| 时间同步误差对星载寄生式InSAR系统干涉相位的影响分析 |
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| 引用本文： | 张永胜,梁甸农,孙造宇,董臻.时间同步误差对星载寄生式InSAR系统干涉相位的影响分析[J].宇航学报,2007,28(2):370-374. |
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| 作者姓名： | 张永胜 梁甸农 孙造宇 董臻 |
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| 作者单位： | 国防科技大学,电子科学与工程学院,长沙,410073 |
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| 摘 要： | 时间同步是星载寄生式InSAR系统的关键问题之一。提出了一种新的时间同步误差模型，并在该模型的基础上详细分析了不同形式的时间同步误差对双站SAR成像及InSAR干涉相位的影响。建立了时间同步误差到干涉相位误差的传递模型，指出了星载寄生式InSAR系统对频率源准确度和稳定度的指标要求，仿真验证了理论分析的正确性，分析结果对星载分布式InSAR系统的设计具有重要意义。
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| 关 键 词： | 星载寄生式InSAR 双站SAR 时间同步 干涉相位误差 |
| 文章编号： | 1000-1328（2007）02-0370-05 |
| 修稿时间： | 2006-06-022006-09-30 |
Effect of Time Synchronization Error on Interferometric Phase of Spaceborne Parasitic InSAR System |
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| ZHANG Yong-sheng,LIANG Dian-nong,SUN Zao-yu,DONG Zhen.Effect of Time Synchronization Error on Interferometric Phase of Spaceborne Parasitic InSAR System[J].Journal of Astronautics,2007,28(2):370-374. |
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| Authors: | ZHANG Yong-sheng LIANG Dian-nong SUN Zao-yu DONG Zhen |
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| Institution: | School of Electronic Science and Technology, National University of Defense Technology, Changsha 410073, China |
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| Abstract: | Time synchronization is a key problem of spaceborne parasitic Interferometric SAR(InSAR) system because the transmitters and receivers are mounted on separated platforms.A novel time synchronization error model was presented.The influence of different kinds of time synchronization errors on SAR image and Interferometric phase were analyzed in detail.The error transfer model from the time synchronization error to the Interferometric phase error was established.The accuracy and stability requirement of the USO in parasitic InSAR application was pointed out.The analysis,which is proved by simulations,offers the principle basis of correct time synchronization requirements for parasitic InSAR system design. |
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| Keywords: | Spaceborne parasitic InSAR Bistatic SAR Time synchronization Interferometric phase error |
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