ASA 125th Meeting Ottawa 1993 May

2aAO11. Performance stability of high-resolution matched-field processors to array-element location error in a shallow-water environment.

Howard A. Chandler

G. B. Smith

C. Feuillade

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

The effects of array-element location errors on the performance of four matched-field processing algorithms (Bartlett, maximum likelihood, sector focusing, and multiple constraint) have been investigated. The SNAP propagation model was used to generate the replica acoustic pressure field for a shallow-water channel with a depth variable sound-speed profile typical of a mid-latitude 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 were then correlated using the four algorithms for selected degrees of array deformation error. Results will be presented.