合成孔径雷达聚束模式合成孔径长度研究
Study on the Synthetic Aperture Length of SAR Working on Spotlight Mode
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摘要: 该文首先给出了传统聚束SAR合成孔径长度计算公式并指出了其局限性,然后针对机载和星载两种情况下的几何模型导出了聚束SAR合成孔径长度计算的新公式.在星载情况下,考虑了地速对孔径设计的影响.最后通过数值模拟分析证实了采用新公式进行计算合成孔径长度的必要性.该文为聚束SAR合成孔径长度提供了设计参考.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.星载合成孔径雷达回波多普勒频率的计算.上海航天,2001,18(3):1-4.[2]洪文,毛士艺.机载聚束式合成孔径雷达成像技术.北京:中国航空科技报告,1997. -
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