Acoustic backscattering at low grazing angles from the ocean bottom. I. Bottom backscattering strength

Ocean Surface Backscattering at Extremely Low Grazing Angles Observed by C-band Polarimetric Doppler Weather Radar

RADAR A C-band (5.34 Ghz) multi-parameter radar has been operated in the Okinawa Subtropical Remote Sensing Center, National Institute of Information and Communications Technology (NICT), Japan. It is a full-polarimetric radar with Doppler measurement capability, located on the top of a mountain in the center of the Okinawa Island (128.06oE, 26.59oN, 360m above sea level), southernmost part of ...

Observation of sunlight enhanced backscattering from the sea bottom near the beach

The paper describes a natural manifestation of the enhanced backscattering effect in conditions when sunlight is scattered by the sea bottom covered by shallow rippled water. In this system the water surface plays the role of a phase screen that focuses the light on the bottom, while the sandy bottom acts as a set of random single scatterers.

Acoustic Wave Backscattering in a Random Inhomogeneous Ocean Sediment

The backscattering of sound by inhomogeneities of the ocean sediment may provide a remarkable effect on underwater acoustic wave propagation. It may also be used as a means of remotely estimating complicated sediment properties. In this paper, a theoretical model of acoustic waves backscattered from an inhomogeneous sediment is formulated based on the Born approximation. The model not only cont...

Bottom backscattering coefficient estimation from wideband chirp sonar echoes by chirp adapted time-frequency representation

This work is concerned with the estimation of the bottom backscattering coefficient as a function of frequency and of incident angle. Generally, the backscattering coefficient is studied for a given frequency at various angle. But the backscattering depends not only on the angle, but also on the frequency. In our work, a wideband chirp sonar (20140kHz) with -3dB half-angle 12o has been used to ...

Bottom Backscattering Measured Off the Carolina Coast During the Littoral Warfare Advanced Development 98-4 Experiment