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In Japan, there are a lot of bridges connecting islands. Particularly in the Seto Inland Sea, several bridges are constructed near the narrow channels. When we pursue the safe operation of the vessels, we consider it important to analyze the masking features of the radar images of such bridges and the reflection intensity. In this study, we analyzed the features by the difference in the structure and the masking features along the direction of the width of the bridge and the reflection intensity about two bridges, in order to improve the safety of ships traffic. Conventionally, the radar reflection intensity of a small object such as a small ship has been evaluated by the maximum signal intensity in the image. In this study, we tried a new evaluation method for the radar reflection intensity of the connecting bridges those are huge and strong reflection structures, and we report the result.

Masking Features of the Radar Images of Bridges and Radar Reflection Intensity