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A sensitivity analysis of the standard deviation of the co-polarized phase difference for sea oil slick observation

Buono, Andrea and Nunziata, Ferdinando and de Macedo, Carina Regina and Velotto, Domenico and Migliaccio, Maurizio (2019) A sensitivity analysis of the standard deviation of the co-polarized phase difference for sea oil slick observation. IEEE Transactions on Geoscience and Remote Sensing, 57 (4), 2022 -2030. IEEE - Institute of Electrical and Electronics Engineers. DOI: 10.1109/TGRS.2018.2870738 ISBN 0196-2892 / Electronic ISSN: 1558-0644 ISSN 0196-2892

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Official URL: https://doi.org/10.1109/TGRS.2018.2870738

Abstract

In this paper, a time series of 33 TerraSAR-X copolarized synthetic aperture radar (SAR) imagery collected in Stripmap mode over the Gulf of Mexico in a wide range of incidence angles and sea-state condition is exploited, together with a theoretical framework based on the X-Bragg scattering model, to analyze the effects of noise, angle of incidence, (AOI) and wind speed on the standard deviation of the copolarized phase difference (σφc) evaluated over sea surface with and without oil slicks. This large data set represents an unprecedented opportunity to analyze, for the first time, the influence of both SAR acquisition and surface parameters on the broadening of the copolarized phase difference probability density function (pdf), pφc(φc). Experimental results show that the X-Bragg scattering model, here adopted to predict the sea surface pφc(φc), gives an understanding of the increasing trend of σφc with respect to AOI. It is shown that the noise significantly contributes to broaden pφc(φc) over both slick-free and slick-covered sea surface, while the effects of low-to-moderate wind regimes are negligible. In addition, σφc exhibits a larger sensitivity to the scene variability, if compared to single-polarization intensity channels, over both slick-free and oil-covered sea surface. This sensitivity is more pronounced at lower AOIs due to the higher noise equivalent sigma zero (NESZ) that affects larger AOIs.

Item URL in elib:https://elib.dlr.de/116319/
Document Type:Article
Additional Information:first published online: Oct. 10, 2018
Title:A sensitivity analysis of the standard deviation of the co-polarized phase difference for sea oil slick observation
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Buono, AndreaUniversità di Napoli Parthenope, Dipartimento di Ingegneria, 80143 Napoli, ItalyUNSPECIFIED
Nunziata, FerdinandoUniversità di Napoli Parthenope, Dipartimento di Ingegneria, 80143 Napoli, ItalyUNSPECIFIED
de Macedo, Carina ReginaUniversità di Napoli Parthenope, Dipartimento di Ingegneria, 80143 Napoli, ItalyUNSPECIFIED
Velotto, DomenicoDomenico.Velotto (at) dlr.dehttps://orcid.org/0000-0002-8592-0652
Migliaccio, Mauriziomaurizio.migliaccio (at) uniparthenope.itUNSPECIFIED
Date:April 2019
Journal or Publication Title:IEEE Transactions on Geoscience and Remote Sensing
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:57
DOI :10.1109/TGRS.2018.2870738
Page Range:2022 -2030
Editors:
EditorsEmail
UNSPECIFIEDIEEE
Publisher:IEEE - Institute of Electrical and Electronics Engineers
ISSN:0196-2892
ISBN:0196-2892 / Electronic ISSN: 1558-0644
Status:Published
Keywords:multi-polarization, backscattering, oil seepages, TerraSAR-X, time series, polarimetry, SAR, Oceanography
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - SAR-Methodology
Location: Bremen , Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > SAR Signal Processing
Deposited By: Kaps, Ruth
Deposited On:22 Nov 2018 10:56
Last Modified:31 Jul 2019 20:13

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