Journal of Infrared and Millimeter Waves, Volume. 40, Issue 4, 496(2021)

Attitude direction estimation of space target parabolic antenna loads using sequential terahertz ISAR images

Ye ZHANG, Xiao YANG, Xin-Rui JIANG, Qi YANG, Bin DENG*, and Hong-Qiang WANG
Author Affiliations
  • College of Electronic Science and Technology, National University of Defense Technology, Changsha 410073, China
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    Figures & Tables(16)
    Space target observation geometry of space-based terahertz radar.
    Geometry model of a paraboloid.
    RCS of the parabolic antenna model at 0.22 THz.
    ISAR images of the parabolic antenna model(a) φ=25°, VV polarization; (b) φ=60°, VV polarization; (c) φ=60°, VH polarization
    Flowchart of the attitude direction estimation process
    Equivalent observation scene of ISAR imaging
    ISAR imaging results of the parabolic antenna model(a) Ku-band radar,(b) terahertz radar
    Simplified three-dimensional satellite model
    Radar tracking LOS angle trajectory
    Sequential terahertz ISAR imaging results
    Solar panel component detection results (marked with blue solid lines)
    Parabolic antenna component detection results (marked with blue solid lines)
    Absolute error of estimated ellipse parameters in each ISAR image
    Absolute error of attitude direction parameters
    • Table 1. Main Parameters of the ISAR System

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      Table 1. Main Parameters of the ISAR System

      Radar typeKu-band radarterahertz radar
      Center frequency of signal16.7 GHz220 GHz
      Bandwidth2 GHz10 GHz
      Range resolution7.5 cm1.5 cm
    • Table 2. Estimation Results of Parabolic Antenna Parameters

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      Table 2. Estimation Results of Parabolic Antenna Parameters

      Parameter typeTrue valueEstimated valueAbsolute error
      Center coordinates(-1 m,-0.1 m,0.2 m)(-0.996 5 m,-0.103 1 m,0.187 3 m)(0.003 5 m,0.003 1 m,0.012 7 m)
      Length of radius0.25 m0.246 5 m0.003 5 m
      Attitude direction(50°,220°)(50.913 5°,221.172 6°)(0.913 5°,1.172 6°)
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    Ye ZHANG, Xiao YANG, Xin-Rui JIANG, Qi YANG, Bin DENG, Hong-Qiang WANG. Attitude direction estimation of space target parabolic antenna loads using sequential terahertz ISAR images[J]. Journal of Infrared and Millimeter Waves, 2021, 40(4): 496

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    Paper Information

    Category: Research Articles

    Received: Oct. 21, 2020

    Accepted: --

    Published Online: Sep. 9, 2021

    The Author Email: Bin DENG (dengbin_nudt@163.com)

    DOI:10.11972/j.issn.1001-9014.2021.04.009

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