William S. Hodgkiss
James J. Murray
Gerald L. D'Spain
Katherine H. Kim
Marine Physical Lab., Scripps Inst. of Oceanogr., La Jolla, CA 92093-0701
Newell O. Booth
Philip W. Schey
Joe Rice
NCCOSC RDTE DIV Code 541, San Diego, CA 92152-5001
A broadband adaptive beamforming detection performance comparison is presented for a vertical array with matched-field replica vectors and a horizontal line array with plane-wave replica vectors. The data analyzed consists of both multitone (50--200 Hz) and full broadband (75--150 Hz) transmissions recorded during SWellEx-3 (shallow water evaluation cell experiment 3). SWellEx-3 was carried out in July 1994 west of Point Loma in approximately 200-m-deep water. A MPL vertical array was deployed from the R/P FLIP and the NRaD SWSS (shallow water sensor string) horizontal line array was co-deployed 500 m to the east. Source tows (multitone transmissions) and stations (full broadband transmissions) were carried out at various levels spanning a 22- and 16-dB dynamic range, respectively. Radar data will be included indicating the location and dynamics of interfering noise sources from shipping traffic in the area. [Work supported by ONR, Code 321US.]