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A new high-resolution elevation model of Greenland derived from TanDEM-X

Wessel, Birgit and Bertram, Adina and Gruber, Astrid and Bemm, Stefan and Dech, Stefan (2016) A new high-resolution elevation model of Greenland derived from TanDEM-X. In: ISPRS Ann. of Photogramm. Remote Sens. Spatial Inf. Sci., III-7, pp. 9-16. XXIII ISPRS Congress, 12.-19. Jul. 2016, Prague, Czech Republic.

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Official URL: http://www.isprs-ann-photogramm-remote-sens-spatial-inf-sci.net/III-7/9/2016/isprs-annals-III-7-9-2016.pdf

Abstract

In this paper we present for the first time the new digital elevation model (DEM) for Greenland produced by the TanDEM-X (TerraSAR add-on for digital elevation measurement) mission. The new, full coverage DEM of Greenland has a resolution of 0.4 arc seconds corresponding to 12 m. It is composed of more than 7.000 interferometric synthetic aperture radar (InSAR) DEM scenes. X- Band SAR penetrates the snow and ice pack by several meters depending on the structures within the snow, the acquisition parameters, and the dielectricity constant of the medium. Hence, the resulting SAR measurements do not represent the surface but the elevation of the mean phase center of the backscattered signal. Special adaptations on the nominal TanDEM-X DEM generation are conducted to maintain these characteristics and not to raise or even deform the DEM to surface reference data. For the block adjustment, only on the outer coastal regions ICESat (Ice, Cloud, and land Elevation Satellite) elevations as ground control points (GCPs) are used where mostly rock and surface scattering predominates. Comparisons with ICESat data and snow facies are performed. In the inner ice and snow pack, the final X-Band InSAR DEM of Greenland lies up to 10 m below the ICESat measurements. At the outer coastal regions it corresponds well with the GCPs. The resulting DEM is outstanding due to its resolution, accuracy and full coverage. It provides a high resolution dataset as basis for research on climate change in the arctic.

Item URL in elib:https://elib.dlr.de/107017/
Document Type:Conference or Workshop Item (Speech)
Title:A new high-resolution elevation model of Greenland derived from TanDEM-X
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Wessel, BirgitBirgit.Wessel (at) dlr.deUNSPECIFIED
Bertram, AdinaSachverständigenbüro für Luftbildauswertung und Umweltfragen (SLU)UNSPECIFIED
Gruber, AstridAstrid.Gruber (at) dlr.deUNSPECIFIED
Bemm, StefanSachverständigenbüro für Luftbildauswertung und Umweltfragen (SLU)UNSPECIFIED
Dech, Stefanstefan.dech (at) dlr.deUNSPECIFIED
Date:2016
Journal or Publication Title:ISPRS Ann. of Photogramm. Remote Sens. Spatial Inf. Sci.
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:III-7
Page Range:pp. 9-16
Status:Published
Keywords:DEM, Greenland, TanDEM-X, ICESat, Penetration depth, block adjustment
Event Title:XXIII ISPRS Congress
Event Location:Prague, Czech Republic
Event Type:international Conference
Event Dates:12.-19. Jul. 2016
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Projekt TanDEM-X
Location: Oberpfaffenhofen
Institutes and Institutions:German Remote Sensing Data Center > Land Surface
Deposited By: Wessel, Dr.-Ing. Birgit
Deposited On:23 Nov 2016 11:31
Last Modified:31 Jul 2019 20:04

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