A Depolarization Ratio Anomaly Detector to identify icebergs in sea ice using dual-polarization SAR images
Icebergs represent hazards to maritime traffic and offshore operations. Satellite Synthetic Aperture Radar (SAR) is very valuable for the observation of polar regions and extensive work was already carried out on detection and tracking of large icebergs. However, the identification of small icebergs...
Published in: | IEEE Transactions on Geoscience and Remote Sensing |
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Online Access: | https://oro.open.ac.uk/46729/ https://oro.open.ac.uk/46729/1/IcebergDet_vORO.pdf https://doi.org/10.1109/TGRS.2016.2569450 |
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ftopenunivgb:oai:oro.open.ac.uk:46729 2023-06-11T04:12:18+02:00 A Depolarization Ratio Anomaly Detector to identify icebergs in sea ice using dual-polarization SAR images Marino, Armando Dierking, Wolfgang Christine, Wesche 2016-06-15 application/pdf https://oro.open.ac.uk/46729/ https://oro.open.ac.uk/46729/1/IcebergDet_vORO.pdf https://doi.org/10.1109/TGRS.2016.2569450 unknown https://oro.open.ac.uk/46729/1/IcebergDet_vORO.pdf Marino, Armando <http://oro.open.ac.uk/view/person/am37653.html>; Dierking, Wolfgang and Christine, Wesche (2016). A Depolarization Ratio Anomaly Detector to identify icebergs in sea ice using dual-polarization SAR images. IEEE Transactions on Geoscience and Remote Sensing, 54(9) pp. 5602–5615. Journal Item Public PeerReviewed 2016 ftopenunivgb https://doi.org/10.1109/TGRS.2016.2569450 2023-05-28T05:54:12Z Icebergs represent hazards to maritime traffic and offshore operations. Satellite Synthetic Aperture Radar (SAR) is very valuable for the observation of polar regions and extensive work was already carried out on detection and tracking of large icebergs. However, the identification of small icebergs is still challenging especially when these are embedded in sea ice. In this work, a new detector is proposed based on incoherent dual-polarization SAR images. The algorithm considers the limited extension of small icebergs, which are supposed to have a stronger cross polarization and higher cross- over co-polarization ratio compared to the surrounding sea or sea ice background. The new detector is tested with two satellite systems. Firstly, RADARSAT-2 quad-polarimetric images are analyzed to evaluate the effects of high resolution data. Subsequently a more exhaustive analysis is carried out using dual-polarization ground detected Sentinel-1a Extra Wide swath images acquired over the time span of two months. The test areas are on the East Coast of Greenland, where several icebergs have been observed. A quantitative analysis and a comparison with a detector using only the cross polarization channel is carried out exploiting grounded icebergs as test targets. The proposed methodology improves the contrast between icebergs and sea ice clutter by up to 75 times. This returns an improved probability of detection. Article in Journal/Newspaper Greenland Sea ice The Open University: Open Research Online (ORO) Greenland IEEE Transactions on Geoscience and Remote Sensing 54 9 5602 5615 |
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Open Polar |
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The Open University: Open Research Online (ORO) |
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description |
Icebergs represent hazards to maritime traffic and offshore operations. Satellite Synthetic Aperture Radar (SAR) is very valuable for the observation of polar regions and extensive work was already carried out on detection and tracking of large icebergs. However, the identification of small icebergs is still challenging especially when these are embedded in sea ice. In this work, a new detector is proposed based on incoherent dual-polarization SAR images. The algorithm considers the limited extension of small icebergs, which are supposed to have a stronger cross polarization and higher cross- over co-polarization ratio compared to the surrounding sea or sea ice background. The new detector is tested with two satellite systems. Firstly, RADARSAT-2 quad-polarimetric images are analyzed to evaluate the effects of high resolution data. Subsequently a more exhaustive analysis is carried out using dual-polarization ground detected Sentinel-1a Extra Wide swath images acquired over the time span of two months. The test areas are on the East Coast of Greenland, where several icebergs have been observed. A quantitative analysis and a comparison with a detector using only the cross polarization channel is carried out exploiting grounded icebergs as test targets. The proposed methodology improves the contrast between icebergs and sea ice clutter by up to 75 times. This returns an improved probability of detection. |
format |
Article in Journal/Newspaper |
author |
Marino, Armando Dierking, Wolfgang Christine, Wesche |
spellingShingle |
Marino, Armando Dierking, Wolfgang Christine, Wesche A Depolarization Ratio Anomaly Detector to identify icebergs in sea ice using dual-polarization SAR images |
author_facet |
Marino, Armando Dierking, Wolfgang Christine, Wesche |
author_sort |
Marino, Armando |
title |
A Depolarization Ratio Anomaly Detector to identify icebergs in sea ice using dual-polarization SAR images |
title_short |
A Depolarization Ratio Anomaly Detector to identify icebergs in sea ice using dual-polarization SAR images |
title_full |
A Depolarization Ratio Anomaly Detector to identify icebergs in sea ice using dual-polarization SAR images |
title_fullStr |
A Depolarization Ratio Anomaly Detector to identify icebergs in sea ice using dual-polarization SAR images |
title_full_unstemmed |
A Depolarization Ratio Anomaly Detector to identify icebergs in sea ice using dual-polarization SAR images |
title_sort |
depolarization ratio anomaly detector to identify icebergs in sea ice using dual-polarization sar images |
publishDate |
2016 |
url |
https://oro.open.ac.uk/46729/ https://oro.open.ac.uk/46729/1/IcebergDet_vORO.pdf https://doi.org/10.1109/TGRS.2016.2569450 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Sea ice |
genre_facet |
Greenland Sea ice |
op_relation |
https://oro.open.ac.uk/46729/1/IcebergDet_vORO.pdf Marino, Armando <http://oro.open.ac.uk/view/person/am37653.html>; Dierking, Wolfgang and Christine, Wesche (2016). A Depolarization Ratio Anomaly Detector to identify icebergs in sea ice using dual-polarization SAR images. IEEE Transactions on Geoscience and Remote Sensing, 54(9) pp. 5602–5615. |
op_doi |
https://doi.org/10.1109/TGRS.2016.2569450 |
container_title |
IEEE Transactions on Geoscience and Remote Sensing |
container_volume |
54 |
container_issue |
9 |
container_start_page |
5602 |
op_container_end_page |
5615 |
_version_ |
1768388064786251776 |