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