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TanDEM-X: Stereo view of the Earth



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TanDEM-X: Stereo view of the Earth
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The TanDEM-X mission (TerraSAR-X add-on for Digital Elevation Measurement), scheduled to be launched in September, is based on two almost identical Earth observation satellites: TerraSAR-X and TanDEM-X. Both satellites are equipped with a powerful modern radar system, the Synthetic Aperture Radar (SAR). Using SAR, it is possible to observe the Earth not just in daylight, but also at night and in overcast conditions. Just like the two eyes of human beings enable them to perceive the world in three dimensions, TanDEM-X's two SAR antennas will enable it to generate a three-dimensional high-resolution elevation model of the entire surface of the Earth.

Credit: DLR.