Mapping ice-shelf flow with interferometric synthetic aperture radar stacking
Interferometric synthetic aperture radar (InSAR) observations of ice-shelf flow contain ocean-tide and atmospheric-pressure signals. A model-based correction can be applied, but this method is limited by its dependency upon model accuracy, which in remote regions can be uncertain. Here we describe a...
Published in: | Journal of Glaciology |
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ftulancaster:oai:eprints.lancs.ac.uk:79034 2023-08-27T04:05:21+02:00 Mapping ice-shelf flow with interferometric synthetic aperture radar stacking Mcmillan, Malcolm Shepherd, Andrew Gourmelen, Noel Park, Jeong Won Nienow, Peter Rinne, Eero Leeson, Amber 2012-04-01 https://eprints.lancs.ac.uk/id/eprint/79034/ https://doi.org/10.3189/2012JoG11J072 unknown Mcmillan, Malcolm and Shepherd, Andrew and Gourmelen, Noel and Park, Jeong Won and Nienow, Peter and Rinne, Eero and Leeson, Amber (2012) Mapping ice-shelf flow with interferometric synthetic aperture radar stacking. Journal of Glaciology, 58 (208). pp. 265-277. ISSN 0022-1430 Journal Article PeerReviewed 2012 ftulancaster https://doi.org/10.3189/2012JoG11J072 2023-08-03T22:29:11Z Interferometric synthetic aperture radar (InSAR) observations of ice-shelf flow contain ocean-tide and atmospheric-pressure signals. A model-based correction can be applied, but this method is limited by its dependency upon model accuracy, which in remote regions can be uncertain. Here we describe a method to determine two-dimensional ice-shelf flow vectors independently of model predictions of tide and atmospheric pressure, by stacking conventional and multiple aperture InSAR (MAI) observations of the Dotson Ice Shelf, West Antarctica. In this way we synthesize a longer observation period, which enhances long-period (flow) displacement signals, relative to rapidly varying (tide and atmospheric pressure) signals and noise.We estimate the error associated with each component of the velocity field to be ~22ma -1, which could be further reduced if more images were available to stack. With the upcoming launch of several satellite missions, offering the prospect of regular short-repeat SAR acquisitions, this study demonstrates that stacking can improve estimates of ice-shelf flow velocity. Article in Journal/Newspaper Antarc* Antarctica Dotson Ice Shelf Ice Shelf Journal of Glaciology West Antarctica Lancaster University: Lancaster Eprints Dotson Ice Shelf ENVELOPE(-112.367,-112.367,-74.400,-74.400) West Antarctica Journal of Glaciology 58 208 265 277 |
institution |
Open Polar |
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Lancaster University: Lancaster Eprints |
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ftulancaster |
language |
unknown |
description |
Interferometric synthetic aperture radar (InSAR) observations of ice-shelf flow contain ocean-tide and atmospheric-pressure signals. A model-based correction can be applied, but this method is limited by its dependency upon model accuracy, which in remote regions can be uncertain. Here we describe a method to determine two-dimensional ice-shelf flow vectors independently of model predictions of tide and atmospheric pressure, by stacking conventional and multiple aperture InSAR (MAI) observations of the Dotson Ice Shelf, West Antarctica. In this way we synthesize a longer observation period, which enhances long-period (flow) displacement signals, relative to rapidly varying (tide and atmospheric pressure) signals and noise.We estimate the error associated with each component of the velocity field to be ~22ma -1, which could be further reduced if more images were available to stack. With the upcoming launch of several satellite missions, offering the prospect of regular short-repeat SAR acquisitions, this study demonstrates that stacking can improve estimates of ice-shelf flow velocity. |
format |
Article in Journal/Newspaper |
author |
Mcmillan, Malcolm Shepherd, Andrew Gourmelen, Noel Park, Jeong Won Nienow, Peter Rinne, Eero Leeson, Amber |
spellingShingle |
Mcmillan, Malcolm Shepherd, Andrew Gourmelen, Noel Park, Jeong Won Nienow, Peter Rinne, Eero Leeson, Amber Mapping ice-shelf flow with interferometric synthetic aperture radar stacking |
author_facet |
Mcmillan, Malcolm Shepherd, Andrew Gourmelen, Noel Park, Jeong Won Nienow, Peter Rinne, Eero Leeson, Amber |
author_sort |
Mcmillan, Malcolm |
title |
Mapping ice-shelf flow with interferometric synthetic aperture radar stacking |
title_short |
Mapping ice-shelf flow with interferometric synthetic aperture radar stacking |
title_full |
Mapping ice-shelf flow with interferometric synthetic aperture radar stacking |
title_fullStr |
Mapping ice-shelf flow with interferometric synthetic aperture radar stacking |
title_full_unstemmed |
Mapping ice-shelf flow with interferometric synthetic aperture radar stacking |
title_sort |
mapping ice-shelf flow with interferometric synthetic aperture radar stacking |
publishDate |
2012 |
url |
https://eprints.lancs.ac.uk/id/eprint/79034/ https://doi.org/10.3189/2012JoG11J072 |
long_lat |
ENVELOPE(-112.367,-112.367,-74.400,-74.400) |
geographic |
Dotson Ice Shelf West Antarctica |
geographic_facet |
Dotson Ice Shelf West Antarctica |
genre |
Antarc* Antarctica Dotson Ice Shelf Ice Shelf Journal of Glaciology West Antarctica |
genre_facet |
Antarc* Antarctica Dotson Ice Shelf Ice Shelf Journal of Glaciology West Antarctica |
op_relation |
Mcmillan, Malcolm and Shepherd, Andrew and Gourmelen, Noel and Park, Jeong Won and Nienow, Peter and Rinne, Eero and Leeson, Amber (2012) Mapping ice-shelf flow with interferometric synthetic aperture radar stacking. Journal of Glaciology, 58 (208). pp. 265-277. ISSN 0022-1430 |
op_doi |
https://doi.org/10.3189/2012JoG11J072 |
container_title |
Journal of Glaciology |
container_volume |
58 |
container_issue |
208 |
container_start_page |
265 |
op_container_end_page |
277 |
_version_ |
1775357032179695616 |