SAR有源编码辐射定标技术研究  

Study on Active Coded Radiometric Calibration Technique of SAR

作　　者：纪慧波[1] 王一丁[1] 洪峻[1] 吴一戎[1] 

机构地区：[1]中国科学院电子学研究所,北京100080

出　　处：《遥感技术与应用》2003年第3期164-168,共5页Remote Sensing Technology and Application

摘　　要：在对SAR有源编码辐射定标技术的研究中,首先开展了地物杂波信号对SAR辐射定标精度影响的研究,推出了受地物杂波信号影响的系统总体传递函数的误差公式,其次分析了有源编码辐射定标技术抑制地物杂波的机理和信号处理流程。在不同地物杂波分布情况下,完成了SAR有源编码辐射定标技术的仿真实验。实验结果证明SAR有源编码定标技术能够有效地抑制地物杂波信号的影响,改善SAR辐射定标的精度,特别是提高了定标场地选择的灵活性。This paper studies Active Coded Radiometric Calibration Technique (ACRCT) of SAR. ACRCT has been widely studied as SAR calibration technique. In some calibration sites, background is complicated, which will affect the radiometric calibration precision. The influence of background clutter signal to the precision of radiometric calibration is analyzed, and an equation to calculate system transfer function error is proposed. With this equation, some simulation experiments are carried out. The principle and signal processing flowchart of ACRCT are studied in detail. Two clutter models are built and based on them, ACRCT simulation experiments are carried out. Experiment results testify that ACRCT can effectively restrain the influence of background clutter signal and improve the precision of radiometric calibration of SAR, especially enhance flexibility of choosing calibration field.

关 键 词：离码 地物杂波 SAR 辐射定标 

分 类 号：TP75[自动化与计算机技术—检测技术与自动化装置]