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dc.contributor.authorQuigley, Cornelius Patrick
dc.contributor.authorJohansson, Malin
dc.contributor.authorJones, Cathleen Elaine
dc.date.accessioned2023-06-15T08:34:45Z
dc.date.available2023-06-15T08:34:45Z
dc.date.issued2023-06-12
dc.description.abstractThe damping ratio has recently been used to indicate the relative internal oil thickness within oil slicks observed in synthetic aperture radar (SAR) imagery. However, there exists no well-defined and evaluated methodology for calculating the damping ratio. In this study, we review prior work regarding the damping ratio and outline its theoretical and practical aspects. We show that the most often used methodology yields damping ratio values that differ, in some cases significantly, for the same scene. Three alternative methods are tested on multi-frequency data sets of verified oil slicks acquired from DLR's F-SAR instrument, NASA's Unmanned Aerial Vehicle Synthetic Aperture Radar (UAVSAR) and Sentinel-1. All methods yielded similar results regarding relative thickness variations within slick. The proposed damping ratio derivation methods were found to be sensitive to the proportion of oil covered pixels versus open water pixels in the azimuth direction, as well as to the scene size in question. We show that the fully automatable histogram method provides the most consistent results even under challenging conditions. Comparisons between optical imagery and derived damping ratio values using F-SAR data show good agreement between the relatively thicker oil slick areas for the two different types of sensors.en_US
dc.identifier.citationQuigley, Johansson, Jones. An investigation on the damping ratio of marine oil slicks in synthetic aperture radar imagery. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing. 2023en_US
dc.identifier.cristinIDFRIDAID 2153786
dc.identifier.doi10.1109/JSTARS.2023.3285145
dc.identifier.issn1939-1404
dc.identifier.issn2151-1535
dc.identifier.urihttps://hdl.handle.net/10037/29407
dc.language.isoengen_US
dc.publisherIEEEen_US
dc.relation.journalIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
dc.relation.projectIDNorges forskningsråd: 237906en_US
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2023 The Author(s)en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0en_US
dc.rightsAttribution 4.0 International (CC BY 4.0)en_US
dc.titleAn investigation on the damping ratio of marine oil slicks in synthetic aperture radar imageryen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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Attribution 4.0 International (CC BY 4.0)
Except where otherwise noted, this item's license is described as Attribution 4.0 International (CC BY 4.0)