2005 Fiscal Year Final Research Report Summary
Research of the navigation support system with AIS and Doppler radars
| Project/Area Number |
15560690
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Naval and maritime engineering
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| Research Institution | Tokyo University of Marine Science and Technology |
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Principal Investigator |
FUJISAKA Takahiko Tokyo University of Marine Science and Technology, Faculty of Marine Technology, Associate Professor, 海洋工学部, 助教授 (00345399)
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| Co-Investigator(Kenkyū-buntansha) |
IMAZU Hayama Tokyo University of Marine Science and Technology, Faculty of Marine Technology, Professor, 海洋工学部, 教授 (00016958)
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| Project Period (FY) |
2003 – 2005
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| Keywords | AIS / Marine Radar / Coherent Radar / Remote Information Sensing / Pulse Doppler Radar |
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| Research Abstract |
The following results were obtained in this research.
(1)The resolution of the ISAR (Inverse Synthetic Aperture Radar) images was estimated through the rotational and translational motion data collected in the Tokyo Bay, on board the training ship Shioji Maru during July, 2004. As result, it was shown that the identification of a ship was possible using the ISAR images. First, was clarified the relationship between the cross-range resolution of the ISAR image and the change of the pitch angle of the vessel. Then, was show that the resolution of ISAR images was 0.5mk〜2.0m.
(2)The image of a ship obtained by the marine radar is not necessarily corresponding to its true shape because of multiple reflections and scintillation. Therefore, the estimation of the ship's shape and its aspect from the radar image are difficult at present. In this paper, a method to estimate the ship's shape by means of the integration of the radar images is proposed. According to the proposed method, the aspect angle of the ship can be estimated with 5 degrees error and the length of the ship can be estimated with 40m error.
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