A Method to Improve High-Resolution Sea Ice Drift Retrievals in the Presence of Deformation Zones
Retrievals of sea ice drift from synthetic aperture radar (SAR) images at high spatial resolution are valuable for understanding kinematic behavior and deformation processes of the ice at different spatial scales. Ice deformation causes temporal changes in patterns observed in sequences of SAR image...
Published in: | Remote Sensing |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
2017
|
Subjects: | |
Online Access: | https://epic.awi.de/id/eprint/45379/ https://epic.awi.de/id/eprint/45379/1/Griebel_Dierking-2017.pdf https://doi.org/10.3390/rs9070718 https://hdl.handle.net/10013/epic.51531 https://hdl.handle.net/10013/epic.51531.d001 |
id |
ftawi:oai:epic.awi.de:45379 |
---|---|
record_format |
openpolar |
spelling |
ftawi:oai:epic.awi.de:45379 2024-09-15T18:34:41+00:00 A Method to Improve High-Resolution Sea Ice Drift Retrievals in the Presence of Deformation Zones Griebel, Jakob Dierking, Wolfgang 2017-07-12 application/pdf https://epic.awi.de/id/eprint/45379/ https://epic.awi.de/id/eprint/45379/1/Griebel_Dierking-2017.pdf https://doi.org/10.3390/rs9070718 https://hdl.handle.net/10013/epic.51531 https://hdl.handle.net/10013/epic.51531.d001 unknown https://epic.awi.de/id/eprint/45379/1/Griebel_Dierking-2017.pdf https://hdl.handle.net/10013/epic.51531.d001 Griebel, J. and Dierking, W. (2017) A Method to Improve High-Resolution Sea Ice Drift Retrievals in the Presence of Deformation Zones , Remote Sensing, 9 (7), p. 718 . doi:10.3390/rs9070718 <https://doi.org/10.3390/rs9070718> , hdl:10013/epic.51531 EPIC3Remote Sensing, 9(7), pp. 718, ISSN: 2072-4292 Article peerRev 2017 ftawi https://doi.org/10.3390/rs9070718 2024-06-24T04:18:50Z Retrievals of sea ice drift from synthetic aperture radar (SAR) images at high spatial resolution are valuable for understanding kinematic behavior and deformation processes of the ice at different spatial scales. Ice deformation causes temporal changes in patterns observed in sequences of SAR images; which makes it difficult to retrieve ice displacement with algorithms based on correlation and feature identification techniques. Here, we propose two extensions to a pattern matching algorithm, with the objective to improve the reliability of the retrieved sea ice drift field at spatial resolutions of a few hundred meters. Firstly, we extended a reliability assessment proposed in an earlier study, which is based on analyzing texture and correlation parameters of SAR image pairs, with the aim to reject unreliable pattern matches. The second step is specifically adapted to the presence of deformation features to avoid the erasing of discontinuities in the drift field. We suggest an adapted detection scheme that identifies linear deformation features (LDFs) in the drift vector field, and detects and replaces outliers after considering the presence of such LDFs in their neighborhood. We validate the improvement of our pattern matching algorithm by comparing the automatically retrieved drift to manually derived reference data for three SAR scenes acquired over different sea ice covered regions. Article in Journal/Newspaper Sea ice Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Remote Sensing 9 7 718 |
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 |
Retrievals of sea ice drift from synthetic aperture radar (SAR) images at high spatial resolution are valuable for understanding kinematic behavior and deformation processes of the ice at different spatial scales. Ice deformation causes temporal changes in patterns observed in sequences of SAR images; which makes it difficult to retrieve ice displacement with algorithms based on correlation and feature identification techniques. Here, we propose two extensions to a pattern matching algorithm, with the objective to improve the reliability of the retrieved sea ice drift field at spatial resolutions of a few hundred meters. Firstly, we extended a reliability assessment proposed in an earlier study, which is based on analyzing texture and correlation parameters of SAR image pairs, with the aim to reject unreliable pattern matches. The second step is specifically adapted to the presence of deformation features to avoid the erasing of discontinuities in the drift field. We suggest an adapted detection scheme that identifies linear deformation features (LDFs) in the drift vector field, and detects and replaces outliers after considering the presence of such LDFs in their neighborhood. We validate the improvement of our pattern matching algorithm by comparing the automatically retrieved drift to manually derived reference data for three SAR scenes acquired over different sea ice covered regions. |
format |
Article in Journal/Newspaper |
author |
Griebel, Jakob Dierking, Wolfgang |
spellingShingle |
Griebel, Jakob Dierking, Wolfgang A Method to Improve High-Resolution Sea Ice Drift Retrievals in the Presence of Deformation Zones |
author_facet |
Griebel, Jakob Dierking, Wolfgang |
author_sort |
Griebel, Jakob |
title |
A Method to Improve High-Resolution Sea Ice Drift Retrievals in the Presence of Deformation Zones |
title_short |
A Method to Improve High-Resolution Sea Ice Drift Retrievals in the Presence of Deformation Zones |
title_full |
A Method to Improve High-Resolution Sea Ice Drift Retrievals in the Presence of Deformation Zones |
title_fullStr |
A Method to Improve High-Resolution Sea Ice Drift Retrievals in the Presence of Deformation Zones |
title_full_unstemmed |
A Method to Improve High-Resolution Sea Ice Drift Retrievals in the Presence of Deformation Zones |
title_sort |
method to improve high-resolution sea ice drift retrievals in the presence of deformation zones |
publishDate |
2017 |
url |
https://epic.awi.de/id/eprint/45379/ https://epic.awi.de/id/eprint/45379/1/Griebel_Dierking-2017.pdf https://doi.org/10.3390/rs9070718 https://hdl.handle.net/10013/epic.51531 https://hdl.handle.net/10013/epic.51531.d001 |
genre |
Sea ice |
genre_facet |
Sea ice |
op_source |
EPIC3Remote Sensing, 9(7), pp. 718, ISSN: 2072-4292 |
op_relation |
https://epic.awi.de/id/eprint/45379/1/Griebel_Dierking-2017.pdf https://hdl.handle.net/10013/epic.51531.d001 Griebel, J. and Dierking, W. (2017) A Method to Improve High-Resolution Sea Ice Drift Retrievals in the Presence of Deformation Zones , Remote Sensing, 9 (7), p. 718 . doi:10.3390/rs9070718 <https://doi.org/10.3390/rs9070718> , hdl:10013/epic.51531 |
op_doi |
https://doi.org/10.3390/rs9070718 |
container_title |
Remote Sensing |
container_volume |
9 |
container_issue |
7 |
container_start_page |
718 |
_version_ |
1810476634204012544 |