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Automatic refocus and feature extraction of single-look complex SAR signatures of vessels
2016
European Journal of Remote Sensing
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In recent years, spaceborne synthetic aperture radar (SAR) technology has been considered as a complement to cooperative vessel surveillance systems thanks to its imaging capabilities. ...
In this paper, a processing chain is presented to explore the potential of using basic stripmap single-look complex (SLC) SAR images of vessels for the automatic extraction of their dimensions and heading ...
Autofocus step The SAR processing is based on the application of matched filtering in both range and azimuth dimensions to obtain the final image. ...
doi:10.5721/eujrs20164939
fatcat:xvmxolassfdlbilregoihlmsfi
Improving the Image Quality of Moving Ships for GF-3NG Based on Simultaneous AIS Information
2021
Remote Sensing
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Consequently, this paper proposes a novel scheme to improve the imaging quality of moving ships for GF-3NG using AIS information. ...
and an AIS sensor to obtain the SAR images and simultaneous AIS information of ships. ...
Acknowledgments: The authors wish to acknowledge the support of the GF-3 mission, especially the China Centre for Resources Satellite Data and Application, who provides the products of GF-3. ...
doi:10.3390/rs13101951
fatcat:tjujvbf77fhfdjzcqwuv6rdhtq
Integration of Automatic Identification System (AIS) Data and Single-Channel Synthetic Aperture Radar (SAR) Images by SAR-Based Ship Velocity Estimation for Maritime Situational Awareness
2019
Remote Sensing
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Accurate matching of ships detected in SAR images with AIS data requires compensation of the azimuth offset, which depends on the ship's velocity. ...
A case study has been analyzed, in which the method has been tested on TerraSAR-X images collected over the Gulf of Naples, Italy. ...
Positions of vessels in AIS data, interpolated at SAR image epoch, are referred to as AIS-based ship geographic coordinates. ...
doi:10.3390/rs11192196
fatcat:z6wum4c7oner7ed2l73km552em
Non-Linear Modeling of Detectability of Ship Wake Components in Dependency to Influencing Parameters Using Spaceborne X-Band SAR
2021
Remote Sensing
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The detection of the wakes of moving ships in Synthetic Aperture Radar (SAR) imagery requires the presence of wake signatures, which are sufficiently distinctive from the ocean background. ...
The most expressive influencing parameter is the movement velocity of the vessels, as all wake components are more detectable the faster vessels move. ...
Acknowledgments: Special thanks goes to Andrey Pleskachevsky, Hendrik Rothe and James Imber for supporting their knowledge in the field of SAR oceanography, machine learning and statistics during discussions ...
doi:10.3390/rs13020165
fatcat:tbcjdeqrcndibpyvdyh5uk4d5i
Classification-Aided SAR and AIS Data Fusion for Space-Based Maritime Surveillance
2020
Remote Sensing
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Two case studies in the UK are used to evaluate the performance of the classification-aided data association technique based on the types of SAR product used for maritime surveillance: wide-area and large-scale ...
A wide range of research activities exploit spaceborne Synthetic Aperture Radar (SAR) and Automatic Identification System (AIS) for applications that contribute to maritime safety and security. ...
Acknowledgments: The authors would like to thank LuxSpace Sàrl for freely providing the AIS dataset for the English Channel case study. ...
doi:10.3390/rs13010104
fatcat:butinuxm7zcxbkvybtql7w4mvm
Airborne and spaceborne synthetic aperture radar observations of ocean waves
1994
ATMOSPHERE-OCEAN
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Thus, the SAR image spectra derived from ERS-1 are sig-n~cantly more susceptible to velocity bunching non-linearizy and azimut/z spectral cut-off which are well-known limitations of SAR in accurately measuring ...
Airborne and spaceborne SAR measurements of ocean waves are presented and compared with directional wave buoy measurements. ...
Fea (ESA) for ensuring the scheduling and acquisition of the ERS-1 SAR data; F. Dobson (BLO) and his colleagues for their efforts on CSS Hudson and their timely supply of processed data; and R. ...
doi:10.1080/07055900.1994.9649491
fatcat:lmdhiu2y3nh6bgtftaa2rpgg4q
Recent Trend and Advance of Synthetic Aperture Radar with Selected Topics
2013
Remote Sensing
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The second spaceborne SAR following SEASAT-SAR was ERS-1 SAR [8] in 1991 (see Table 2 and Figure 3 ). ...
During the 13 years of interval between these two spaceborne SARs, much effort was made to develop and experiment new techniques with airborne SARs and Shuttle Imaging Radar (SIR) series. ...
Sugimoto of National Defense Academy, Japan for processing ALOS-PALSAR data, and to G.M. Martin of GMV Aerospace, Spain for providing information on ship detection and identification. ...
doi:10.3390/rs5020716
fatcat:mhvchbqksbgpnmywcx6wnkl2lm
DEEP LEARNING FOR VESSEL DETECTION AND IDENTIFICATION FROM SPACEBORNE OPTICAL IMAGERY
2021
ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
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We present a deep learning-based vessel detection and (re-)identification approach from spaceborne optical images. ...
