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Iceberg Detection over Northern Latitudes Using High Resolution TerraSAR-X Images

Frost, Anja and Ressel, Rudolf and Lehner, Susanne (2015) Iceberg Detection over Northern Latitudes Using High Resolution TerraSAR-X Images. In: 36th Canadian Symposium of Remote Sensing - Abstracts. 36th Canadian Symposium of Remote Sensing, 8.-11. June 2015, ST. JOHN’S, NEWFOUNDLAND AND LABRADOR, CANADA.

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Official URL: http://www.crss-sct.ca/conferences/csrs2015/


Over northern latitudes, icebergs frequently cross shipping routes and impair marine traffic. To improve ship routing, we propose a novel algorithm that is intended to detect and chart icebergs from Synthetic Aperture Radar (SAR) images provided by the German satellite TerraSAR-X. TerraSAR-X is in a near-polar orbit and fully operational since January 2008. Equipped with an active X-band antenna, it is able to monitor the ocean and frozen waters regardless of cloud cover and darkness, providing a resolution of down to 3 m. Hence, even small icebergs become visible. The proposed algorithm is based on the iterative censoring constant false alarm rate (IC-CFAR) detector, which has proven its usefulness for target detection already. Different from the standard approach, we not only estimate statistical properties of open water backscatter expressed by a probability density function, but also survey in more detail recurring patterns (i.e. waves) building on former studies on wind and sea state retrieval. This allows discriminating icebergs from most false alarms that arise from rough sea and strong winds. Experiments carried out with a series of HH polarized TerraSAR-X StripMap images acquired between 2012 and 2014 confirm that - due to consideration of wave pattern during image processing - the false alarm rate is reduced by factor three. On average, we recorded 0.002 false alarms per km² and a detection rate of 93 %. Since results are output in near real time (NRT), we provide the basis for supporting operational ship routing in remote ice infested areas.

Item URL in elib:https://elib.dlr.de/94277/
Document Type:Conference or Workshop Item (Speech)
Title:Iceberg Detection over Northern Latitudes Using High Resolution TerraSAR-X Images
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Frost, AnjaAnja.Frost (at) dlr.deUNSPECIFIED
Ressel, RudolfRudolf.Ressel (at) dlr.deUNSPECIFIED
Lehner, SusanneSusanne.Lehner (at) dlr.deUNSPECIFIED
Date:June 2015
Journal or Publication Title:36th Canadian Symposium of Remote Sensing - Abstracts
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Northern Applications, Iceberg Detection, CFAR, TerraSAR-X, Iceberg Monitoring, Ship Navigation
Event Title:36th Canadian Symposium of Remote Sensing
Event Type:international Conference
Event Dates:8.-11. June 2015
Organizer:Canadian Remote Sensing Society
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 Entwicklung und Erprobung von Verfahren zur Gewässerfernerkundung (old)
Location: Bremen
Institutes and Institutions:Remote Sensing Technology Institute > SAR Signal Processing
Deposited By: Frost, Dr. Anja
Deposited On:04 Feb 2015 12:08
Last Modified:21 Jan 2016 10:47

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