Iceberg signatures and detection in synthetic aperture radar (SAR) images in two test regions of the Weddell Sea, Antarctica
A pixel-based methodology has been established for automatic identification of icebergs in satellite synthetic aperture radar (SAR) images acquired during different seasons and for different seaice conditions. This includes, in particular, smaller icebergs (longitudinal axis 100m to 18.5 km). Invest...
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Online Access: | https://epic.awi.de/id/eprint/25912/ https://epic.awi.de/id/eprint/25912/1/11J020R1.pdf https://hdl.handle.net/10013/epic.38879 https://hdl.handle.net/10013/epic.38879.d001 |
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ftawi:oai:epic.awi.de:25912 2023-05-15T13:46:51+02:00 Iceberg signatures and detection in synthetic aperture radar (SAR) images in two test regions of the Weddell Sea, Antarctica Wesche, Christine Dierking, Wolfgang 2012 application/pdf https://epic.awi.de/id/eprint/25912/ https://epic.awi.de/id/eprint/25912/1/11J020R1.pdf https://hdl.handle.net/10013/epic.38879 https://hdl.handle.net/10013/epic.38879.d001 unknown INT GLACIOL SOC https://epic.awi.de/id/eprint/25912/1/11J020R1.pdf https://hdl.handle.net/10013/epic.38879.d001 Wesche, C. orcid:0000-0002-9786-4010 and Dierking, W. orcid:0000-0002-5031-648X (2012) Iceberg signatures and detection in synthetic aperture radar (SAR) images in two test regions of the Weddell Sea, Antarctica , Journal of Glaciology, 58 (208), pp. 325-339 . doi:10.3189/2012J0G11J020 <https://doi.org/10.3189/2012J0G11J020> , hdl:10013/epic.38879 EPIC3Journal of Glaciology, INT GLACIOL SOC, 58(208), pp. 325-339, ISSN: 0022-1430 Article isiRev 2012 ftawi https://doi.org/10.3189/2012J0G11J020 2021-12-24T15:35:33Z A pixel-based methodology has been established for automatic identification of icebergs in satellite synthetic aperture radar (SAR) images acquired during different seasons and for different seaice conditions. This includes, in particular, smaller icebergs (longitudinal axis 100m to 18.5 km). Investigations were carried out for two test regions located in theWeddell Sea, Antarctica, using images of the Envisat Advanced SAR (ASAR) at HH polarization and of the European Remote-sensing Satellite-2 (ERS-2) SAR (VV-polarized). From the former, a sequence of Image Mode and Wide Swath Mode data are available for the whole of 2006. The ERS data were acquired around the tip of the Antarctic Peninsula in spring and summer months of the years 2000–03. The minimum size of icebergs that could be identified in the IM images was <0.02km2. Radar backscattering coefficients of icebergs, sea ice and open water were determined separately.We demonstrate that the error in separating icebergs from their surroundings (sea ice or open water) depends on meteorological, oceanographic and sea-ice conditions. Also the pre-processing of the SAR images (e.g. speckle reduction) influences iceberg recognition. Differences in detection accuracy as a function of season could not be substantiated for our test sites, but have in general to be taken into account, as results of other investigations indicate. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Antarctica Journal Iceberg* Journal of Glaciology Sea ice Weddell Sea Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Antarctic The Antarctic Antarctic Peninsula Weddell Sea Weddell Asar ENVELOPE(134.033,134.033,68.667,68.667) Journal of Glaciology 58 208 325 339 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
A pixel-based methodology has been established for automatic identification of icebergs in satellite synthetic aperture radar (SAR) images acquired during different seasons and for different seaice conditions. This includes, in particular, smaller icebergs (longitudinal axis 100m to 18.5 km). Investigations were carried out for two test regions located in theWeddell Sea, Antarctica, using images of the Envisat Advanced SAR (ASAR) at HH polarization and of the European Remote-sensing Satellite-2 (ERS-2) SAR (VV-polarized). From the former, a sequence of Image Mode and Wide Swath Mode data are available for the whole of 2006. The ERS data were acquired around the tip of the Antarctic Peninsula in spring and summer months of the years 2000–03. The minimum size of icebergs that could be identified in the IM images was <0.02km2. Radar backscattering coefficients of icebergs, sea ice and open water were determined separately.We demonstrate that the error in separating icebergs from their surroundings (sea ice or open water) depends on meteorological, oceanographic and sea-ice conditions. Also the pre-processing of the SAR images (e.g. speckle reduction) influences iceberg recognition. Differences in detection accuracy as a function of season could not be substantiated for our test sites, but have in general to be taken into account, as results of other investigations indicate. |
format |
Article in Journal/Newspaper |
author |
Wesche, Christine Dierking, Wolfgang |
spellingShingle |
Wesche, Christine Dierking, Wolfgang Iceberg signatures and detection in synthetic aperture radar (SAR) images in two test regions of the Weddell Sea, Antarctica |
author_facet |
Wesche, Christine Dierking, Wolfgang |
author_sort |
Wesche, Christine |
title |
Iceberg signatures and detection in synthetic aperture radar (SAR) images in two test regions of the Weddell Sea, Antarctica |
title_short |
Iceberg signatures and detection in synthetic aperture radar (SAR) images in two test regions of the Weddell Sea, Antarctica |
title_full |
Iceberg signatures and detection in synthetic aperture radar (SAR) images in two test regions of the Weddell Sea, Antarctica |
title_fullStr |
Iceberg signatures and detection in synthetic aperture radar (SAR) images in two test regions of the Weddell Sea, Antarctica |
title_full_unstemmed |
Iceberg signatures and detection in synthetic aperture radar (SAR) images in two test regions of the Weddell Sea, Antarctica |
title_sort |
iceberg signatures and detection in synthetic aperture radar (sar) images in two test regions of the weddell sea, antarctica |
publisher |
INT GLACIOL SOC |
publishDate |
2012 |
url |
https://epic.awi.de/id/eprint/25912/ https://epic.awi.de/id/eprint/25912/1/11J020R1.pdf https://hdl.handle.net/10013/epic.38879 https://hdl.handle.net/10013/epic.38879.d001 |
long_lat |
ENVELOPE(134.033,134.033,68.667,68.667) |
geographic |
Antarctic The Antarctic Antarctic Peninsula Weddell Sea Weddell Asar |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Weddell Sea Weddell Asar |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Antarctica Journal Iceberg* Journal of Glaciology Sea ice Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Antarctica Journal Iceberg* Journal of Glaciology Sea ice Weddell Sea |
op_source |
EPIC3Journal of Glaciology, INT GLACIOL SOC, 58(208), pp. 325-339, ISSN: 0022-1430 |
op_relation |
https://epic.awi.de/id/eprint/25912/1/11J020R1.pdf https://hdl.handle.net/10013/epic.38879.d001 Wesche, C. orcid:0000-0002-9786-4010 and Dierking, W. orcid:0000-0002-5031-648X (2012) Iceberg signatures and detection in synthetic aperture radar (SAR) images in two test regions of the Weddell Sea, Antarctica , Journal of Glaciology, 58 (208), pp. 325-339 . doi:10.3189/2012J0G11J020 <https://doi.org/10.3189/2012J0G11J020> , hdl:10013/epic.38879 |
op_doi |
https://doi.org/10.3189/2012J0G11J020 |
container_title |
Journal of Glaciology |
container_volume |
58 |
container_issue |
208 |
container_start_page |
325 |
op_container_end_page |
339 |
_version_ |
1766245350606110720 |