Sea ice feature and type identification in merged ERS-1 SAR and LANDSAT Thematic Mapper imagery
LANDSAT Thematic Mapper (TM) and ERS-1 SAR (Synthetic Aperture Radar) C band images were acquired for the same area in the Beaufort Sea, 18 Apr. 1992. The two images were co-located to the same grid (25 m resolution) and supervised classification was performed on the TM channel 3 scene in order to c...
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ftnasantrs:oai:casi.ntrs.nasa.gov:19940007289 2023-05-15T15:40:31+02:00 Sea ice feature and type identification in merged ERS-1 SAR and LANDSAT Thematic Mapper imagery Steffen, K. Heinrichs, J. Maslanik, J. Key, J. Unclassified, Unlimited, Publicly available Mar 1, 1993 http://ntrs.nasa.gov/search.jsp?R=19940007289 unknown http://ntrs.nasa.gov/search.jsp?R=19940007289 Accession ID: 94N11761 Copyright CASI 43 ESA, Proceedings of First ERS-1 Symposium on Space at the Service of Our Environment, Volume 1; p 361-365 1993 ftnasantrs 2012-02-15T20:49:05Z LANDSAT Thematic Mapper (TM) and ERS-1 SAR (Synthetic Aperture Radar) C band images were acquired for the same area in the Beaufort Sea, 18 Apr. 1992. The two images were co-located to the same grid (25 m resolution) and supervised classification was performed on the TM channel 3 scene in order to classify open water, nilas, grey ice, first year ice, and multiyear ice. Comparison of the LANDSAT classification and the corresponding dB values from the SAR scene showed that, under the given circumstances (high surface winds), open water/nilas/grey ice as defined by a single ice category by the SAR classifier could not be distinguished from first year ice. Surface roughening due to wind appears to be a major problem for the SAR classifier, as the range of the dB values is large enough to overlap all the other ice categories. Additional information, such as surface wind speed is necessary to overcome part of this problem. Other/Unknown Material Beaufort Sea Sea ice NASA Technical Reports Server (NTRS) |
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NASA Technical Reports Server (NTRS) |
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43 Steffen, K. Heinrichs, J. Maslanik, J. Key, J. Sea ice feature and type identification in merged ERS-1 SAR and LANDSAT Thematic Mapper imagery |
topic_facet |
43 |
description |
LANDSAT Thematic Mapper (TM) and ERS-1 SAR (Synthetic Aperture Radar) C band images were acquired for the same area in the Beaufort Sea, 18 Apr. 1992. The two images were co-located to the same grid (25 m resolution) and supervised classification was performed on the TM channel 3 scene in order to classify open water, nilas, grey ice, first year ice, and multiyear ice. Comparison of the LANDSAT classification and the corresponding dB values from the SAR scene showed that, under the given circumstances (high surface winds), open water/nilas/grey ice as defined by a single ice category by the SAR classifier could not be distinguished from first year ice. Surface roughening due to wind appears to be a major problem for the SAR classifier, as the range of the dB values is large enough to overlap all the other ice categories. Additional information, such as surface wind speed is necessary to overcome part of this problem. |
format |
Other/Unknown Material |
author |
Steffen, K. Heinrichs, J. Maslanik, J. Key, J. |
author_facet |
Steffen, K. Heinrichs, J. Maslanik, J. Key, J. |
author_sort |
Steffen, K. |
title |
Sea ice feature and type identification in merged ERS-1 SAR and LANDSAT Thematic Mapper imagery |
title_short |
Sea ice feature and type identification in merged ERS-1 SAR and LANDSAT Thematic Mapper imagery |
title_full |
Sea ice feature and type identification in merged ERS-1 SAR and LANDSAT Thematic Mapper imagery |
title_fullStr |
Sea ice feature and type identification in merged ERS-1 SAR and LANDSAT Thematic Mapper imagery |
title_full_unstemmed |
Sea ice feature and type identification in merged ERS-1 SAR and LANDSAT Thematic Mapper imagery |
title_sort |
sea ice feature and type identification in merged ers-1 sar and landsat thematic mapper imagery |
publishDate |
1993 |
url |
http://ntrs.nasa.gov/search.jsp?R=19940007289 |
op_coverage |
Unclassified, Unlimited, Publicly available |
genre |
Beaufort Sea Sea ice |
genre_facet |
Beaufort Sea Sea ice |
op_source |
CASI |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19940007289 Accession ID: 94N11761 |
op_rights |
Copyright |
_version_ |
1766372900353343488 |