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- W652364450 abstract "Calculations of radar scatter images from simulated ships wakes are presented for two ships, the QUAPAW and a Destroyer class vessel. Two radar scattering mechanisms are used: Bragg scatter and an empirical sea spike model. No Doppler effects are considered (important to SAR image formation) so that the model is one for a real-aperture radar. Both vertical and horizontal transmit polarisations were used, with like polarisations received, for a single depression angle of 45 degrees. Two flight aspects were considered: parallel and perpendicular to the axis of the wake, with the radar beam perpendicular to the direction of flight. Simulated wake elevations and slopes are calculated using the slender ship method published recently by Keramidas (1987). The results show a relatively weak modulation from the Bragg scatter contribution, which would probably be masked by moderate sea conditions. The most significant result is the occurrence of the maximum image brightness from a narrow V-wake. This return is associated with large gravity wave slopes predicted by the slender-ship model for hydrodynamic calculations, and is significant only for flight aspects parallel to the wake axis. For perpendicular flight aspect, the radar image consists primarily of the Bragg return for both polarisations and yields only the Kelvin wake. Suggestions are made for improving both the radar scatter model and the hydrodynamic model." @default.
- W652364450 created "2016-06-24" @default.
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- W652364450 date "1988-01-01" @default.
- W652364450 modified "2023-10-06" @default.
- W652364450 title "SIMULATION OF REAL-APERTURE RADAR IMAGES USING SHIP WAKE NUMERICAL MODELS" @default.
- W652364450 hasPublicationYear "1988" @default.
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