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TanDEM-X is DLR (Deutsches Zentrum für Luft- und Raumfahrt) the Earth surface observation project using high-resolution SAR interferometry. It opens a new era in space borne radar remote sensing. The system is based on two satellites: TerraSAR-X (TSX) and TanDEM-X (TDX) flying on the very close, strictly controlled orbits. This paper gives an overview of the radar technology and overview of the TanDEM-X mission concept which is based on several innovative technologies. The primary objective of the mission is to deliver a global digital elevation model (DEM) with an unprecedented accuracy, which is equal to or surpass the HRTI-3 specifications (12 m posting, relative height accuracy ±2 m for slope &lt; 20% and ±4 m for slope &gt; 20% [8]). Beyond that, TanDEM-X provides a highly reconfigurable platform for the demonstration of new radar imaging techniques and applications.[b]Keywords[/b]: remote sensing, Bistatic SAR, digital elevation model (DEM), Helix formation, SAR interferomery, HRTI-3, synchronizatio

Projekt TanDEM-X radarowych obserwacji powierzchni Ziemi prowadzonych z pułapu satelitarnego - założenia i status misji