SPHERICAL SCATTERING OF SUPERPOSITIONS OF LOCALIZED WAVES

We investigate, for purposes of remote sensing, the spherically backsc attered spectra of acoustic realizations of localized wave solutions t o the homogeneous wave equation. The solutions represent broadband foc used interference patterns whose focusing properties have been demonst rated to be superior to those of equivalent monochromatic (i.e., cw) s olutions, in the context of multi-time-derivative transmit-receive sys tems. The interference patterns are acoustically launched with a synth etic hydrophone array. The backscattered spectra of several different sized steel and aluminum spheres have been obtained. Analysis indicate s that the sphere radius can be readily extracted from these spectra.