TanDEM-X first DEM acquisition
A crossing orbit experiment
Paco Dekker (Deutsches Zentrum für Luft- und Raumfahrt (DLR))
Pau Prats-Iraola (Deutsches Zentrum für Luft- und Raumfahrt (DLR))
Francesco De Zan (Deutsches Zentrum für Luft- und Raumfahrt (DLR))
Daniel Schulze (Deutsches Zentrum für Luft- und Raumfahrt (DLR))
Gerhard Krieger (Deutsches Zentrum für Luft- und Raumfahrt (DLR))
A Moreira (Deutsches Zentrum für Luft- und Raumfahrt (DLR))
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Abstract
This letter describes the first interferometric acquisitions and results obtained by the TerraSAR-X add-on for Digital Elevation Measurements mission. Due to the large along-track separation between the two satellites during the approaching maneuver and the Earth's rotation, useful interferometric acquisitions were only possible at high latitudes. This resulted in a crossing angle between the ground tracks whose impact was corrected by acquiring the two synthetic-aperture radar images with an opposite squint. The still very large 2-km cross-track baseline resulted in a 3.8-m interferometric height of ambiguity, producing extremely detailed images of the topography of the target area. Results acquired over the October Revolution Island, Russia, are shown and discussed.
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