Reliability Measures for Sea Ice Motion Retrieval From Synthetic Aperture Radar Images
Sea ice motion is triggered by wind and ocean currents. Its magnitude and direction can be automatically retrieved using pairs of satellite images acquired over the same area. However, external reference data for validation of drift retrievals, such as tracks from buoys, are sparse. Information abou...
Published in: | IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing |
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IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
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ftawi:oai:epic.awi.de:37368 2023-05-15T18:17:11+02:00 Reliability Measures for Sea Ice Motion Retrieval From Synthetic Aperture Radar Images Hollands, Thomas Linow, Stefanie Dierking, Wolfgang 2015-01 application/pdf https://epic.awi.de/id/eprint/37368/ https://epic.awi.de/id/eprint/37368/1/PostprintJSTARSHollandsWM.pdf https://hdl.handle.net/10013/epic.45036 https://hdl.handle.net/10013/epic.45036.d001 unknown IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC https://epic.awi.de/id/eprint/37368/1/PostprintJSTARSHollandsWM.pdf https://hdl.handle.net/10013/epic.45036.d001 Hollands, T. orcid:0000-0003-0824-4037 , Linow, S. and Dierking, W. orcid:0000-0002-5031-648X (2015) Reliability Measures for Sea Ice Motion Retrieval From Synthetic Aperture Radar Images , IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 8 (1), pp. 67-75 . doi:10.1109/JSTARS.2014.2340572 <https://doi.org/10.1109/JSTARS.2014.2340572> , hdl:10013/epic.45036 info:eu-repo/semantics/openAccess EPIC3IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 8(1), pp. 67-75, ISSN: 1939-1404 Article isiRev info:eu-repo/semantics/article 2015 ftawi https://doi.org/10.1109/JSTARS.2014.2340572 2021-12-24T15:40:14Z Sea ice motion is triggered by wind and ocean currents. Its magnitude and direction can be automatically retrieved using pairs of satellite images acquired over the same area. However, external reference data for validation of drift retrievals, such as tracks from buoys, are sparse. Information about the reliability of the retrieved ice drift field is crucial for applications such as operational sea ice mapping or validation of computer models for simulations of sea ice dynamics. In this paper, we introduce an intrinsic measure based on the properties of radar image pairs to assess the reliability of the retrieved ice drift vectors. The proposed method combines different parameters, e.g., correlation coefficient and two textural quantities, to provide information about the suitability of subimage regions for pattern matching. In this way, we generate a quality parameter [called confidence factor (CFA)] for the calculated ice drift velocities. The CFA is compared to results obtained by “backmatching.” The latter requires that the drift field is computed twice using the image pair, first in sequential and then in reversed order. For stable ice conditions, the results show that areas regarded as unreliable by the CFA compare well with the areas revealing larger differences from backmatching. Article in Journal/Newspaper Sea ice Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing 8 1 67 75 |
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Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
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description |
Sea ice motion is triggered by wind and ocean currents. Its magnitude and direction can be automatically retrieved using pairs of satellite images acquired over the same area. However, external reference data for validation of drift retrievals, such as tracks from buoys, are sparse. Information about the reliability of the retrieved ice drift field is crucial for applications such as operational sea ice mapping or validation of computer models for simulations of sea ice dynamics. In this paper, we introduce an intrinsic measure based on the properties of radar image pairs to assess the reliability of the retrieved ice drift vectors. The proposed method combines different parameters, e.g., correlation coefficient and two textural quantities, to provide information about the suitability of subimage regions for pattern matching. In this way, we generate a quality parameter [called confidence factor (CFA)] for the calculated ice drift velocities. The CFA is compared to results obtained by “backmatching.” The latter requires that the drift field is computed twice using the image pair, first in sequential and then in reversed order. For stable ice conditions, the results show that areas regarded as unreliable by the CFA compare well with the areas revealing larger differences from backmatching. |
format |
Article in Journal/Newspaper |
author |
Hollands, Thomas Linow, Stefanie Dierking, Wolfgang |
spellingShingle |
Hollands, Thomas Linow, Stefanie Dierking, Wolfgang Reliability Measures for Sea Ice Motion Retrieval From Synthetic Aperture Radar Images |
author_facet |
Hollands, Thomas Linow, Stefanie Dierking, Wolfgang |
author_sort |
Hollands, Thomas |
title |
Reliability Measures for Sea Ice Motion Retrieval From Synthetic Aperture Radar Images |
title_short |
Reliability Measures for Sea Ice Motion Retrieval From Synthetic Aperture Radar Images |
title_full |
Reliability Measures for Sea Ice Motion Retrieval From Synthetic Aperture Radar Images |
title_fullStr |
Reliability Measures for Sea Ice Motion Retrieval From Synthetic Aperture Radar Images |
title_full_unstemmed |
Reliability Measures for Sea Ice Motion Retrieval From Synthetic Aperture Radar Images |
title_sort |
reliability measures for sea ice motion retrieval from synthetic aperture radar images |
publisher |
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC |
publishDate |
2015 |
url |
https://epic.awi.de/id/eprint/37368/ https://epic.awi.de/id/eprint/37368/1/PostprintJSTARSHollandsWM.pdf https://hdl.handle.net/10013/epic.45036 https://hdl.handle.net/10013/epic.45036.d001 |
genre |
Sea ice |
genre_facet |
Sea ice |
op_source |
EPIC3IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 8(1), pp. 67-75, ISSN: 1939-1404 |
op_relation |
https://epic.awi.de/id/eprint/37368/1/PostprintJSTARSHollandsWM.pdf https://hdl.handle.net/10013/epic.45036.d001 Hollands, T. orcid:0000-0003-0824-4037 , Linow, S. and Dierking, W. orcid:0000-0002-5031-648X (2015) Reliability Measures for Sea Ice Motion Retrieval From Synthetic Aperture Radar Images , IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 8 (1), pp. 67-75 . doi:10.1109/JSTARS.2014.2340572 <https://doi.org/10.1109/JSTARS.2014.2340572> , hdl:10013/epic.45036 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1109/JSTARS.2014.2340572 |
container_title |
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing |
container_volume |
8 |
container_issue |
1 |
container_start_page |
67 |
op_container_end_page |
75 |
_version_ |
1766191275178983424 |