New mobile acoustic sensor arrays are being developed to address the changing requirements for submarine surveillance. Recent measurements from a new experimental towed array 3.5 nmi long determined that the deep ocean will support coherent acoustic propagation at very low frequencies. Thus, an aperture of that length could be used effectively for open-ocean surveillance, but its performance can be severely limited by operational and water depth constraints in littoral environments. A higher-frequency twin-line array is being developed to achieve higher gains in coastal regions with reduced horizontal signal coherence and additionally to resolve the left-right ambiguity inherent in single-line arrays.
|Original language||English (US)|
|Number of pages||8|
|Journal||Johns Hopkins APL Technical Digest (Applied Physics Laboratory)|
|State||Published - Apr 1 1993|
ASJC Scopus subject areas
- Physics and Astronomy(all)