TerraSAR-X and TanDEM-X, commercial German synthetic aperture radar (SAR) Earth observation satellites which were launched in 2007 and 2010 respectively. 29 Apr 2014|Kristy Bryden SHARE Share to Facebook Share to Twitter Share to LinkedIn Share to Email Print This Post With ImagesWithout Images Share SHARE Share to Facebook Share to Twitter Share to LinkedIn Share to Email Print This Post With ImagesWithout Images