ASA 128th Meeting - Austin, Texas - 1994 Nov 28 .. Dec 02

3pUW4. Performance stability of broadband matched-field processors subjected to sound speed and array-element location error in a shallow-water environment.

Howard A. Chandler

Murty Akundi

G. B. Smith

Naval Res. Lab., Stennis Space Center, MS 39529-5004

The effects of array-element location errors on the performance of the three broadband matched-field processing algorithms (Bartlett, maximum likelihood, and sector focusing) have been investigated. The KRAKEN propagation model was used to generate the replica acoustic pressure field at multiple frequencies for a shallow-water channel with a depth variable sound-speed profile typical of a midlatitude summer environment. It was also used to simulate a ``detected'' field due to an acoustic source in the presence of both uncorrelated and correlated (modal) noise. These fields were then correlated using the three algorithms for selected degrees of sound speed and array deformation error. Results will be presented. [Work sponsored by the Office of Naval Research, Program Element 61153N, with technical management provided by NRL-SSC.]