星载SAR数据成像的并行和实时处理研究——曙光机的应用实例

STUDY OF PARALLEL AND IN TIME PROCESSING FOR DATA IMAGING OF SPACEBORNE SAR

星载合成孔径雷达成像数据量大,实时性要求高。该文阐述在曙光2000-Ⅱ型巨型并行计算机上完成星载合成孔径雷达CS算法的并行处理。并利用该并行机完成了对CS算法的实时成像系统并行化结构的系统仿真。实验结果表明该文提出的并行算法可在曙光2000-Ⅱ型巨型并行计算机上获得很好的效果。

The image processing of spaceborne Synthetic Aperture Radar (SAR) needs to process enormous amount of data and should accomplish the processing a.s soon as possible, hi order to increase the speed of SAR image processing, the paper presents the Chirp Scaling (CS) algorithm in parallel mode for the Dawn 2000-11 which is a grand parallel computer. The paper also simulates the real time imaging system, which will work on satellite, and modifies the structure of the real time system according to the results of the simulation. The experiment proves that the parallel CS algorithm provided in the paper can get satisfying results on Dawn 2000-11.