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| Analysis of Spaceborne Dual-antenna InSAR System Characteristic Under Flexible Baseline Oscillation |
| Wang Xiao-guang①② Wang Zhi-qiang① Yang Xin① Liu Wei① |
| ①(Academy of Optic-Electronics, Chinese Academy of Sciences, Beijing 100094, China) ②(Graduate School, Chinese Academy of Sciences, Beijing 100049, China) |
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Abstract The main performance of spaceborne dual-antenna InSAR system in case of flexible baseline oscillation is investigated. Based on the mast motion model, a reduced raw echo signal of the slave antenna is derived under a limited condition. Then, the antenna beam misalignment is analysed and an alignment scheme is proposed. Finally, the oscillation effect on the SAR image resolution and the interferogram coherence is expounded for both the slow and high frequency. In the example of typical system, theoretical analysis and numerical simulation conducted show the result is consistent, which could provide an reference for the system design and application.
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Received: 27 August 2010
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Corresponding Authors:
Wang Xiao-guang
E-mail: sy0515140@163.com
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2011, Vol. 33 
