Sean M. Reilly
Tracor Appl. Sci., Inc., Anal. and Simul. Dept., 35 Thomas Griffin Rd., New London, CT 06320
Standard bottom reverberation models such as Lambert's rule and
perturbation theory assume that scattering from the rough water/bottom
interface is the dominant mechanism at all sonar frequencies. However, direct
path bottomscattering strength measurements by the Critical Sea Test (CST)
program in the 100- to 1000-Hz frequency range suggest that volume scattering
from within the sediments may be the dominant reverberation mechanism in many
applications. The CST program has been actively investigating a number of new
bottom reverberation models which include scattering from within the sediments
[Mourad et al., APL/UW Tech. Rep. No. 9107 (1991); Holland et al.,