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Feasibility study of inclined geosynchronous SAR focusing using Beidou IGSO signals

基于北斗IGSO信号的倾斜地球同步轨道合成孔径雷达成像可行性研究

创新点

地球同步轨道合成孔径雷达(GEO SAR)的超长积累时间保证了其具有较高分辨率。但相反地, 多种非理想因素, 如弯曲轨道误差、大气传播效应和轨道摄动等, 也会不断积累, 导致成像质量下降, 甚至失效。本文给出了GEO SAR成像的验证实验。实验采用天地双基地SAR(SS-BISAR)配置。其中, 北斗IGSO卫星作为机会发射源;接收机由一个直达波天线和回波接收天线组成。实验分别对转发器和自然场景进行了成像处理, 结果良好, 验证了GEO SAR在几百到几千秒的积累时间下成像的可行性。

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Correspondence to Weiming Tian.

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Dong, X., Hu, C., Tian, W. et al. Feasibility study of inclined geosynchronous SAR focusing using Beidou IGSO signals. Sci. China Inf. Sci. 59, 129302 (2016). https://doi.org/10.1007/s11432-016-5524-x

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关键词

  • 地球同步轨道合成孔径雷达
  • 成像
  • 北斗导航卫星
  • 天地双基地SAR
  • 长积累时间