合成孔徑雷達(dá)聚束模式合成孔徑長(zhǎng)度研究
Study on the Synthetic Aperture Length of SAR Working on Spotlight Mode
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摘要: 該文首先給出了傳統(tǒng)聚束SAR合成孔徑長(zhǎng)度計(jì)算公式并指出了其局限性,然后針對(duì)機(jī)載和星載兩種情況下的幾何模型導(dǎo)出了聚束SAR合成孔徑長(zhǎng)度計(jì)算的新公式.在星載情況下,考慮了地速對(duì)孔徑設(shè)計(jì)的影響.最后通過數(shù)值模擬分析證實(shí)了采用新公式進(jìn)行計(jì)算合成孔徑長(zhǎng)度的必要性.該文為聚束SAR合成孔徑長(zhǎng)度提供了設(shè)計(jì)參考.Abstract: The traditional formula computing the synthetic aperture length of spotlight SAR and its localization are presented in this paper firstly. Then the new formula to com puting the synthetic aperture length of spotlight SAR is deducted on the basis of airborne and spaceborne geometry models. Especially in spaceborne model, the earth speed is considered. Finally, the data simulation results validate that it is necessary to use the newformula to compute the synthetic aperture length. This paper provides the reference for deagnmg synthetic aperture length of spotlight SAR.
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Carrara W G,Goodman R S,Majewski R M.Spotlight Synthetic Aperture Radar:Signal Processing Algorithms.Norwood,MA:Artech House,1995,Chap.1,2. ［2］袁孝康.星載合成孔徑雷達(dá)回波多普勒頻率的計(jì)算.上海航天,2001,18(3):1-4.[2]洪文,毛士藝.機(jī)載聚束式合成孔徑雷達(dá)成像技術(shù).北京:中國(guó)航空科技報(bào)告,1997. -
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