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地球同步轨道圆迹SAR研究 被引量:11

Study on Geosynchronous Circular SAR
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摘要 该文介绍了地球同步轨道圆迹合成孔径雷达(Geosynchronous Circular SAR,Geo-CSAR)的概念,通过设计同步轨道的轨道参数,可以形成近圆的卫星相对地球轨迹,使SAR载荷的凝视成像模式成为可能,实现对地的大面积定点连续观测以及真3维信息获取;研究分析了Geo-CSAR的成像能力,指出其在瞬时覆盖度、连续观测范围及3维精确定位方面,具有现有低轨星载SAR无法比拟的优势,是实现全球不间断覆盖的有效途径之一,在军事侦察、灾害监测方面具有重要的应用前景。 The concept of Geosynchronous Circular SAR (Geo-CSAR) is introduced in this paper. With the design of the geosynchronous orbit parameters, a near-circular satellite sub-track could be formed to enable the staring imaging mode, which supports the advanced applications for wide-field and 3-D information acquisition under long-term consistent observation. This paper also analyzes Geo-CSAR's imaging formation capabilities, and concludes its attractive advantages over low-earth orbit spaceborne SAR in terms of instantaneous coverage, consistent observing area, 3-D positioning accuracy and etc.. Encouraging expectations for Geo-CSAR thus could be positively predicted in military investigation and disaster monitoring management aoolications.
出处 《雷达学报(中英文)》 CSCD 2015年第3期241-253,共13页 Journal of Radars
基金 探索研究项目 国家自然科学基金(61431018 61201404)资助课题
关键词 对地观测 地球同步轨道 合成孔径雷达 圆迹SAR 大面积定点连续观测 3维成像 Earth observation Geosynchronous orbit Synthetic Aperture Radar (SAR) Circular SAR (CSAR) Wide-field consistent observation 3-D imaging
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