It returns a relevant ranking of candidate vessels from a database when provided an input image for a specific vessel the user might be interested in, with top-1 and top-10 accuracies of 38.7% and 76.5% ...
Ken Wong and Leigh Martin-Boyd are acknowledged for the project management. ...
doi:10.5194/isprs-annals-v-3-2021-303-2021
fatcat:xwmw6ua7l5h7ji5kjqoup5qxhi
Modeling and SAR Imaging of the Sea Surface: a Review of the State-of-the-Art with Simulations
[article]
2022
arXiv
pre-print
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The study is based on well proven concepts: the linear theory of sea surface modeling, Michell thin-ship theory for Kelvin wake modeling, and ocean SAR imaging theory. ...
Despite solid experience in this field, comprehensive knowledge and interpretation of ocean/sea and vessel wave signatures on radar images are still very challenging. ...
Zilman for many enlightening scientific discussions. ...
arXiv:2102.05199v2
fatcat:wxij2hyhtbajbcgg2dygupawvi
A Simultaneous Imaging Scheme of Stationary Clutter and Moving Targets for Maritime Scenarios with the First Chinese Dual-Channel Spaceborne SAR Sensor
2019
Remote Sensing
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Unambiguous imaging, especially for a scene with moving targets, is one of the crucial research topics in the HRWS SAR system. ...
in a traditional SAR system. ...
Acknowledgments: The authors wish to acknowledge the support of the Gaofen-3 mission, especially the China Centre for Resources Satellite Data and Application, which provided the products of GF-3. ...
doi:10.3390/rs11192275
fatcat:4vhopr52qbdtjcmiiz7fdylqrq
Space Remote Sensing and Detecting Systems of Oceangoing Ships
2020
Transactions on Maritime Science
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Identification System (S-AIS), Long Range Identification and Tracking (LRIT), and other current vessel tracking systems. ...
In this paper will be not included a new project known as a Global Ship Tracking (GST) as an autonomous and discrete satellite network designed by the Space Science Centre (SSC) for research and postgraduate ...
In Figure 8 is illustrated an example of localization of further vessels in the area of m/t Enrico Iveoli for possible immediate assistance in SAR and to released activities. ...
doi:10.7225/toms.v09.n02.004
fatcat:xdgljcmt5jatllqqc2hsvdald4
Marine Targets Recognition Through Micro-Motion Estimation from SAR data
2020
2020 IEEE 7th International Workshop on Metrology for AeroSpace (MetroAeroSpace)
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The capability to perform Automatic Target Recognition (ATR) from SAR images has great importance for both civilian and military applications. ...
This paper investigates the possibility to enhance classification capabilities of marine targets in SAR images by exploiting the micro-motion information. ...
In [10] a modified Alexnet structure has been used to design marine targets classification on the Gaofen-3 spaceborne SAR images, achieving an accuracy of 92.10% in classifying six kinds of targets, ...
doi:10.1109/metroaerospace48742.2020.9160210
fatcat:vanc626ipzdwpjd6fhw3mfdxyu
Range-Doppler Based CFAR Ship Detection with Automatic Training Data Selection
2019
Remote Sensing
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Current state-of-the-art synthetic aperture radar (SAR) based ship detection methods employ fully focused images. ...
The time-consuming processing efforts required to generate these images make them generally unsuitable for real time applications. ...
Acknowledgments: The authors would like to thank the anonymous reviewers for their useful comments and suggestions that significantly improved the clarity of the paper. ...
doi:10.3390/rs11111270
fatcat:c2hx2w3bubhjreh64pwd3re45e
Integrated analysis of multi‐sensor datasets and oil drift simulations ‐ a free floating oil experiment in the open ocean
2020
Journal of Geophysical Research - Oceans
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As seen in Table B1 , the noise floor is very low for F-SAR compared with the spaceborne sensors. The noise floor is especially low for the L-band sensor followed by the S-and X-bands in the F-SAR. ...
Based on this study, we recommend to prioritize SAR on aircraft for recovery and preparedness of oil spill operations, where optical data could act as a complementary data source for validation of what ...
Appendix B: Properties of the SAR instruments Properties of the airborne and spaceborne SAR sensors utilized in this study are presented in Table B1 .
Data Availability Statement ...
doi:10.1029/2020jc016499
fatcat:ktc4zgoe2zel7i6n7sap7iilbi
SOME RESULTS FROM THE LABRADOR SEA EXTREME WAVES EXPERIMENT
1988
Coastal Engineering Proceedings
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Directional spectra of gravity waves are obtained with the SAR both in open waters and below an ice cover. Further work is needed in order to verify SAR-measurements with in-situ observations. ...
The research is carried out in order to assess the significance of 3-dimensional sea states in engineering applications. ...
Two working groups are responsible for the performance of the LEWEX-project. These are RSG-1 and RSG-2. A list of participating scientists is found in (BALES, BEAL and FREEMAN 1987) . ...
doi:10.9753/icce.v21.49
fatcat:6k4hzb4aebg6tbsa5lwf35lxmi
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