| 高分辨率SAR参考点目标频带调制效应的校正方法 |
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| 引用本文： | 林新越,洪峻,明峰.高分辨率SAR参考点目标频带调制效应的校正方法[J].国外电子测量技术,2010,29(4):32-36. |
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| 作者姓名： | 林新越 洪峻 明峰 |
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| 作者单位： | 1. 中国科学院空间信息处理与应用系统技术重点实验室,北京,100190;中国科学院电子学研究所,北京,100190;中国科学院研究生院,北京,100039
2. 中国科学院空间信息处理与应用系统技术重点实验室,北京,100190;中国科学院电子学研究所,北京,100190 |
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| 摘 要： | 各种类型的角反射器是SAR辐射定标常用参考目标,其辐射特性在高分辨率应用时将不再保持恒定。本文分析了高分辨率SAR系统中宽频带对常用参考目标RCS的调制效应及其对辐射定标中能量提取的影响,在此基础上提出了针对这类参考目标的辐射特性校正方法,补偿了调制效应。通过仿真量化了调制效应对能量提取算法的影响,并利用校正算法对地基SAR实验数据处理,验证了该方法的有效性。
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| 关 键 词： | 高分辨率SAR 辐射定标 雷达截面积 能量提取算法 |
A calibration method for frequency modulation of reference targets in high-resolution SAR systems |
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| Lin Xinyue,Hong Jun,Ming Feng.A calibration method for frequency modulation of reference targets in high-resolution SAR systems[J].Foreign Electronic Measurement Technology,2010,29(4):32-36. |
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| Authors: | Lin Xinyue Hong Jun Ming Feng |
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| Affiliation: | Lin Xinyue Hong Jun Ming Feng (1.Key Laboratory of Spatial Information Processing and Application System Technology,Chinese Academy of Sciences,Beijing 100190;2.Institute of Electronics,Chinese Academy of Sciences,Beijing 100190; 3.Graduate University of Chinese Academy of Sciences,Beijing 100039) |
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| Abstract: | All kinds of reflectors are widely used in SAR radiometric calibration.These references targets characters become non-const when applying in wideband high-resolution SAR system applications.In this paper how frequency modulation of reference targets affects the radiometric calibration procedure is analyzed.Further more a method to correct the inconsistency caused by the effect is introduced so that traditional calibration algorithm can be easily applied without big changes.Simulation is carried on to give quantitative results by the frequency modulation.A test-bed SAR experiment is carried on and related data is processed with calibration algorithms to validate the method. |
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| Keywords: | high-resolution SAR radiometric calibration RCS energy extraction |
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