc.citation.endPage 223 -
dc.citation.startPage 213 -
dc.citation.title 대한원격탐사학회지 -
dc.citation.volume 27 -
dc.citation.number 3 -
dc.contributor.alternativeName Sudhir Kum -
dc.contributor.alternativeName 양찬수 -
dc.contributor.alternativeName 송정환 -
dc.identifier.bibliographicCitation 대한원격탐사학회지, v.27, no.3, pp.213 - 223 -
dc.identifier.kciid ART001569898 -
dc.description.journalClass 2 -
dc.description.isOpenAccess N -
dc.subject.keywordAuthor Spherical waves -
dc.subject.keywordAuthor Wave parameters -
dc.subject.keywordAuthor FFT -
dc.subject.keywordAuthor SAR_ocean imaging -
dc.subject.keywordAuthor Dispersion relation -
dc.subject.keywordAuthor Velocity bunching -
dc.description.journalRegisteredClass kci -
Appears in Collections:
Sea Power Enhancement Research Division > Marine Domain & Security Research Department > 1. Journal Articles
Files in This Item:
There are no files associated with this item.

qrcode

Items in ScienceWatch@KIOST are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse