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GEO-UAV空天双基SAR二维分辨能力分析

李谨成 郭德明

李谨成, 郭德明. GEO-UAV空天双基SAR二维分辨能力分析[J]. 北京航空航天大学学报, 2020, 46(12): 2374-2380. doi: 10.13700/j.bh.1001-5965.2019.0611
引用本文: 李谨成, 郭德明. GEO-UAV空天双基SAR二维分辨能力分析[J]. 北京航空航天大学学报, 2020, 46(12): 2374-2380. doi: 10.13700/j.bh.1001-5965.2019.0611
LI Jincheng, GUO Deming. Two-dimensional resolution ability of GEO-UAV bistatic SAR[J]. Journal of Beijing University of Aeronautics and Astronautics, 2020, 46(12): 2374-2380. doi: 10.13700/j.bh.1001-5965.2019.0611(in Chinese)
Citation: LI Jincheng, GUO Deming. Two-dimensional resolution ability of GEO-UAV bistatic SAR[J]. Journal of Beijing University of Aeronautics and Astronautics, 2020, 46(12): 2374-2380. doi: 10.13700/j.bh.1001-5965.2019.0611(in Chinese)

GEO-UAV空天双基SAR二维分辨能力分析

doi: 10.13700/j.bh.1001-5965.2019.0611
详细信息
    作者简介:

    李谨成  男, 博士, 工程师。主要研究方向:雷达系统设计与信号处理

    郭德明  男, 博士, 高级工程师。主要研究方向:雷达系统设计与信号处理

    通讯作者:

    李谨成, E-mail:jincheng.li@buaa.edu.cn

  • 中图分类号: TN958

Two-dimensional resolution ability of GEO-UAV bistatic SAR

More Information
  • 摘要:

    收发平台分置于地球同步轨道(GEO)和无人机(UAV)的GEO-UAV空天双基合成孔径雷达(SAR)系统能够实现对重点观测区域高精度、高时相的观测,二维分辨能力为其重要的系统指标。针对GEO-UAV空天双基SAR的二维分辨能力进行了分析:首先,基于梯度法给出了空天双基SAR矢量化的二维分辨率的计算方法;其次,基于GEO-UAV空天双基SAR的构型计算了其距离分辨率、方位分辨率以及二维分辨矢量夹角;最后,基于系统的二维分辨能力提出了GEO-UAV空天双基SAR的构型设计准则,通过点目标仿真对该准则的有效性进行了验证。所提设计准则能够为GEO-UAV空天双基SAR的系统设计提供有力支撑。

     

  • 图 1  GEO-UAV空天双基SAR的几何构型

    Figure 1.  Geometric configuration of GEO-UAV bistatic SAR

    图 2  空天双基SAR的二维分辨单元

    Figure 2.  Two-dimensional resolution cell of bistatic SAR

    图 3  不同接收机入射角下GEO-UAV空天双基SAR的距离向分辨率随观测角的变化(ΘT=45°)

    Figure 3.  Range resolution curves of GEO-UAV bistatic SAR changing with observation angle under different receiver incidence angles (ΘT=45°)

    图 4  低轨道倾角GEO SAR的卫星运动速度

    Figure 4.  Satellite velocity of low-inclination GEO SAR

    图 5  GEO-UAV空天双基SAR的方位向分辨率随观测角和速度夹角的变化

    Figure 5.  Azimuth resolution of GEO-UAV bistatic SAR at different observation angles and velocity angles

    图 6  GEO-UAV空天双基SAR的二维分辨矢量夹角随观测角和速度夹角的变化

    Figure 6.  Two-dimensional resolution vector angle of GEO-UAV bistatic SAR at different observation angles and velocity angles

    图 7  满足式(16)中构型设计准则的GEO-UAV空天双基SAR可行观测角

    Figure 7.  Feasible observation angle of GEO-UAV bistatic SAR under configuration criteria in Eq.(16)

    图 8  不同观测角下GEO-UAV空天双基SAR点目标成像结果(UAV SAR采用正侧视模式)

    Figure 8.  Point target contours of GEO-UAV bistatic SAR at different observation angles (UAV SAR in side-looking mode)

    表  1  GEO-UAV空天双基SAR参数

    Table  1.   Parameters of GEO-UAV bistatic SAR

    参数 发射机 接收机
    波长/m 0.24 0.24
    带宽/MHz 250 250
    接收天线长度/m 0.75 0.75
    平台高度/km 35786 500
    平台运动速度/(m·s-1) 30 65
    地面入射角/(°) 45 35
    下载: 导出CSV
  • [1] CUMMING I G, WONG F H.Digital processing of synthetic aperture radar data:Algorithms and implementation[M].Beijing:Publishing House of Electronics Industry, 2012(in Chinese).
    [2] 李春升, 王伟杰, 王鹏波, 等.星载SAR技术的现状与发展趋势[J].电子与信息学报, 2016, 38(1):229-240.

