Real Time System for Practical Acoustic Monitoring of Global Ocean Temperature
Abstract
Work completed includes the algorithms which calculate the loss for geometric and diffracted rays. An algorithm was written which does not generate extraneous eigenrays. Work on the calculation of acoustic travel times using ocean models is also on schedule. Multi-year runs of the wind driven equatorial Pacific model have been completed, allowing for the extraction of the Kelvin wave signal. Remote-forced NE Pacific (NEP) model runs have been completed for 1961-1991. Two main features appear in these calculations. (1) When realistic bottom topography is included, cyclonic eddies form on the American coast, and slowly propagate westward. (2) Kelvin waves from El Nino events produce Rossby waves with amplitude much larger than in non-El Nino years and therefore should significantly effect acoustic travel times. Algorithms for calculating the travel time from acoustic source to receiver have been developed for great circle paths. All elements of the SSAR development are well underway. The array design (spacing and number of hydrophones) is complete, as is the optimum depth determination.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 15, 1993
- Accession Number
- ADA267868
Entities
Organizations
- Woods Hole Oceanographic Institution