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		<doi>10.1109/JOE.2015.2424751</doi>
		<issn>0364-9059</issn>
		<citationkey>PaesNunzMigl:2016:CaHyFe</citationkey>
		<title>On the capability of hybrid-polarity features to observe metallic targets at sea</title>
		<year>2016</year>
		<month>Apr.</month>
		<typeofwork>journal article</typeofwork>
		<secondarytype>PRE PI</secondarytype>
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		<author>Paes, Rafael Lemos,</author>
		<author>Nunziata, Ferdinando,</author>
		<author>Migliaccio, Maurizio,</author>
		<group>SER-SRE-SPG-INPE-MCTI-GOV-BR</group>
		<affiliation>Instituto Nacional de Pesquisas Espaciais (INPE)</affiliation>
		<affiliation>Universitá degli Studi di Napoli Parthenope</affiliation>
		<affiliation>Universitá degli Studi di Napoli Parthenope</affiliation>
		<electronicmailaddress>rafael.paes.it@ieee.org</electronicmailaddress>
		<electronicmailaddress>nando.nunziata@uniparthenope.it</electronicmailaddress>
		<electronicmailaddress>maurizio.migliaccio@uniparthenope.it</electronicmailaddress>
		<journal>IEEE Journal of Oceanic Engineering</journal>
		<volume>41</volume>
		<number>2</number>
		<pages>346-361</pages>
		<transferableflag>1</transferableflag>
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		<keywords>Hybrid polarization, performance metrics, polarimetric synthetic aperture radar, remote sensing, sea surface, target detection, wave polarimetry.</keywords>
		<abstract>In this paper, target at sea detection is addressed using hybrid-polarity (HP) synthetic aperture radar (SAR) architecture. Wave polarimetry concepts are used to define HP features that are used to observe targets at sea. The sensitivity of HP features to both targets and the surrounding environment is analyzed through a novel objective norm, namely the Relative Sensitivity for Polarimetric Features (RSPolF) index. Detection performance is evaluated by the novel Dependency of Sea state and Target (DoST) surface characteristics metric, and by the well-known Figure of Merit (FoM). Experiments undertaken on HP measurements emulated from Radarsat-2 and ALOS-PALSAR full-polarimetric actual SAR data demonstrate the effectiveness of the proposed HP approach and the different sensitivity of HP features to targets and background sea characteristics. Following those results, a ranking of the HP features performance is proposed which mainly highlights that HP features complement each other in the detection process. Finally, a constant false alarm rate (CFAR) approach is proposed to exploit two HP features for target detection in an unsupervised way.</abstract>
		<area>SRE</area>
		<language>en</language>
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