Reconstruction methods of missing SAR data: Analysis in the frame of TanDEM-X synchronization link

The reconstruction of corrupted or missing data is a conventional problem in image and audio processing, but has only raised moderate attention in the SAR community. In the frame of the TanDEM-X mission, the cooperative operation of the bistatic system requires the exchange of information between transmitter and receiver during the acquisition time in order to gather calibration and sync information. Therefore, the reception of SAR signal is periodically interrupted according to the synchronization link frequency and artifacts appear in the focused image. The data corruption is especially problematic when acquiring close to the Nyquist rate.