Determination of variations in glacier surface movements through high resolution interferometry: Bylot Island
ABSTRACT Interferograms were generated from 10 TerraSAR-X image pairs, with the objective of obtaining estimates of winter surface motion for a slow-moving polythermal arctic glacier. Flow directions were computed using both ascending and descending-pass interferograms for each period, with the medi...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.1062.6288 2023-05-15T15:03:15+02:00 Determination of variations in glacier surface movements through high resolution interferometry: Bylot Island B.J K Whitehead P Moorman Wainstein The Pennsylvania State University CiteSeerX Archives 2009 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1062.6288 http://people.ucalgary.ca/%7Ekwhitehe/05418050.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1062.6288 http://people.ucalgary.ca/%7Ekwhitehe/05418050.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://people.ucalgary.ca/%7Ekwhitehe/05418050.pdf text 2009 ftciteseerx 2020-04-19T00:22:26Z ABSTRACT Interferograms were generated from 10 TerraSAR-X image pairs, with the objective of obtaining estimates of winter surface motion for a slow-moving polythermal arctic glacier. Flow directions were computed using both ascending and descending-pass interferograms for each period, with the median value being adopted as the final direction. The weighted average flow was computed, with weighting based on the inverse of the difference between the ascending and descending-pass displacement estimates for each date. This study uses multiple interferograms with different imaging geometries to provide estimates of down-glacier flow. The methodology adopted minimizes the effects of glacier / satellite track alignment and those resulting from vertical motion of the glacier surface. Current velocities were compared with flow estimates derived from a 1992 ERS-1 image pair. The velocities were similar over most of the glacier, but current velocities were found to be 30% to 50% lower on the lower glacier. Text Arctic Bylot Island Unknown Arctic Bylot Island |
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Open Polar |
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Unknown |
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ftciteseerx |
language |
English |
description |
ABSTRACT Interferograms were generated from 10 TerraSAR-X image pairs, with the objective of obtaining estimates of winter surface motion for a slow-moving polythermal arctic glacier. Flow directions were computed using both ascending and descending-pass interferograms for each period, with the median value being adopted as the final direction. The weighted average flow was computed, with weighting based on the inverse of the difference between the ascending and descending-pass displacement estimates for each date. This study uses multiple interferograms with different imaging geometries to provide estimates of down-glacier flow. The methodology adopted minimizes the effects of glacier / satellite track alignment and those resulting from vertical motion of the glacier surface. Current velocities were compared with flow estimates derived from a 1992 ERS-1 image pair. The velocities were similar over most of the glacier, but current velocities were found to be 30% to 50% lower on the lower glacier. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
B.J K Whitehead P Moorman Wainstein |
spellingShingle |
B.J K Whitehead P Moorman Wainstein Determination of variations in glacier surface movements through high resolution interferometry: Bylot Island |
author_facet |
B.J K Whitehead P Moorman Wainstein |
author_sort |
B.J K Whitehead |
title |
Determination of variations in glacier surface movements through high resolution interferometry: Bylot Island |
title_short |
Determination of variations in glacier surface movements through high resolution interferometry: Bylot Island |
title_full |
Determination of variations in glacier surface movements through high resolution interferometry: Bylot Island |
title_fullStr |
Determination of variations in glacier surface movements through high resolution interferometry: Bylot Island |
title_full_unstemmed |
Determination of variations in glacier surface movements through high resolution interferometry: Bylot Island |
title_sort |
determination of variations in glacier surface movements through high resolution interferometry: bylot island |
publishDate |
2009 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1062.6288 http://people.ucalgary.ca/%7Ekwhitehe/05418050.pdf |
geographic |
Arctic Bylot Island |
geographic_facet |
Arctic Bylot Island |
genre |
Arctic Bylot Island |
genre_facet |
Arctic Bylot Island |
op_source |
http://people.ucalgary.ca/%7Ekwhitehe/05418050.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1062.6288 http://people.ucalgary.ca/%7Ekwhitehe/05418050.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766335125878996992 |