Real Time System for Practical Acoustic Monitoring of Global Ocean Temperature
Abstract
The acoustic multipaths from the Kaneohe source have been identified at one SOSUS station using a ray tracing algorithm called ZRAY. This is the furthest, 4000 km, that ray theory has been successfully used to understand acoustic propagation in the ocean. This further validates that acoustic thermometry is valid at basin-scales and that changes in the travel time from the Kaneohe source are not due to changes in the multipaths. FSU designed an acoustic tomography assimilation scheme for a reduced gravity model, but with spatially variable density. The goal of this effort is to estimate the time independent density field in the upper northeast Pacific ocean. A second test cruise was conducted at the AUTEC Range in August to verify SSAR performance with a 70 Hz source. This test consisted of the deployment of a normal SSAR (snubber design) and a moored SSAR. The moored SSAR was deployed on a subsurface mooring, thus removing surface generated noise. A 70 Hz source transmitted an M- sequence signal and both systems recorded data on hard disk. The normal SSAR also telemetered processed data. In addition, the SSAR acoustic navigation system was tested against the AUTEC Range system. All data were successfully collected and processing of this information is ongoing.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 04, 1994
- Accession Number
- ADA286435
Entities
People
- Daniel E. Frye
- John L. Spiesberger
Organizations
- Woods Hole Oceanographic Institution