a1 Institut für Hochfrequenztechnik und Radarsysteme, Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR), Münchner Straße 20, D-82234 Weßling, Germany. Phone: 08153-28-3343; Fax: 08153-28-1135.
TanDEM-X (TDX; TerraSAR-X add-on for digital elevation measurement) is an innovative spaceborne X-band earth observation mission that will be launched in June 2010. This paper gives an overview of the TDX mission concept, summarizes the basic products and illustrates the achievable performance. In more detail the effect of quantization on the interferometric performance is discussed. Finally, new imaging techniques are outlined.
(Received December 23 2009)
(Revised April 30 2010)
(Online publication July 07 2010)