Show simple item record

dc.contributor.authorZygmuntowska, Martaeng
dc.contributor.authorKhvorostovsky, Kirilleng
dc.contributor.authorHelm, Veitheng
dc.contributor.authorSandven, Steineng
dc.description.abstractSea ice thickness is one of the most sensitive variables in the Arctic climate system. In order to quantify changes in sea ice thickness, CryoSat-2 was launched in 2010 carrying a Ku-band radar altimeter (SIRAL) designed to measure sea ice freeboard with a few centimeters accuracy. The instrument uses the synthetic aperture radar technique providing signals with a resolution of about 300m along track. In this study, airborne Ku-band radar altimeter data over different sea ice types have been analyzed. A set of parameters has been defined to characterize the differences in strength and width of the returned power waveforms. With a Bayesian-based method, it is possible to classify about 80% of the waveforms from three parameters: maximum of the returned power waveform, the trailing edge width and pulse peakiness. Furthermore, the maximum of the power waveform can be used to reduce the number of false detections of leads, compared to the widely used pulse peakiness parameter. For the pulse peakiness the false classification rate is 12.6% while for the power maximum it is reduced to 6.5 %. The ability to distinguish between different ice types and leads allows us to improve the freeboard retrieval and the conversion from freeboard into sea ice thickness, where surface type dependent values for the sea ice density and snow load can be used.en_US
dc.publisherCopernicus Publications on behalf of the European Geosciences Unionen_US
dc.relation.ispartof<a href="" target="blank">Arctic sea ice altimetry - advances and current uncertainties</a>en_US
dc.rightsAttribution CC BYeng
dc.titleWaveform classification of airborne synthetic aperture radar altimeter over Arctic sea iceen_US
dc.typePeer reviewed
dc.typeJournal article
dc.rights.holderCopyright Author(s) 2013en_US
dc.source.journalThe Cryosphere

Files in this item


This item appears in the following Collection(s)

Show simple item record

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