A Thin Line Towed Hydrophone Array and AUV Integration
Abstract
Funds to procure a digital thin line hydrophone array system and to integrate the array system to an acoustic sound source autonomous unmanned vehicle (AUV) are requested to improve the fieldwork capabilities for ocean acoustic studies, especially for the estimation of bottom geoacoustic properties, acoustic detection and localization, and underwater sound propagation physics. The ultimate goal is to enhance the quality of the ocean acoustics research currently funded by the Ocean Acoustics (OA) Program in the Office of Naval Research (ONR). The final integrated acoustic AUV system will consist of one low frequency (centered at 1 kHz) sound source and one thin line towed hydrophone array with 24 channels and a 20-m aperture. The system will be driven by a Chip Scale Atomic Clock (CSAC) for high-precision acoustic measurements and multi-platform synchronization. This AUV system will also have an inertia navigation system, and combined with long-baseline navigation, the acoustic measurements will have both precise time base and accurate positioning. This system can be utilized to directly support future ONR acoustics experiments in shallow water areas. Besides the mentioned applications on bottom geoacoustics, acoustic detection and localization, our scientific objectives in field work experiments also include investigation of acoustic signal variability caused by temporal and spatial ocean environment variability by measuring directional acoustic signals in a 3D space. Combining with other acoustic platforms, we can distinguish different environmental effects by characterizing their temporal and spatial variability patterns.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jun 13, 2019
- Source ID
- N000141912457
Entities
People
- Ying-Tsong Lin
Organizations
- Office of Naval Research
- United States Navy
- Woods Hole Oceanographic Institution