Key issues of InSAR system designment based on satellite formation

doi:10.11947/j.AGCS.2022.20220110

Abstract

Abstract: The space-based InSAR system can be used in all-weather, all-day, and with high degree of data processing automation, which can measure the global digital surface models and acquire radar orthophotos in a short time, making it a promising system with broad development prospects. This paper firstly introduced the InSAR measurement method and the error transformation model which may affect the product accuracy, and expounded the InSAR system based on satellite formation. Then, by considering the two aspects of obtaining interference data and ensuring accuracy, it is proposed that without considering SAR technology, the main key technologies of satellite formation InSAR system design include:system coherence, baseline selection, satellite formation configuration, cooperative mode of two satellites, product precision control, et al. On the basis of summarizing the key technologies of satellites, this paper analyzes the performance and core indicators involved in these key technologies, and proposes the elements to be concerned about in the design.

Key words: InSAR, satellite formation, coherence, time and space and phase synchronization, phase error control

CLC Number:

P236

LOU Liangsheng, MIAO Jian, CHEN Junli, LIU Zhiming, ZHANG Xiaowei, ZHANG Hao. Key issues of InSAR system designment based on satellite formation[J]. Acta Geodaetica et Cartographica Sinica, 2022, 51(7): 1372-1385.

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