TanDEM-X calibrated Raw DEM generation
Rossi, Cristian and Rodriguez Gonzalez, Fernando and Fritz, Thomas and Yague Martinez, Nestor and Eineder, Michael (2012) TanDEM-X calibrated Raw DEM generation. ISPRS Journal of Photogrammetry and Remote Sensing, 73, pp. 12-20. DOI: 10.1016/j.isprsjprs.2012.05.014.
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The TanDEM-X mission successfully started on June 21st 2010 with the launch of the German radar satellite TDX, placed in orbit in close formation with the TerraSAR-X (TSX) satellite, and establishing the first spaceborne bistatic interferometer. The processing of SAR raw data to the Raw DEM is performed by one single processor, the Integrated TanDEM-X Processor (ITP). The quality of the Raw DEM is a fundamental parameter for the mission planning. In this paper, a novel quality indicator is derived. It is based on the comparison of the interferometric measure, the unwrapped phase, and the stereo-radargrammetric measure, the geometrical shifts computed in the coregistration stage. By stating the accuracy of the unwrapped phase, it constitutes a useful parameter for the determination of problematic scenes, which will be resubmitted to the dual baseline phase unwrapping processing chain for the mitigation of phase unwrapping errors. The stereo-radargrammetric measure is also operationally used for the Raw DEM absolute calibration through an accurate estimation of the absolute phase offset. This paper examines the interferometric algorithms implemented for the operational TanDEM-X Raw DEM generation, focusing particularly on its quality assessment and its calibration.
|Title:||TanDEM-X calibrated Raw DEM generation|
|Journal or Publication Title:||ISPRS Journal of Photogrammetry and Remote Sensing|
|In ISI Web of Science:||Yes|
|Page Range:||pp. 12-20|
|Keywords:||TanDEM-X; Raw DEM; InSAR processing; SAR stereo-radargrammetry; Absolute phase offset estimation; DEM calibration|
|HGF - Research field:||Aeronautics, Space and Transport|
|HGF - Program:||Raumfahrt|
|HGF - Program Themes:||R EO - Erdbeobachtung|
|DLR - Research area:||Raumfahrt|
|DLR - Program:||R EO - Erdbeobachtung|
|DLR - Research theme (Project):||R - Projekt TanDEM-X|
|Institutes and Institutions:||Remote Sensing Technology Institute > SAR Signal Processing|
|Deposited By:||Cristian Rossi|
|Deposited On:||01 Aug 2012 09:16|
|Last Modified:||07 Feb 2013 20:14|
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