    LI C S, WANG W J, WANG P B, et al.Current situation and development trends of spaceborne SAR technology[J].Journal of Electronics and Information Technology, 2016, 38(1):229-240(in Chinese).
    [3] YAN X Y, CHEN J, LIYANGAGE B, et al.A light-weight SAR system for multi-rotor UAV platform using LFM quasi-CW waveform[C]//Geoscience and Remote Sensing Symposium.Piscataway: IEEE Press, 2016: 7346-7349.
    [4] 徐海胜, 宋红军, 邓云凯, 等.星/机双基SAR成像技术研究[J].电子与信息学报, 2011, 33(10):2438-2444.

    XU H S, SONG H J, DENG Y K, et al.A study of spaceborne/airborne hybrid bistatic SAR imaging[J].Journal of Electronics and Information Technology, 2011, 33(10):2438-2444(in Chinese).
    [5] KRIEGER G, MOREIRA A.Spaceborne bi- and multistatic SAR:Potential and challenges[J].IEEE Proceedings-Radar Sonar and Navigation, 2013, 153(3):184-198.
    [6] BEHNER F, REUTER S, NIES H, et al.High resolution bistatic experiments using TerraSAR-X staring spotlight mode and the very high resolution SAR mode of the Fraunhofer FHR PAMIR system[C]//Proceedings of the Eusar: European Conference on Synthetic Aperture Radar.Piscataway: IEEE Press, 2016: 741-744.
    [7] 李谨成.空天双/多基SAR成像与探测技术研究[D].北京: 北京航空航天大学, 2018: 18-45.

    LI J C.Bistatic and multistatic SAR imaging and exploration technology based on aero-space platforms[D].Beijing: Beihang University, 2018: 18-45(in Chinese).
    [8] SUN Z, WU J, YANG J, et al.Path planning for GEO-UAV bistatic SAR using constrained adaptive multiobjective differential evolution[J].IEEE Transactions on Geoscience and Remote Sensing, 2016, 54(11):6444-6457.
    [9] SUN Z, WU J, PEI J, et al.Inclined geosynchronous spaceborne-airborne bistatic SAR:Performance analysis and mission design[J].IEEE Transactions on Geoscience and Remote Sensing, 2016, 54(1):343-357.
    [10] CARDILLO G P.On the use of the gradient to determine bistatic SAR resolution[C]//Proceedings of the Antennas and Propagation Society International Symposium.Piscataway: IEEE Press, 1990: 1032-1035.
    [11] ANTONNIO M, ALFREDO R.Spatial resolution of bistatic synthetic aperture radar:Impact of acquisition geometry on imaging performance[J].IEEE Transactions on Geoscience and Remote Sensing, 2011, 49(10):3487-3503.
    [12] 郑经波.地球同步轨道合成孔径雷达系统分析及工作模式研究[D].北京: 中国科学院大学, 2011.

    ZHENG J B.System analysis and working mode GEO SAR[D].Beijing: University of Chinese Academy of Sciences, 2011(in Chinese).
    [13] YU Z.Concepts, properties, and imaging technologies for GEO SAR[J].Proceedings of SPIE-The International Society for Optical Engineering, 2009, 7494:749407.
    [14] ULANDER L M H, HELLSTEN H, STENSTROM G.Synthetic-aperture radar processing using fast factorized back-projection[J].IEEE Transactions on Aerospace and Electronic Systems, 2003, 39(3):760-776.
    [15] MARC R C, PAUL P, KRIEGER G, et al.Efficient time-domain image formation with precise topography accommodation for general bistatic SAR configurations[J].IEEE Transactions on Aerospace and Electronic Systems, 2011, 47(4):2949-2966.
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出版历程
  • 收稿日期:  2019-12-04
  • 录用日期:  2020-04-07
  • 网络出版日期:  2020-12-20

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