A Study of the Sensitivity of the Greenland Sea Acoustic Tomography
Abstract
An acoustic tomography array consisting of six transceiver moorings was jointly deployed by Woods Hole Oceanographic Institution and Scripps Institution of Oceanography in the Greenland Sea during the second half of 1988. Two of the primary objectives of this thesis are: (1) to set up and test a stochastic 3-D inversion code for the Greenland Sea Acoustic Tomography data analysis; and (2) to evaluate the performance of the acoustic system through resolution and variance analyses. In acoustic tomography, the sound speed perturbation field is estimated from measured acoustic travel time perturbation data. A unique sound speed perturbation estimate can be constructed using the Gauss-Markoff theorem. However, the theorem requires the specification of the covariance of the sound speed perturbation field, which is generally not exactly known. Via computer simulation, we examined the sensitivity of the estimate to uncertainty in the sound speed field correlation specified. In addition, we also examined the effects of an increased random experimental noise level and a change in array geometry due to mooring failure on the estimate. Theses.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1989
- Accession Number
- ADA225406
Entities
People
- Chih-chung Kao
Organizations
- Naval Postgraduate School