星載SAR數(shù)據(jù)成像的并行和實(shí)時(shí)處理研究曙光機(jī)的應(yīng)用實(shí)例
STUDY OF PARALLEL AND IN TIME PROCESSING FOR DATA IMAGING OF SPACEBORNE SAR
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摘要: 星載合成孔徑雷達(dá)成像數(shù)據(jù)量大,實(shí)時(shí)性要求高。該文闡述在曙光2000-Ⅱ型巨型并行計(jì)算機(jī)上完成星載合成孔徑雷達(dá)CS算法的并行處理。并利用該并行機(jī)完成了對CS算法的實(shí)時(shí)成像系統(tǒng)并行化結(jié)構(gòu)的系統(tǒng)仿真。實(shí)驗(yàn)結(jié)果表明該文提出的并行算法可在曙光2000-Ⅱ型巨型并行計(jì)算機(jī)上獲得很好的效果。Abstract: 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-Ⅱwhich 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-Ⅱ.
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張澄波,綜合孔徑雷達(dá)原理、系統(tǒng)分析和應(yīng)用,北京,科學(xué)出版社,1989,第1章.[2]MPI:A Message-Passmg Interface Standard,May,5,1994[3]湯振宇,合成孔徑雷達(dá)的系統(tǒng)設(shè)計(jì)和線性調(diào)頻脈沖串工作新模式,[碩士論文]中科院電子所,1999.第4章.[4]A.V.奧本海姆,董士嘉,等譯,數(shù)字信號處理,北京,科學(xué)出版社,1980,第3章,第8節(jié).[5]RADDARSAT Dara Products Specifications,Nov.7,1997. -
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