TerraSAR-X Instrument Operations Rooted in the System Engineering and Calibration Project Steinbrecher, Ulrich ; Schulze, Daniel ; Boer, Johannes ; Mittermayer, Josef Abstract Publication: IEEE Transactions on Geoscience and Remote Sensing Pub Date: February 2010 DOI: 10.1109/TGRS.2009.2032177 Bibcode: 2010ITGRS..48..633S