Real-Time Video SAR on Curved Trajectories Making Use of Graphic Core Processing

This paper provides a video SAR processing scheme with flexible trajectories along with a brief introduction of the corresponding SAR backprojection approach. For this processing algorithm a Matlab model is introduced and respective aspects for acceleration and robustification of the method are presented, making use of graphic core processing. A processing example of $4096\times 4096$ image pixels with 16384 antenna positions is evaluated with which an acceleration factor of more than 430 is achieved compared to a Matlab implementation. Results of the backprojection implementation are provided with real flight data, acquired using HENSOLDT’s Multifunction Surveillance Radar PrecISR™ 1000 and compared to an $\omega$-k algorithm. A first example of a video SAR processing is finally presented.