 |  German satellites sense Earth’s lumps and bumps
 12 October 2018
The German space agency (DLR) has released a spectacular 3D map of Earth made by
satellites TerraSAR-X and TanDEM-X. Built from images acquired by the two radar
satellites, it traces the variations in height across all land surfaces - an area totalling
more than 148 million sq km. DLR is making the map free and open, enabling any
scientist to download and use it.
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