Long term system monitoring status of the TerraSARA and the TanDEMA satellites

The TerraSAR-X and the TanDEM-X satellites are operated to enable two missions in parallel: the TerraSAR-X and the TanDEM-X missions for scientific and commercial applications providing a multitude of SAR products of high accuracy and reliability. After launch the whole SAR system has been successfully calibrated and verified for both satellites during their commissioning phases: the TerraSAR-X in 2007 and the TanDEM-X in 2010. In order to guarantee a stable quality of the excellent SAR products and to monitor the correct operation of the entire SAR systems, both systems are regularly monitored. This paper presents the status and results of all long-term system monitoring (LTSM) tasks executed since launch.