A new DEM of the Austfonna ice cap by combining differential SAR interferometry with ICESat laser altimetry
We present a new digital elevation model (DEM) of the Austfonna ice cap in the Svalbard Archipelago, Norwegian Arctic. Previous DEMs derived from synthetic aperture radar (SAR) and optical shape-from-shading have been tied to airborne radio echo-sounding surface profiles from 1983 which contain an e...
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Norwegian Polar Institute
2012
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Online Access: | https://doi.org/10.3402/polar.v31i0.18460 https://doaj.org/article/83ca227da0ab4d93b653a0c0d35000f5 |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:83ca227da0ab4d93b653a0c0d35000f5 2023-05-15T15:10:13+02:00 A new DEM of the Austfonna ice cap by combining differential SAR interferometry with ICESat laser altimetry Geir Moholdt Andreas Kääb 2012-05-01 https://doi.org/10.3402/polar.v31i0.18460 https://doaj.org/article/83ca227da0ab4d93b653a0c0d35000f5 en eng Norwegian Polar Institute doi:10.3402/polar.v31i0.18460 0800-0395 1751-8369 https://doaj.org/article/83ca227da0ab4d93b653a0c0d35000f5 undefined Polar Research, Vol 31, Iss 0, Pp 1-11 (2012) SAR ICESat DEM Austfonna ice cap glacier geo archeo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2012 fttriple https://doi.org/10.3402/polar.v31i0.18460 2023-01-22T19:22:57Z We present a new digital elevation model (DEM) of the Austfonna ice cap in the Svalbard Archipelago, Norwegian Arctic. Previous DEMs derived from synthetic aperture radar (SAR) and optical shape-from-shading have been tied to airborne radio echo-sounding surface profiles from 1983 which contain an elevation-dependent bias of up to several tens of metres compared with recent elevation data. The new and freely available DEM is constructed purely from spaceborne remote sensing data using differential SAR interferometry (DInSAR) in combination with ICESat laser altimetry. Interferograms were generated from pairs of SAR scenes from the one-day repeat tandem phase of the European Remote Sensing Satellites 1/2 (ERS-1/2) in 1996. ICESat elevations from winter 2006–08 were used as ground control points to refine the interferometric baseline. The resulting DEM is validated against the same ground control points and independent surface elevation profiles from Global Navigation Satellite Systems (GNSS) and airborne laser altimetry, yielding root mean square (RMS) errors of about 10 m in all cases. This quality is sufficient for most glaciological applications, and the new DEM will be a baseline data set for ongoing and future research at Austfonna. The technique of combining satellite DInSAR with high-resolution satellite altimetry for DEM generation might also be a good solution in other glacier regions with similar characteristics, especially when data from TanDEM-X and CryoSat-2 become available. Article in Journal/Newspaper Arctic Austfonna glacier Ice cap Polar Research Svalbard Unknown Arctic Austfonna ENVELOPE(24.559,24.559,79.835,79.835) Svalbard Svalbard Archipelago Polar Research 31 1 18460 |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
SAR ICESat DEM Austfonna ice cap glacier geo archeo |
spellingShingle |
SAR ICESat DEM Austfonna ice cap glacier geo archeo Geir Moholdt Andreas Kääb A new DEM of the Austfonna ice cap by combining differential SAR interferometry with ICESat laser altimetry |
topic_facet |
SAR ICESat DEM Austfonna ice cap glacier geo archeo |
description |
We present a new digital elevation model (DEM) of the Austfonna ice cap in the Svalbard Archipelago, Norwegian Arctic. Previous DEMs derived from synthetic aperture radar (SAR) and optical shape-from-shading have been tied to airborne radio echo-sounding surface profiles from 1983 which contain an elevation-dependent bias of up to several tens of metres compared with recent elevation data. The new and freely available DEM is constructed purely from spaceborne remote sensing data using differential SAR interferometry (DInSAR) in combination with ICESat laser altimetry. Interferograms were generated from pairs of SAR scenes from the one-day repeat tandem phase of the European Remote Sensing Satellites 1/2 (ERS-1/2) in 1996. ICESat elevations from winter 2006–08 were used as ground control points to refine the interferometric baseline. The resulting DEM is validated against the same ground control points and independent surface elevation profiles from Global Navigation Satellite Systems (GNSS) and airborne laser altimetry, yielding root mean square (RMS) errors of about 10 m in all cases. This quality is sufficient for most glaciological applications, and the new DEM will be a baseline data set for ongoing and future research at Austfonna. The technique of combining satellite DInSAR with high-resolution satellite altimetry for DEM generation might also be a good solution in other glacier regions with similar characteristics, especially when data from TanDEM-X and CryoSat-2 become available. |
format |
Article in Journal/Newspaper |
author |
Geir Moholdt Andreas Kääb |
author_facet |
Geir Moholdt Andreas Kääb |
author_sort |
Geir Moholdt |
title |
A new DEM of the Austfonna ice cap by combining differential SAR interferometry with ICESat laser altimetry |
title_short |
A new DEM of the Austfonna ice cap by combining differential SAR interferometry with ICESat laser altimetry |
title_full |
A new DEM of the Austfonna ice cap by combining differential SAR interferometry with ICESat laser altimetry |
title_fullStr |
A new DEM of the Austfonna ice cap by combining differential SAR interferometry with ICESat laser altimetry |
title_full_unstemmed |
A new DEM of the Austfonna ice cap by combining differential SAR interferometry with ICESat laser altimetry |
title_sort |
new dem of the austfonna ice cap by combining differential sar interferometry with icesat laser altimetry |
publisher |
Norwegian Polar Institute |
publishDate |
2012 |
url |
https://doi.org/10.3402/polar.v31i0.18460 https://doaj.org/article/83ca227da0ab4d93b653a0c0d35000f5 |
long_lat |
ENVELOPE(24.559,24.559,79.835,79.835) |
geographic |
Arctic Austfonna Svalbard Svalbard Archipelago |
geographic_facet |
Arctic Austfonna Svalbard Svalbard Archipelago |
genre |
Arctic Austfonna glacier Ice cap Polar Research Svalbard |
genre_facet |
Arctic Austfonna glacier Ice cap Polar Research Svalbard |
op_source |
Polar Research, Vol 31, Iss 0, Pp 1-11 (2012) |
op_relation |
doi:10.3402/polar.v31i0.18460 0800-0395 1751-8369 https://doaj.org/article/83ca227da0ab4d93b653a0c0d35000f5 |
op_rights |
undefined |
op_doi |
https://doi.org/10.3402/polar.v31i0.18460 |
container_title |
Polar Research |
container_volume |
31 |
container_issue |
1 |
container_start_page |
18460 |
_version_ |
1766341255645626368 |