Tandem-L: Global Monitoring the Earth's Dynamics with Differential and Polarimetric SAR Interferometry

Tandem-L is a German mission proposal for an innovative interferometric L-band radar mission that enables the systematic monitoring of dynamic Earth processes using advanced techniques and technologies. The Tandem-L mission concept consists of two cooperating satellites flying in close formation. The single-pass imaging mode for polarimetric SAR interferometry and the repeatpass acquisition mode for differential interferometry provide a unique data source to observe, analyse and quantify a wide range of mutually interacting processes in the bio-, geo-, hydroand cryosphere. The systematic observation of these processes benefits from the high data acquisition capacity and the novel high-resolution wide-swath SAR imaging modes that combine digital beamforming with a large reflector antenna. This paper provides an overview of the Tandem-L mission concept and its main application areas.