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Infrared and Laser Engineering, Volume. 52, Issue 2, 20220406(2023)

Spaceborne inverse synthetic aperture lidar imaging of nonuniformly rotating orbit object

Hang Ruan1, Qiang Zhang1, Yu′ang Yang1, and Can Xu2
Author Affiliations
  • 1Beijing Institute of Tracking and Telecommunications Technology, Beijing 100094, China
  • 2School of Space Command, Space Engineering University, Beijing 101416, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (10)
    Equations (23)
    References (15)
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    Figures & Tables(10)
    Rotating model of ISAL imaging

    Fig. 1. Rotating model of ISAL imaging

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    Imaging geometry

    Fig. 2. Imaging geometry

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    Curves of relative rotation angle

    Fig. 3. Curves of relative rotation angle

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    Target model of scattering point

    Fig. 4. Target model of scattering point

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    The time-frequency distribution of the 30th range cell （SPWVD）

    Fig. 5. The time-frequency distribution of the 30th range cell （SPWVD）

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    ISAL 2D imaging results (SNR=5 dB) (a) RD algorithm; (b) RID algorithm; (c) The proposed RWT algorithm

    Fig. 6. ISAL 2D imaging results (SNR=5 dB) (a) RD algorithm; (b) RID algorithm; (c) The proposed RWT algorithm

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    2D ISAL imaging results in different SNR

    Fig. 7. 2D ISAL imaging results in different SNR

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    2D ISAL imaging results in different SNR （uniformly rotating）

    Fig. 8. 2D ISAL imaging results in different SNR （uniformly rotating）

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    • Table 1. Contrasts of ISAL images in different SNR

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      Table 1. Contrasts of ISAL images in different SNR

      Imaging algorithm Contrasts
      SNR=−10 dBSNR=−5 dBSNR=0 dBSNR=5 dBSNR=10 dBSNR=15 dB
      RD0.546 40.631 50.8591.253 11.744 82.266 8
      RID2.6524.117 14.882 45.198 15.498 75.528 1
      The proposed RWT4.136 64.299 54.729 85.247 75.674 75.958

    • Table 2. Contrasts of ISAL images in different SNR （uniformly rotating）

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      Table 2. Contrasts of ISAL images in different SNR （uniformly rotating）

      Imaging algorithm Contrasts
      SNR=−10 dBSNR=−5 dBSNR=0 dBSNR=5 dBSNR=10 dBSNR=15 dB
      RD0.564 90.683 90.975 31.457 32.122 42.837 7
      RID2.6023.760 45.298 95.457 95.781 65.769 8
      The proposed RWT4.127 94.360 74.929 85.477 96.021 86.294
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    Hang Ruan, Qiang Zhang, Yu′ang Yang, Can Xu. Spaceborne inverse synthetic aperture lidar imaging of nonuniformly rotating orbit object[J]. Infrared and Laser Engineering, 2023, 52(2): 20220406

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    Paper Information

    Category: Lasers & Laser optics

    Received: Jun. 15, 2022

    Accepted: --

    Published Online: Mar. 13, 2023

    The Author Email:

    DOI:10.3788/IRLA20220406

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology