| 聚束SAR扩展Chirp Scaling成像算法. |
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| 引用本文： | 孙进平,王俊,袁运能,毛士艺.聚束SAR扩展Chirp Scaling成像算法.[J].中国航空学报,2002,15(2):103-108. |
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| 作者姓名： | 孙进平 王俊 袁运能 毛士艺 |
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| 作者单位： | Department of EE，Beijing University of Aeronautics and Astronautics，Beijing 100083，China |
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| 基金项目： | National Natural Science F oundation of china(6893 10 40 ) |
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| 摘 要： | 在合成孔径雷达（SAR Synthetic Aperture Radar)的成像算法中，Chrip Scaling成像算法具有计算效率高的优点，因此得到了较为广泛的应用。详细研究了子孔径扩展Chirp Scaling算法在高分辩率聚束模式SAR中的应用，包括子孔径划分和方位向处理问题，针对A.Moreira等1996年所提算法在处理聚束SAR数据时所产生的问题，给出了经过改进的适合于大斜视角处理的整个计算过程的完整表达式。在给出点目标仿真的同时，利用E-SAR实际数据对述方法进行了验证，结果对具体的兼容条带和聚束两种工作模式的SAR处理机设计具有一定的参考价值。
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| 关 键 词： | 合成孔径雷达 聚束模式 成像算法 Chirp Scaling 方位向 SAR |
Extended Chirp Scaling Algorithm for Spotlight SAR |
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| SUN Jin ping,WANG Jun,YUAN Yun neng,MAO Shi yi.Extended Chirp Scaling Algorithm for Spotlight SAR[J].Chinese Journal of Aeronautics,2002,15(2):103-108. |
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| Authors: | SUN Jin ping WANG Jun YUAN Yun neng MAO Shi yi |
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| Abstract: | Among Synthetic Aperture Radar (SAR) image formation algorithms, the chirp scaling algorithm (CSA) is computationally highly efficient and has been practically used. In this paper, how to implement the subaperture extended CSA in a high resolution spotlight mode SAR is studied in detail. The procedures such as subaperture processing and azimuth processing are discussed. According to the problems presented when using the method (A. Moreira, et al ,1996) to process spotlight SAR data, full formula expressions suitable for high squinted angles is presented. While point target simulation is analyzed, the method is validated by E SAR raw data. The results can be directly implemented in the design of SAR processors. \{ |
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| Keywords: | synthetic aperture radar \} spotlight mode imaging algorithm |
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