Abstract
A new radar system invented by the author and his colleagues provides a novel solution to the problem of automatic navigation along a confined waterway. The system is called “Polarimetric Radar for Accurate Navigtion” (PRAN) as it exploits polarization. The heart of the system is a retro-reflector that changes the polarization of the incident electromagnetic signal through 90°.
The PRAN system uses a dual-polarized antenna (located on board the ship) and a series of reflectors located at strategic points along the shore of the waterway. It operates by transmitting a horizontally polarized signal; each reflector rotates the polarization of the incident signal by 90°; and the resulting echo is picked up by the ship’s radar on its vertically polarized antenna. The use of polarization effectively eliminates the clutter produced by natural and man-made objects located along the shores.
An experimental PRAN system (using off-the-shelf components) has been set up at a site located on Hamilton Harbour. Results of experiments conducted there confirm that the system does locate the reflectors, despite the presence of clutter produced by the surrounding environment.
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References
A. Macikunas, S.Haykin, T. Greenlay, “Trihedral Radar Reflector,” Patent applied for November 22, 1984, File No. 265- 8007-1.
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© 1987 Marine Technology Society
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Haykin, S. (1987). Polarimetric Radar for Accurate Navigation. In: Proceedings International Symposium on Marine Positioning. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-3885-4_7
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DOI: https://doi.org/10.1007/978-94-009-3885-4_7
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-8226-6
Online ISBN: 978-94-009-3885-4
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