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Quality Assessment of the TanDEM-X Global Digital Elevation Model

Bräutigam, Benjamin and Martone, Michele and Rizzoli, Paola and Gonzalez, Carolina and Wecklich, Christopher and Bachmann, Markus and Schulze, Daniel and Zink, Manfred (2015) Quality Assessment of the TanDEM-X Global Digital Elevation Model. In: 36th International Symposium on Remote Sensing of Environment (ISRSE), XL-7/W, pp. 1-4. International Society for Photogrammetry and Remote Sensing. International Symposium on Remote Sensing of Environment (ISRSE), 2015-05-11 - 2015-05-15, Berlin, Germany.

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Abstract

TanDEM-X is an innovative synthetic aperture radar (SAR) mission with the main goal to generate a global and homogeneous digital elevation model (DEM) of the Earth’s land masses. The final DEM product will reach a new dimension of detail with respect to resolution and quality. The absolute horizontal and vertical accuracy shall each be less than 10 m in a 90% confidence interval at a pixel spacing of 12 m. The vertical height specification for the TanDEM-X mission foresees a 90% point-to-point error of 2 m (4 m) for areas with predominant terrain slopes smaller than 20% (greater than 20%) within a 1° longitude by 1° latitude cell. The global DEM is derived from interferometric SAR acquisitions performed by two radar satellites flying in close orbit formation at distances of around 500 m. Interferometric performance parameters like the coherence between the two radar images per acquired scene have been monitored and evaluated throughout the mission. The paper will discuss the derived quality statistics and present global performance maps. The TanDEM-X mission concept foresees multiple coverages of the land masses which will be acquired by end of 2014. In a further step, the over 500,000 single SAR scenes are interferometrically processed, calibrated, and mosaicked into a global DEM product. By end of 2014, about 40% of the global DEM will be available with the full delivery expected early 2016. This paper will present first quality examples of the final DEM product in terms of relative and absolute height accuracy.

Item URL in elib:https://elib.dlr.de/95045/
Document Type:Conference or Workshop Item (Speech)
Title:Quality Assessment of the TanDEM-X Global Digital Elevation Model
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Bräutigam, BenjaminUNSPECIFIEDUNSPECIFIED
Martone, MicheleUNSPECIFIEDUNSPECIFIED
Rizzoli, PaolaUNSPECIFIEDUNSPECIFIED
Gonzalez, CarolinaUNSPECIFIEDUNSPECIFIED
Wecklich, ChristopherUNSPECIFIEDUNSPECIFIED
Bachmann, MarkusUNSPECIFIEDUNSPECIFIED
Schulze, DanielUNSPECIFIEDUNSPECIFIED
Zink, ManfredUNSPECIFIEDUNSPECIFIED
Date:11 May 2015
Journal or Publication Title:36th International Symposium on Remote Sensing of Environment (ISRSE)
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:XL-7/W
Page Range:pp. 1-4
Editors:
EditorsEmail
Schreier, G.UNSPECIFIED
Skrovseth, P. E.UNSPECIFIED
Staudenrausch, H.UNSPECIFIED
Publisher:International Society for Photogrammetry and Remote Sensing
Status:Published
Keywords:Earth Observation, TanDEM-X, SAR Interferometry, Digital Elevation Model
Event Title:International Symposium on Remote Sensing of Environment (ISRSE)
Event Location:Berlin, Germany
Event Type:international Conference
Event Dates:2015-05-11 - 2015-05-15
Organizer:Deutsches Zentrum fuer Luft- und Raumfahrt (DLR)
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:Microwaves and Radar Institute
Microwaves and Radar Institute > Spaceborne SAR Systems
Deposited By: Bräutigam, Benjamin
Deposited On:05 Feb 2015 08:21
Last Modified:28 May 2015 10:13

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