Application of MA-ATI SAR for Estimating the Direction of Moving Water Surface Currents in Pi-SAR2 Images
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Title
- Application of MA-ATI SAR for Estimating the Direction of Moving Water Surface Currents in Pi-SAR2 Images
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Author(s)
- Yoshida Takero; Ouchi Kazuo; Yang, Chan Su
- KIOST Author(s)
- Yang, Chan Su(양찬수)
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Alternative Author(s)
- 양찬수
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Publication Year
- 2021-02
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Abstract
- A multiaperture along-track interferometric synthetic aperture radar (MA-ATI SAR) theory was proposed to obtain velocity vectors of moving objects. This theory utilizes two antennas to estimate two velocity components (aft- and fore-looking directions) by multi/sublook processing. The moving direction can then be calculated by the two velocity components. Combining it with the conventional range velocity estimation, the velocity vector can be estimated. In order to validate its methodology, the present study applies MA-ATI SAR to airborne polarimetric interfereometric SAR-2 (Pi-SAR2) for estimating the directions of moving water surface currents of rivers. The results were in good agreement with the true moving directions. The estimated accuracy showed the direction error of approximately 20 degrees for the three cases out of four. One case showed the higher error, since there may be complicated flow patterns. The findings of this study have implications for the applicability of the MA-ATI method to an airborne SAR system.
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ISSN
- 1939-1404
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URI
- https://sciwatch.kiost.ac.kr/handle/2020.kiost/40171
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DOI
- 10.1109/JSTARS.2021.3060008
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Bibliographic Citation
- IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING, v.14, pp.2724 - 2730, 2021
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Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
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Keywords
- Synthetic aperture radar; Estimation; Azimuth; Sea surface; Rivers; Antennas; Surface treatment; Multiaperture along-track interferometric synthetic aperture radar (MA-ATI SAR); multi; sublook processing; velocity vector; water surface current
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Type
- Article
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Language
- English
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Document Type
- Article
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