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Shallow Sea Underwater Topography Detection Based on SAR Subaperture Image
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Feicheng RONG1, 2, Junmin MENG1, Yonggang JI2
Journal of Telemetry, Tracking and Command | 2024, 45(1) : 106 - 115
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Journal of Telemetry, Tracking and Command | 2024, 45(1): 106-115
• Radar and Countermeasures •
Shallow Sea Underwater Topography Detection Based on SAR Subaperture Image
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Feicheng RONG1, 2, Junmin MENG1, Yonggang JI2
Affiliations
  • 1.First Institute of Oceanography, Ministry of Natural Resources, Qingdao, 266061, China
  • 2.College of Oceanography and Space Informatics, China University of Petroleum, Qingdao 266580, China
Published: 2024-01-15 doi: 10.12347/j.ycyk.20231115002
Outline
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Accurate measurement of underwater terrain in coastal areas is the key to human activities in the ocean. Synthetic aperture radar (SAR) provides a new means for the detection of shallow sea terrain. TerraSAR-X bunching mode can obtain highresolution SAR data with a long integration time, so that the seabed terrain of shallow sea can be inverted more accurately. Traditional SAR image underwater terrain detection is based on the assumption of constant wave period, which not only needs to know the initial water depth to solve the wave period, but also brings some errors to the detection results. In this paper, an underwater terrain detection method based on subaperture images is proposed. A SAR image is decomposed into subaperture images with fixed multiscene time intervals, and the time interval between subaperture images is used to solve the changing wave period, so as to obtain more accurate underwater terrain. The TerraSAR-X data of Wuzhizhou Island in Hainan Province was used to verify the feasibility of this method. The results obtained by inversion of this method were compared with the GEBCO data, and it was found that the two were in good agreement（the MAE was 2.8m and the MRE was 23.91%）. It is proved that this method has great potential for retrieving water depth in shallow sea.

Underwater topography detection  /  Subaperture decomposition  /  Linear dispersion relation
Feicheng RONG, Junmin MENG, Yonggang JI. Shallow Sea Underwater Topography Detection Based on SAR Subaperture Image[J]. Journal of Telemetry, Tracking and Command, 2024 , 45 (1) : 106 -115 . DOI: 10.12347/j.ycyk.20231115002
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Year 2024 volume 45 Issue 1
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Article Info
doi: 10.12347/j.ycyk.20231115002
  • Receive Date：2023-11-15
  • Online Date：2026-03-19
  • Published：2024-01-15
Article Data
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History
  • Received：2023-11-15
  • Revised：2023-12-04
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Affiliations
    1.First Institute of Oceanography, Ministry of Natural Resources, Qingdao, 266061, China
    2.College of Oceanography and Space Informatics, China University of Petroleum, Qingdao 266580, China
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