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WANG Youjun, DONG Zhen, WANG Xiantao, et al. Three-dimensional tomographic imaging of urban buildings and structures using chinese commercial SAR satellite data[J]. Journal of Radars, in press. doi: 10.12000/JR25098
Citation: WANG Youjun, DONG Zhen, WANG Xiantao, et al. Three-dimensional tomographic imaging of urban buildings and structures using chinese commercial SAR satellite data[J]. Journal of Radars, in press. doi: 10.12000/JR25098
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Three-dimensional Tomographic Imaging of Urban Buildings and Structures Using Chinese Commercial SAR Satellite Data

DOI: 10.12000/JR25098 CSTR: 32380.14.JR25098
  • 1.

    College of Electronic Science and Technology, National University of Defense Technology, Changsha 410073, China

  • 2.

    Spacety Co., Ltd. (Changsha), Changsha 410006, China

  • 3.

    Piesat Information Technology Co., Ltd., Beijing 100195, China

  • 4.

    Beijing Normal University, Beijing 100875, China

Funds:  The National Natural Science Foundation of China (62101568, 62371460, 62471474), National Postdoctoral Program of Innovative Talents (BX20230473), Excellent Youth Program of Hunan Provincial Natural Science Foundation (2024JJ4046), Science and Technology Innovation Program of Hunan Province (2024RC3122)
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  • Corresponding author: DONG Zhen, dongzhen@nudt.edu.cn
  • Received Date: 2025-05-23
  • Rev Recd Date: 2025-08-03
    • Available Online: 2025-08-11
    Abstract
  • A single Synthetic Aperture Radar (SAR) image can capture only two-dimensional information, and traditional multitemporal Interferometric SAR (InSAR) techniques struggle with the layover problem, particularly in urban areas. SAR Tomography (TomoSAR) provides the advantage of obtaining three-dimensional (3-D) information while offering a feasible solution to the layover problem. This technique relies on repeated observations of the target scene to achieve 3-D resolution by synthesizing the aperture in the elevation direction. In China, early data sources for spaceborne TomoSAR primarily came from foreign satellites such as TerraSAR-X and COSMO-SkyMed, which constrained the development of the country’s TomoSAR technology. In recent years, the launch of Chinese commercial SAR satellites (e.g., Fucheng-1 and Hongtu-1) has expanded the range of data acquisition sources. However, studies on the tomographic 3-D inversion of urban buildings and structures using data from Chinese commercial SAR satellites remain limited. To validate the usability of Chinese commercial SAR satellite data in urban tomography 3-D parameter inversion and the effectiveness of applying these data to existing tomography imaging methods, this paper develops a 3-D inversion framework for urban TomoSAR and conducts a 3-D inversion study of urban buildings and structures using data from the Fucheng-1 satellite of Spacety Co., Ltd. (Changsha) and the Hongtu-1 SAR satellite of Piesat Information Technology Co., Ltd. The experimental results validate the potential of these two satellite systems for tomographic applications, providing pioneering technical support for future in-depth research and applications.

     

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