A method for sub-pixel scale feature-tracking using Radarsat images applied to the Mertz Glacier Tongue, East Antarctica
Tracking features between pairs of satellite synthetic aperture radar (SAR) images using image crosscorrelation methods is a powerful tool for defining regions of image movement such as ice flow of Antarctic glaciers. Unlike optical images, processed SAR images have various instrumental effects such...
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Elsevier Science Inc
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Online Access: | https://doi.org/10.1016/j.rse.2009.03.015 http://ecite.utas.edu.au/61740 |
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ftunivtasecite:oai:ecite.utas.edu.au:61740 2023-05-15T13:35:38+02:00 A method for sub-pixel scale feature-tracking using Radarsat images applied to the Mertz Glacier Tongue, East Antarctica Giles, AB Massom, RA Warner, RC 2009 application/pdf https://doi.org/10.1016/j.rse.2009.03.015 http://ecite.utas.edu.au/61740 en eng Elsevier Science Inc http://ecite.utas.edu.au/61740/1/Giles-et_al-RSE-2009.pdf http://dx.doi.org/10.1016/j.rse.2009.03.015 Giles, AB and Massom, RA and Warner, RC, A method for sub-pixel scale feature-tracking using Radarsat images applied to the Mertz Glacier Tongue, East Antarctica, Remote Sensing of Environment, 113, (8) pp. 1691-1699. ISSN 0034-4257 (2009) [Refereed Article] http://ecite.utas.edu.au/61740 Earth Sciences Physical Geography and Environmental Geoscience Glaciology Refereed Article PeerReviewed 2009 ftunivtasecite https://doi.org/10.1016/j.rse.2009.03.015 2019-12-13T21:32:11Z Tracking features between pairs of satellite synthetic aperture radar (SAR) images using image crosscorrelation methods is a powerful tool for defining regions of image movement such as ice flow of Antarctic glaciers. Unlike optical images, processed SAR images have various instrumental effects such as view angle distortions and lateral displacement errors caused by slant range mapping. Co-registration issues are problematic and need to be addressed if there are few/no suitable stationary tie points at or near sea level within the images. Methods are presented that use Radarsat ScanSAR images to reliably measure sub-pixel displacements with errors of ≲0.25 pixels but this estimate is target dependent. The techniques and issues are illustrated using examples from a long-term study of the Mertz Glacier Tongue in East Antarctica. For image pairs only a few days apart, this extensive structure forms an excellent grid-like test pattern which provides up to 5000 valid correlation matches. Images separated by 100's of days can then be processed in the same way to reveal many subtle and some large changes over time. The technique described is robust and may be widely applicable. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Mertz Glacier eCite UTAS (University of Tasmania) Antarctic East Antarctica Mertz Glacier ENVELOPE(144.500,144.500,-67.667,-67.667) Mertz Glacier Tongue ENVELOPE(145.500,145.500,-67.167,-67.167) Remote Sensing of Environment 113 8 1691 1699 |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Physical Geography and Environmental Geoscience Glaciology |
spellingShingle |
Earth Sciences Physical Geography and Environmental Geoscience Glaciology Giles, AB Massom, RA Warner, RC A method for sub-pixel scale feature-tracking using Radarsat images applied to the Mertz Glacier Tongue, East Antarctica |
topic_facet |
Earth Sciences Physical Geography and Environmental Geoscience Glaciology |
description |
Tracking features between pairs of satellite synthetic aperture radar (SAR) images using image crosscorrelation methods is a powerful tool for defining regions of image movement such as ice flow of Antarctic glaciers. Unlike optical images, processed SAR images have various instrumental effects such as view angle distortions and lateral displacement errors caused by slant range mapping. Co-registration issues are problematic and need to be addressed if there are few/no suitable stationary tie points at or near sea level within the images. Methods are presented that use Radarsat ScanSAR images to reliably measure sub-pixel displacements with errors of ≲0.25 pixels but this estimate is target dependent. The techniques and issues are illustrated using examples from a long-term study of the Mertz Glacier Tongue in East Antarctica. For image pairs only a few days apart, this extensive structure forms an excellent grid-like test pattern which provides up to 5000 valid correlation matches. Images separated by 100's of days can then be processed in the same way to reveal many subtle and some large changes over time. The technique described is robust and may be widely applicable. |
format |
Article in Journal/Newspaper |
author |
Giles, AB Massom, RA Warner, RC |
author_facet |
Giles, AB Massom, RA Warner, RC |
author_sort |
Giles, AB |
title |
A method for sub-pixel scale feature-tracking using Radarsat images applied to the Mertz Glacier Tongue, East Antarctica |
title_short |
A method for sub-pixel scale feature-tracking using Radarsat images applied to the Mertz Glacier Tongue, East Antarctica |
title_full |
A method for sub-pixel scale feature-tracking using Radarsat images applied to the Mertz Glacier Tongue, East Antarctica |
title_fullStr |
A method for sub-pixel scale feature-tracking using Radarsat images applied to the Mertz Glacier Tongue, East Antarctica |
title_full_unstemmed |
A method for sub-pixel scale feature-tracking using Radarsat images applied to the Mertz Glacier Tongue, East Antarctica |
title_sort |
method for sub-pixel scale feature-tracking using radarsat images applied to the mertz glacier tongue, east antarctica |
publisher |
Elsevier Science Inc |
publishDate |
2009 |
url |
https://doi.org/10.1016/j.rse.2009.03.015 http://ecite.utas.edu.au/61740 |
long_lat |
ENVELOPE(144.500,144.500,-67.667,-67.667) ENVELOPE(145.500,145.500,-67.167,-67.167) |
geographic |
Antarctic East Antarctica Mertz Glacier Mertz Glacier Tongue |
geographic_facet |
Antarctic East Antarctica Mertz Glacier Mertz Glacier Tongue |
genre |
Antarc* Antarctic Antarctica East Antarctica Mertz Glacier |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Mertz Glacier |
op_relation |
http://ecite.utas.edu.au/61740/1/Giles-et_al-RSE-2009.pdf http://dx.doi.org/10.1016/j.rse.2009.03.015 Giles, AB and Massom, RA and Warner, RC, A method for sub-pixel scale feature-tracking using Radarsat images applied to the Mertz Glacier Tongue, East Antarctica, Remote Sensing of Environment, 113, (8) pp. 1691-1699. ISSN 0034-4257 (2009) [Refereed Article] http://ecite.utas.edu.au/61740 |
op_doi |
https://doi.org/10.1016/j.rse.2009.03.015 |
container_title |
Remote Sensing of Environment |
container_volume |
113 |
container_issue |
8 |
container_start_page |
1691 |
op_container_end_page |
1699 |
_version_ |
1766068208240951296 |