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Azimuth Ambiguities Removal for Ship Detection Using Full Polarimetric X-Band SAR Data

Velotto, Domenico and Soccorsi, Matteo and Lehner, Susanne (2014) Azimuth Ambiguities Removal for Ship Detection Using Full Polarimetric X-Band SAR Data. IEEE Transactions on Geoscience and Remote Sensing, 52 (1), pp. 76-88. IEEE - Institute of Electrical and Electronics Engineers. doi: 10.1109/TGRS.2012.2236337. ISSN 0196-2892.

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Official URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=06428670


Synthetic aperture radar (SAR) ship detection is an important application in the field of maritime security. Azimuth ambiguities caused by the aliasing of the Doppler phase history of each point are often visible in SAR images particularly in ocean areas of low wind speed condition, e.g., in coastal areas, in harbors, etc. The main sources of azimuth ambiguities are man-made metallic structures over the ocean, e.g., ships, oil platforms etc., and over land near the coast, e.g., big tanks, bridges’ pylons etc., that have a high SAR backscatter responses. Although the ambiguities’ backscatter is generally low, in many situations, it is above the surrounding ocean clutter and are mistaken by classic detection techniques, like constant false alarm rate, as real targets causing false positives. This paper addresses both the discrimination of real targets from non-trivial false positives, namely those due to azimuth ambiguities and the detection itself using a Generalized-K distribution approach. The methodology is firstly proposed and demonstrated over a significant data set of full polarimetric X-band SAR data, which have been acquired by the German satellite TerraSAR-X during the experimental dual receive antenna campaign in April and May 2010. It is based on the intrinsic configuration of monostatic two-channel PolSAR systems and relies on the different signature of azimuth ambiguities in cross-polarized channels. Automatic Identification System messages collected and collocated with the data set analyzed are used as ground truth to evaluate and validate the proposed methodology.

Item URL in elib:https://elib.dlr.de/82158/
Document Type:Article
Title:Azimuth Ambiguities Removal for Ship Detection Using Full Polarimetric X-Band SAR Data
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Velotto, Domenicodomenico.velotto (at) dlr.deUNSPECIFIED
Soccorsi, MatteoThales Alenia Space, ItalyUNSPECIFIED
Lehner, SusanneSusanne.Lehner (at) dlr.deUNSPECIFIED
Journal or Publication Title:IEEE Transactions on Geoscience and Remote Sensing
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1109/TGRS.2012.2236337
Page Range:pp. 76-88
EditorsEmailEditor's ORCID iD
Ruf, ChristopherUniversity of Michigan, USAUNSPECIFIED
Publisher:IEEE - Institute of Electrical and Electronics Engineers
Keywords:Azimuth ambiguity, dual receive antenna, PolSAR, ship detection, TerraSAR-X
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - Vorhaben hochauflösende Fernerkundungsverfahren (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > SAR Signal Processing
Deposited On:24 Jun 2013 09:57
Last Modified:08 Mar 2018 18:34

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