合成孔径雷达相干目标的分辨力评定
THE ASSESSMENT OF SAR RESOLUTION OF COHERENT TARGETS
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摘要: 通常对合成孔径雷达图象分辨力的评定是以雷达系统参数来考虑的。实际上由于合成孔径雷达本身成象的特点,其图象分辨力也是同目标特性密切相关的。本文通过数学分析,将相干目标的分布模型与图象的可分辨条件结合在一起,提出了与目标特性相关的雷达图象分辨力评定标准可分辨概率,并针对不确定目标的特性提出了平均可分辨概率的概念。针对所提出的分辨力评定标准,本文给出了计算示例,从计算结果中可以看出,目标特性对于雷达图象的分辨力有很大的影响,在设计或者评定雷达图象分辨力时应当考虑到目标特性的影响。
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关键词:
- 合成孔径雷达; 分辨力评定; 相干目标
Abstract: A method is presented to assess the Synthitic Aperture Radar (SAR) resolution of coherent targets. The SAR resolution is usually considered to be a parameter of SAR system and determined by SAR itself. However, the SAR resolution is also relative to the properties of radar targets. in this paper, the relationship between SAR resolution and coherency of radar targets is analysed in details, and the separable probability is presented as a parameter to assess the SAR resolution. Numerical results are given to illuminate the assessment. -
Ulaby F T, Moore R K, Fang A K. Microwave Remote Sensing Active and Passive, Vo1.2, MA: Addison-Wesley, 1982，Chap. 7.[2]Goodman N R. Ann[J].Math. Statist.1963, 34(1):152-177[3]Papoulis A. Probability, Random Variables, and Stochastic Processes, New York: McGraw-Hill, 1965, Chap. 7. -
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