Identify Islands by Complex SAR Image

Abstract

The performance of interferometric synthetic aperture radar (INSAR)-based objects identifing in sea environment with clutter background is researched by many literatures, but most of them are mainly about detecting dynamic objects, such as ship targets. A new method is presented in this paper, which utilizes SAR image and point target analysis method to identify islands on sea surface in near and far range from mainland, especially for islets which can be confused with big ship or other objects such as floating, oil platform and so on. In the sea, either islands or islets is static objects, and other thing is dynamic characteristics, according to this characteristics, islands can be distinguished by spaceborne synthetic aperture radar (SAR) images joint point target analysis (PTA) method. The processing procedure includes three main phases: interferometric phase fringe, coherence evaluation, and sublook analysis. This method is applied with TerraSAR-X SSC image in HONHKONG area.