NDLI: Radar characterization of ship wake signatures and ambient ocean clutter features

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Proceedings of the 1989 IEEE National Radar Conference (Cat. No.89CH2685-6)

Proceedings of the 1988 IEEE National Radar Conference

Radar characterization of ship wake signatures and ambient ocean clutter features

Content Provider	IEEE Xplore Digital Library
Author	Schurmann, S.R.
Copyright Year	1989
Description	Author affiliation: XonTech. Inc., Van Nuys, CA, USA (Schurmann, S.R.)
Abstract	Matched filters based on empirical wake-signature models were applied to SIR-B SAR (Shuttle Imaging Radar-B synthetic-aperture radar) images and produced peak SNR (signal-to-noise ratio) values of 17-21 dB, demonstrating that wake signatures can be successfully exploited for ship detection. A battery ( approximately 100) of filters can determine the ship direction to within several degrees. Empirical wake signature models were also tested in a wake orientation algorithm that calculates the angular cross-correlation between the power spectrum of the model and that of a SAR image. The algorithm correctly determines wake angles (with 180 degrees ambiguity) with SNR values comparable to the matched filter. Data from a land-based, X-band, coherent real-aperture radar (which overlooks the ocean) were processed to obtain ocean surface Doppler velocities as a function of range and time. Line-of-sight orbital currents of ocean waves are easily detected, and the power in the velocity-field spectrum is concentrated on the dispersion curve for free-surface gravity waves. Cuts taken along this curve produce quantitative wave spectra for the study of ocean surface features and ship-induced wake modifications of the surface.
Starting Page	182
Ending Page	187
File Size	567047
Page Count	6
File Format	PDF
DOI	10.1109/NRC.1989.47638
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1989-03-29
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Marine vehicles Oceans Radar imaging Sea surface Matched filters Radar detection Surface waves Synthetic aperture radar Signal to noise ratio Batteries
Content Type	Text
Resource Type	Article

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