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Open AccessTechnical Note

Micro-Motion Estimation of Maritime Targets Using Pixel Tracking in Cosmo-Skymed Synthetic Aperture Radar Data—An Operative Assessment

1
Electromagnetic Laboratory, Engineering Faculty, University of L’Aquila, 67100 L’Aquila, Italy
2
Science and Technology for Transportations Faculty, Università degli Studi “Giustino Fortunato”, viale Raffale Delcogliano, 12, 82100 Benevento, Italy
3
Engineering Faculty, Università degli Studi “Niccolò Cusano”, Via Don Carlo Gnocchi, 3, 00166 Roma, Italy
4
Centre for Signal and Image Processing, Department of Electronic and Electrical Engineering, University of Strathclyde, Glasgow G1 1XW, UK
*
Author to whom correspondence should be addressed.
Current address: Via Luca Benincasa 21/B 06073 Corciano Perugia (Italy).
Remote Sens. 2019, 11(14), 1637; https://doi.org/10.3390/rs11141637
Received: 20 May 2019 / Revised: 2 July 2019 / Accepted: 4 July 2019 / Published: 10 July 2019
(This article belongs to the Special Issue Exploitation of Synthetic Aperture Radar Targets Velocities)
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Abstract

In this paper, we propose a novel strategy to estimate the micro-motion (m-m) of ships from synthetic aperture radar (SAR) images. To this end, observe that the problem of motion and m-m detection of targets is usually solved using synthetic aperture radar (SAR) along-track interferometry through two radars spatially separated by a baseline along the azimuth direction. The approach proposed in this paper for m-m estimation of ships, occupying thousands of pixels, processes the information generated during the coregistration of several re-synthesized time-domain and not overlapped Doppler sub-apertures. Specifically, the SAR products are generated by splitting the raw data according to a temporally small baseline using one single wide-band staring spotlight (ST) SAR image. The predominant vibrational modes of different ships are then estimated. The performance analysis is conducted on one ST SAR image recorded by COSMO-SkyMed satellite system. Finally, the newly proposed approach paves the way for application to the surveillance of land-based industry activities. View Full-Text
Keywords: along-track interferometry; COSMO-Skymed; frequency modes; micro-motion (m-m); staring spotlight; synthetic aperture radar; sub-pixel offset tracking; vibrations along-track interferometry; COSMO-Skymed; frequency modes; micro-motion (m-m); staring spotlight; synthetic aperture radar; sub-pixel offset tracking; vibrations
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Biondi, F.; Addabbo, P.; Orlando, D.; Clemente, C. Micro-Motion Estimation of Maritime Targets Using Pixel Tracking in Cosmo-Skymed Synthetic Aperture Radar Data—An Operative Assessment. Remote Sens. 2019, 11, 1637.

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