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dc.contributor.author
Leinss, Silvan
dc.contributor.author
Bernhard, Philipp
dc.date.accessioned
2021-08-27T06:50:32Z
dc.date.available
2021-08-27T06:50:32Z
dc.date.issued
2021
dc.identifier.issn
1939-1404
dc.identifier.issn
2151-1535
dc.identifier.other
10.1109/jstars.2021.3078084
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/502463
dc.identifier.doi
10.3929/ethz-b-000483720
dc.description.abstract
Great Aletsch Glacier (Grosser Aletschgletscher), the largest glacier in the European Alps, contains 20% of the entire Swiss ice mass. Therefore, it has been selected as a super-testsite for the TanDEM-X satellite mission. Dense time series with a repeat interval down to 11 d were acquired between 2011 and 2019 using two polarizations (HH and VV) and across-track baselines of 0–1 km. To evaluate the use of interferometric single-pass synthetic aperture radar mission for glaciological applications, we implemented a processing pipeline in interactive data language (IDL) and computed 130 digital elevation models (DEMs) from bistatic radar interferograms. We present a method to circumvent a common pitfall during orthorectification of radar DEM differences. Regression analysis of DEM time series shows a height loss of up to 8 m a −1 on the tongue and 1.5 m a −1 when averaged over the whole glacier area. In spring 2013, we observed X-band penetration depths of 4 ± 2 m in the accumulation area. For strongly crevassed areas, the coherence drops already to 0.5 for across-track baselines B⊥> 200 m. With patch-based incoherent offset tracking, we obtained an almost complete 200 m resolution velocity map. Velocities reach up to 0.8 m d −1 , show a seasonal variability of ± 0.05 m d −1 , and agree within 0.04 m d −1 (root mean square error) with field measurements. Copolar phase differences suggest an approximation of snow accumulation. We demonstrate orthorectification of the backscatter intensity using simultaneously acquired TanDEM-X interferograms, which allows for the decoupling of horizontal velocity estimates from phase-center height changes due to penetration and ice melt.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
IEEE
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.subject
Common-band filter
en_US
dc.subject
Copolar phase difference (CPD)
en_US
dc.subject
Digital elevation model (DEM)
en_US
dc.subject
DEM differencing
en_US
dc.subject
Geocoding
en_US
dc.subject
Great Aletsch Glacier
en_US
dc.subject
Offset tracking
en_US
dc.subject
Orthorectification
en_US
dc.subject
Single pass radar interferometry
en_US
dc.subject
TanDEM-X
en_US
dc.subject
Velocity
en_US
dc.subject
Wave number shift
en_US
dc.title
TanDEM-X: Deriving InSAR Height Changes and Velocity Dynamics of Great Aletsch Glacier
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
2021-05-06
ethz.journal.title
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
ethz.journal.volume
14
en_US
ethz.journal.abbreviated
IEEE j. sel. top. appl. earth obs. remote sens.
ethz.pages.start
4798
en_US
ethz.pages.end
4815
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.publication.place
New York, NY
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02115 - Dep. Bau, Umwelt und Geomatik / Dep. of Civil, Env. and Geomatic Eng.::02608 - Institut für Umweltingenieurwiss. / Institute of Environmental Engineering::03849 - Hajnsek, Irena / Hajnsek, Irena
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02115 - Dep. Bau, Umwelt und Geomatik / Dep. of Civil, Env. and Geomatic Eng.::02608 - Institut für Umweltingenieurwiss. / Institute of Environmental Engineering::03849 - Hajnsek, Irena / Hajnsek, Irena
en_US
ethz.relation.isSupplementedBy
20.500.11850/482456
ethz.date.deposited
2021-05-11T11:48:36Z
ethz.source
WOS
ethz.source
FORM
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2021-08-27T06:50:42Z
ethz.rosetta.lastUpdated
2022-03-29T11:20:01Z
ethz.rosetta.versionExported
true
dc.identifier.olduri
http://hdl.handle.net/20.500.11850/494761
dc.identifier.olduri
http://hdl.handle.net/20.500.11850/483720
ethz.COinS
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