Refocusing and Clustering Techniques for Ship Signature Enhancement in RADARSAT-2 Imagery – Findings based on Gibraltar scenes acquired with different resolution, polarization and incidence angles

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Authors
  1. Dragošević, M.
Corporate Authors
Defence Research and Development Canada, Ottawa Research Centre, Ottawa ON (CAN);MDA Systems Ltd., Ottawa ON (CAN)
Abstract
This report describes the work done under the contract W7714-091140/001/SV, R&D Support for SAR-Based Geospatial Intelligence and Terrain Analysis, Tasks 31 and 33. The focus of this report is on ship signatures and related artifacts in Synthetic Aperture Radar (SAR) Single Look Complex (SLC) imagery collected with different resolution, polarization and imaging geometry. Several techniques are proposed for refocusing blurred signatures, which likely originate from ships, but are shaped by various effects such as motion (of the ship and water), double bounce, sensitivity to polarization and SAR system characteristics (as dictated by the pulse Band Width (BW), Pulse Repetition Frequency (PRF), imaging geometry, Signal-to-Noise Ratio (SNR), beam pattern and other radiometric issues). The new contributions are: 1. Further data adaptive techniques that complement the previously developed ones; 2. Customized refocusing techniques, driven by system parameters, designed to discover range and azimuth ambiguities as a source of bright smears or blotches on the ocean surface. The proposed techniques are evaluated for potential implementation in Image Analyst Professional (IA Pro). They would be used to incrementally improve the information content available to the Image Analyst.

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Keywords
RASARSAT-2;Automatic Identification System (AIS);ship detection;ships;Clustering;Ship Wake
Report Number
DRDC-RDDC-2019-C118 — Contract Report
Date of publication
01 Jun 2019
Number of Pages
83
DSTKIM No
CA049561
CANDIS No
810350
Format(s):
Electronic Document(PDF)

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