Pine Island Glacier (Antarctica) velocities from Landsat7 images between 2001 and 2011: FFT-based image correlation for images with data gaps
Remote sensing of ice motion by tracking displacement of surface features is a valuable tool in glaciology. Efficient image feature-tracking programs, such as IMCORR, based on fast Fourier transform methods can produce misleading correlations if there are data gaps in either or both of the reference...
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Online Access: | https://doi.org/10.3189/2013JoG12J113 http://ecite.utas.edu.au/86944 |
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ftunivtasecite:oai:ecite.utas.edu.au:86944 2023-05-15T13:37:23+02:00 Pine Island Glacier (Antarctica) velocities from Landsat7 images between 2001 and 2011: FFT-based image correlation for images with data gaps Warner, RC Roberts, JL 2013 application/pdf https://doi.org/10.3189/2013JoG12J113 http://ecite.utas.edu.au/86944 en eng Int Glaciol Soc http://ecite.utas.edu.au/86944/1/Warner_2013_Pine_Island.pdf http://dx.doi.org/10.3189/2013JoG12J113 Warner, RC and Roberts, JL, Pine Island Glacier (Antarctica) velocities from Landsat7 images between 2001 and 2011: FFT-based image correlation for images with data gaps, Journal of Glaciology, 59, (215) pp. 571-582. ISSN 0022-1430 (2013) [Refereed Article] http://ecite.utas.edu.au/86944 Earth Sciences Physical Geography and Environmental Geoscience Glaciology Refereed Article PeerReviewed 2013 ftunivtasecite https://doi.org/10.3189/2013JoG12J113 2019-12-13T21:50:53Z Remote sensing of ice motion by tracking displacement of surface features is a valuable tool in glaciology. Efficient image feature-tracking programs, such as IMCORR, based on fast Fourier transform methods can produce misleading correlations if there are data gaps in either or both of the reference and search images. This is particularly problematic if the data gaps are regular in character, such as for Landsat7 images collected after the failure of the Scan Line Corrector (SLC-off images). We demonstrate that this situation can be alleviated by filling the data gaps with suitably chosen random data. We modified IMCORR to achieve this automatically (source code is included), but generic image-processing software could be used to modify inputs for other correlation packages. We test our method using images of Pine Island Ice Shelf, Antarctica, and document the acceleration of the velocity field for the floating extension of Pine Island Glacier over the decade 200111. We also combine our velocities with recent NASA Operation IceBridge ice thickness data from CReSIS to estimate the basal melt rates. Article in Journal/Newspaper Antarc* Antarctica Ice Shelf Journal of Glaciology Pine Island Pine Island Glacier eCite UTAS (University of Tasmania) Pine Island Glacier ENVELOPE(-101.000,-101.000,-75.000,-75.000) Journal of Glaciology 59 215 571 582 |
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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 Warner, RC Roberts, JL Pine Island Glacier (Antarctica) velocities from Landsat7 images between 2001 and 2011: FFT-based image correlation for images with data gaps |
topic_facet |
Earth Sciences Physical Geography and Environmental Geoscience Glaciology |
description |
Remote sensing of ice motion by tracking displacement of surface features is a valuable tool in glaciology. Efficient image feature-tracking programs, such as IMCORR, based on fast Fourier transform methods can produce misleading correlations if there are data gaps in either or both of the reference and search images. This is particularly problematic if the data gaps are regular in character, such as for Landsat7 images collected after the failure of the Scan Line Corrector (SLC-off images). We demonstrate that this situation can be alleviated by filling the data gaps with suitably chosen random data. We modified IMCORR to achieve this automatically (source code is included), but generic image-processing software could be used to modify inputs for other correlation packages. We test our method using images of Pine Island Ice Shelf, Antarctica, and document the acceleration of the velocity field for the floating extension of Pine Island Glacier over the decade 200111. We also combine our velocities with recent NASA Operation IceBridge ice thickness data from CReSIS to estimate the basal melt rates. |
format |
Article in Journal/Newspaper |
author |
Warner, RC Roberts, JL |
author_facet |
Warner, RC Roberts, JL |
author_sort |
Warner, RC |
title |
Pine Island Glacier (Antarctica) velocities from Landsat7 images between 2001 and 2011: FFT-based image correlation for images with data gaps |
title_short |
Pine Island Glacier (Antarctica) velocities from Landsat7 images between 2001 and 2011: FFT-based image correlation for images with data gaps |
title_full |
Pine Island Glacier (Antarctica) velocities from Landsat7 images between 2001 and 2011: FFT-based image correlation for images with data gaps |
title_fullStr |
Pine Island Glacier (Antarctica) velocities from Landsat7 images between 2001 and 2011: FFT-based image correlation for images with data gaps |
title_full_unstemmed |
Pine Island Glacier (Antarctica) velocities from Landsat7 images between 2001 and 2011: FFT-based image correlation for images with data gaps |
title_sort |
pine island glacier (antarctica) velocities from landsat7 images between 2001 and 2011: fft-based image correlation for images with data gaps |
publisher |
Int Glaciol Soc |
publishDate |
2013 |
url |
https://doi.org/10.3189/2013JoG12J113 http://ecite.utas.edu.au/86944 |
long_lat |
ENVELOPE(-101.000,-101.000,-75.000,-75.000) |
geographic |
Pine Island Glacier |
geographic_facet |
Pine Island Glacier |
genre |
Antarc* Antarctica Ice Shelf Journal of Glaciology Pine Island Pine Island Glacier |
genre_facet |
Antarc* Antarctica Ice Shelf Journal of Glaciology Pine Island Pine Island Glacier |
op_relation |
http://ecite.utas.edu.au/86944/1/Warner_2013_Pine_Island.pdf http://dx.doi.org/10.3189/2013JoG12J113 Warner, RC and Roberts, JL, Pine Island Glacier (Antarctica) velocities from Landsat7 images between 2001 and 2011: FFT-based image correlation for images with data gaps, Journal of Glaciology, 59, (215) pp. 571-582. ISSN 0022-1430 (2013) [Refereed Article] http://ecite.utas.edu.au/86944 |
op_doi |
https://doi.org/10.3189/2013JoG12J113 |
container_title |
Journal of Glaciology |
container_volume |
59 |
container_issue |
215 |
container_start_page |
571 |
op_container_end_page |
582 |
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1766091013455085568 |