卫星编队InSAR系统设计系列关键技术

doi:10.11947/j.AGCS.2022.20220110

摘要/Abstract

摘要： 天基InSAR系统具有全天候、全天时、数据处理自动化程度高等优点,可以快速获取数字表面模型和雷达正射影像,发展前景广阔。本文首先介绍了InSAR测量及影响产品精度误差传递模型,阐述了基于卫星编队InSAR系统;然后,从系统获取干涉数据和确保产品精度两方面出发,提出在不考虑SAR技术的情况下,卫星编队InSAR系统设计主要关键技术有:系统相干性、基线选择、卫星编队设计、双星协同工作、产品精度控制等;最后,在归纳总结天绘二号关键技术攻关的基础上,对这些关键技术所涉及的性能及核心指标进行了分析,提出了设计所关注的要素。

关键词: 干涉合成孔径雷达, 卫星编队, 相干性, 时间、空间、相位三同步, 相位误差控制

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

中图分类号:

P236

楼良盛, 缪剑, 陈筠力, 刘志铭, 张笑微, 张昊. 卫星编队InSAR系统设计系列关键技术[J]. 测绘学报, 2022, 51(7): 1372-1385.

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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