Cross Range Resolution of ISAR Images in Monitoring Ships

Abstract

In this paper, the resolution of the ISAR 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 one vessel was possible using the ISAR image. 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 acquired the rotational motion data by pitching and rolling movements. Analyzing the change of pitch angle occurred each minute, it was possible shown that the change of pitch angle is 0.5 degrees and the resolution of an ISAR image was set to 1.8m.