21 December 1994 Development of a real-time airborne SAR processor using a subaperture approach
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This paper presents the conceptual design, performance analysis and results of the high resolution real-time processor integrated in the experimental airborne SAR-system of the DLR. A Real-Time Subaperture (RTS) approach, which is suitable for airborne real-time SAR processing, was chosen for the hardware implementation. A new approach for high squint SAR processing is adopted, which consists basically of performing a 1D azimuth compression followed by a 2D convolution with a correction function. The main advantages of this approach are the simple hardware implementation, reduced computational and memory requirements and efficient time-domain correction of the range migration. Dedicated on- board hardware, which consists of high speed digital signal processors, programmable logic devices and other integrated circuits, was developed at DLR. The on-board hardware has been successfully tested. The results of the first flight tests in the area of Oberpfaffenhofen (Germany) are shown.
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Rainer Spielbauer, Alberto Moreira, Winfried Poetzsch, "Development of a real-time airborne SAR processor using a subaperture approach", Proc. SPIE 2316, SAR Data Processing for Remote Sensing, (21 December 1994); doi: 10.1117/12.197546; https://doi.org/10.1117/12.197546

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