Science Service System

Summary of Proposal MTH0201

TitleDetection of the targets on the ocean with Terra SAR data
Investigator He, Yijun - Institute of Oceanology, Chinese Academy of Sciences, Lab of Ocean circulation and wave studies
Team Members
Dr. Lehner, Susanne - German Aerospace Center, MF-GW
Ms Li, Haiyan - Institute of Oceanology, Chinese Academy of Sciences, Lab of Ocean circulation and wave studies
SummaryCompetition for dwindling fishery resources, increased emphasis on protection of aquatic mammals, and a desire to improve safety of life and property under dangerous environmental conditions have all lead to an increased need for adequate management and enforcement of fisheries, especially in coast waters. Ship detection with remote sensing is important part of ocean study and has wide utilization in the civil and the military. Radiometric information provided by traditional single-channel SAR is not generally sufficient in ship detections in that it could not fully characterize the scattering mechanisms of targets. More information is embedded in multi-band, multi-polarization, multi-look and multi-mode, which has greater utilization in ocean. The study intends to provide the key methods to get the location, speed, heading, by dual-polarimetion and high resolution single-channel SAR data. Algorithm development can be separated into three specific areas, namely sub-aperture technique, ship detection and velocity estimation. Sub-aperture technique provides the way to get the same results as that of interferometry data with single channel data at the cost of resolution. Detection involves the segregation of all vessel pixels in a SAR image from the background sea clutter and land regions. Velocity estimation includes the direction and the amplitude. The proposal provides two new method to detect ships with dual and sub-aperture data, respectively. It estimates the velocity of a ship that means getting the velocity against the moving background. Delineation the coastline with high resolution SAR data will improve the accuracy of detecting the coastline. In order to complete these work we need the high-resolution dual polarimetric data and high-resolution single-polarimetric raw data. We anticipate that the accuracy of detection and velocity estimation can reach 75% with spotlight mode dual-polarimetric and singl polarimetric TerraSAR-X data, when wind velocity is lower than 7m/s.

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DLR 2004-2016