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陈国强, 郭华东, 梁达, 丁翼星, 吕明阳, 刘广. 月基SAR对地观测时空特性研究[J]. 深空探测学报(中英文), 2022, 9(3): 261-268. DOI: 10.15982/j.issn.2096-9287.2022.20210076
引用本文: 陈国强, 郭华东, 梁达, 丁翼星, 吕明阳, 刘广. 月基SAR对地观测时空特性研究[J]. 深空探测学报(中英文), 2022, 9(3): 261-268. DOI: 10.15982/j.issn.2096-9287.2022.20210076
CHEN Guoqiang, GUO Huadong, LIANG Da, DING Yixing, LV Mingyang, LIU Guang. Research on Spatio-Temporal Characteristics of Moon-Based SAR Earth Observation[J]. Journal of Deep Space Exploration, 2022, 9(3): 261-268. DOI: 10.15982/j.issn.2096-9287.2022.20210076
Citation: CHEN Guoqiang, GUO Huadong, LIANG Da, DING Yixing, LV Mingyang, LIU Guang. Research on Spatio-Temporal Characteristics of Moon-Based SAR Earth Observation[J]. Journal of Deep Space Exploration, 2022, 9(3): 261-268. DOI: 10.15982/j.issn.2096-9287.2022.20210076

月基SAR对地观测时空特性研究

Research on Spatio-Temporal Characteristics of Moon-Based SAR Earth Observation

  • 摘要: 月基雷达能对地表目标进行长时间大尺度范围的观测。根据美国喷气推进实验室(Jet Propulsion Laboratory,JPL)星历数据,分析了月基合成孔径雷达微波(Synthetic Aperture Radar ,SAR)平台在不同场景时对地球在时间上和空间上观测性能的差异,结合实际地月相对运动的空间关系完成了月基SAR回波的仿真。结果表明:通过月基SAR平台,可以找到位于地表的零多普勒面交线,并以此为基础实现较长时间、较大地面范围的周期性观测,用SAR回波仿真验证了其可行性。通过研究月基SAR的观测,可以为后续研究诸如地表潮汐运动、极区海冰回弹提供基础。

     

    Abstract: With the rapid development of lunar exploration, the concept of moon-based observation of earth has received more and more attention. The synthetic aperture radar (SAR) deployed on the moon for earth observation can obtain continuous observations of large areas on earth surface, and realize a single wide-area observation mode which makes up for the deficiency of space-borne SAR. Based on the JPL ephemeris data, in this paper the observation difference of moon-based SAR in different scenarios such as time domain and space domain was analyzed, and the simulation of SAR echo was completed using the actual earth-moon spatial relationship. The results show that the moon-based SAR can always find the intersection line of zero Doppler plane on earth surface, and long-term, large-scale periodic observations can be achieved. The SAR echo simulation verifies its feasibility. The study of moon-based SAR observations can provide a basis for follow-up studies such as surface tidal movement and polar sea ice rebound.

     

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