## 2aUW11. Near-field scattering through and from a 2-D fluid-fluid rough interface.

### Session: Tuesday Morning, May 14

### Time: 11:20

**Author: John E. Moe**

**Author: Darrell R. Jackson**

**Location: Appl. Phys. Lab., College of Ocean and Fishery Sciences, Dept. of Elec. Eng., Univ. of Washington, Seattle, WA 98105**

**Abstract:**

A general analytical expression for the time-dependent field intensity
scattered from or through (penetrating) a 2-D fluid-fluid rough surface due to a
narrow-band incident plane wave and a narrow-band point source are derived and
expressed in terms of the bistatic scattering cross section per unit area of the
rough surface. Even though the scattering cross section is defined as a
far-field quantity, this near-field result is general and exact for the special
case of a continuous wave source and incident plane wave. Dispersion of a pulse
is a function of medium parameters, the incident and scattered directions, as
well the bandwidth and center frequency of the source signal. First-order
perturbation calculations for the case of a Gaussian pulse illustrate intensity
pulse dispersion effects due to forward scattering into a lossy sediment. [Work
supported by ONR.]

from ASA 131st Meeting, Indianapolis, May 1996