星載ScanSAR工作模式研究與設(shè)計(jì)
Studies and design on space-borne ScanSAR system
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摘要: 該文系統(tǒng)地闡述了星載ScanSAR系統(tǒng)的基本工作原理,由ScanSAR系統(tǒng)的空間幾何模型,確定了ScanSAR系統(tǒng)各子條帶的空間位置,研究了ScanSAR系統(tǒng)的方位分辨率問題,確定了ScanSAR系統(tǒng)工作的時(shí)間關(guān)系,各子條帶的脈沖重復(fù)頻率的選擇及每個(gè)burst的樣本數(shù),為系統(tǒng)設(shè)計(jì)提供了依據(jù)。重點(diǎn)研究了 ScanSAR系統(tǒng)的信噪比及距離模糊問題,提出了一種新的 ScanSAR系統(tǒng)特有的模糊概念A(yù)RASR,并提出新的分析方法,對(duì)其影響做了定量的計(jì)算,最后對(duì) ScanSAR系統(tǒng)的數(shù)據(jù)下載格式提出了建議。Abstract: Based on the principles of the space-borne ScanSAR, some important parameters to define the position of sub-swathes, the timing sequence of the system, the choice of the PRFs, the number of the samples of each burst and the SNR are investigated. Some critical problems about ScanSAR system are discussed, such as the number of the multi-looks, the azimuth resolution and the range ambiguities. A new concept of the range ambiguities is put forward, analyzed and verified. Based on above discussion and calculation, the data format for the practical ScanSAR system is suggested.
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張澄波,綜合孔徑雷達(dá):原理、系統(tǒng)分析與應(yīng)用,北京,科學(xué)出版社,1989,第三章.[2]J.C. Curlander, R. N. McDonough, Synthetic Aperture Radar System and Signal Processing,New York, John Wiley Sons, Inc, 1991, Chapter 1. ［3］G.Franceschetti, R. Lanari, Synthetic Aperture Radar Processing, London, New York, Washing ton D.C., CRC Press, 1999, Chapter 5.[3]A.Curr. M. A. Brown, Wide-swath SAR, IEE Proc.-F, 1992, 139(2), 122-135. -
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