Observation of sea-ice dynamics using synthetic aperture radar images: Automated analysis
The European Space Agency's ERS-1 satellite, as well as others planned to follow, is expected to carry synthetic-aperture radars (SARs) over the polar regions beginning in 1989. A key component in utilization of these SAR data is an automated scheme for extracting the sea-ice velocity field fro...
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1988
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ftnasantrs:oai:casi.ntrs.nasa.gov:19880037707 2023-05-15T18:16:30+02:00 Observation of sea-ice dynamics using synthetic aperture radar images: Automated analysis Vesecky, John F. Samadani, Ramin Smith, Martha P. Daida, Jason M. Bracewell, Ronald N. Unclassified, Unlimited, Publicly available Jan 1, 1988 http://ntrs.nasa.gov/search.jsp?R=19880037707 unknown http://ntrs.nasa.gov/search.jsp?R=19880037707 Accession ID: 88A24934 Copyright Other Sources 48 IEEE Transactions on Geoscience and Remote Sensing; 26; 38-48 1988 ftnasantrs 2012-02-15T17:33:09Z The European Space Agency's ERS-1 satellite, as well as others planned to follow, is expected to carry synthetic-aperture radars (SARs) over the polar regions beginning in 1989. A key component in utilization of these SAR data is an automated scheme for extracting the sea-ice velocity field from a time sequence of SAR images of the same geographical region. Two techniques for automated sea-ice tracking, image pyramid area correlation (hierarchical correlation) and feature tracking, are described. Each technique is applied to a pair of Seasat SAR sea-ice images. The results compare well with each other and with manually tracked estimates of the ice velocity. The advantages and disadvantages of these automated methods are pointed out. Using these ice velocity field estimates it is possible to construct one sea-ice image from the other member of the pair. Comparing the reconstructed image with the observed image, errors in the estimated velocity field can be recognized and a useful probable error display created automatically to accompany ice velocity estimates. It is suggested that this error display may be useful in segmenting the sea ice observed into regions that move as rigid plates of significant ice velocity shear and distortion. Other/Unknown Material Sea ice NASA Technical Reports Server (NTRS) Pyramid ENVELOPE(157.300,157.300,-81.333,-81.333) |
institution |
Open Polar |
collection |
NASA Technical Reports Server (NTRS) |
op_collection_id |
ftnasantrs |
language |
unknown |
topic |
48 |
spellingShingle |
48 Vesecky, John F. Samadani, Ramin Smith, Martha P. Daida, Jason M. Bracewell, Ronald N. Observation of sea-ice dynamics using synthetic aperture radar images: Automated analysis |
topic_facet |
48 |
description |
The European Space Agency's ERS-1 satellite, as well as others planned to follow, is expected to carry synthetic-aperture radars (SARs) over the polar regions beginning in 1989. A key component in utilization of these SAR data is an automated scheme for extracting the sea-ice velocity field from a time sequence of SAR images of the same geographical region. Two techniques for automated sea-ice tracking, image pyramid area correlation (hierarchical correlation) and feature tracking, are described. Each technique is applied to a pair of Seasat SAR sea-ice images. The results compare well with each other and with manually tracked estimates of the ice velocity. The advantages and disadvantages of these automated methods are pointed out. Using these ice velocity field estimates it is possible to construct one sea-ice image from the other member of the pair. Comparing the reconstructed image with the observed image, errors in the estimated velocity field can be recognized and a useful probable error display created automatically to accompany ice velocity estimates. It is suggested that this error display may be useful in segmenting the sea ice observed into regions that move as rigid plates of significant ice velocity shear and distortion. |
format |
Other/Unknown Material |
author |
Vesecky, John F. Samadani, Ramin Smith, Martha P. Daida, Jason M. Bracewell, Ronald N. |
author_facet |
Vesecky, John F. Samadani, Ramin Smith, Martha P. Daida, Jason M. Bracewell, Ronald N. |
author_sort |
Vesecky, John F. |
title |
Observation of sea-ice dynamics using synthetic aperture radar images: Automated analysis |
title_short |
Observation of sea-ice dynamics using synthetic aperture radar images: Automated analysis |
title_full |
Observation of sea-ice dynamics using synthetic aperture radar images: Automated analysis |
title_fullStr |
Observation of sea-ice dynamics using synthetic aperture radar images: Automated analysis |
title_full_unstemmed |
Observation of sea-ice dynamics using synthetic aperture radar images: Automated analysis |
title_sort |
observation of sea-ice dynamics using synthetic aperture radar images: automated analysis |
publishDate |
1988 |
url |
http://ntrs.nasa.gov/search.jsp?R=19880037707 |
op_coverage |
Unclassified, Unlimited, Publicly available |
long_lat |
ENVELOPE(157.300,157.300,-81.333,-81.333) |
geographic |
Pyramid |
geographic_facet |
Pyramid |
genre |
Sea ice |
genre_facet |
Sea ice |
op_source |
Other Sources |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19880037707 Accession ID: 88A24934 |
op_rights |
Copyright |
_version_ |
1766190152183447552 |