Signal Processing and Preliminary Results in the 1988 Monterey Bay Tomography Experiment
Abstract
Ocean acoustic tomography is particularly suited to observing mesoscale dynamic processes, which may not be adequately observed by more conventional methods. Ships and buoys are limited in their sampling rates by location and/or transit speed while the tomographic signal samples the current and temperature fields all along its path at the speed of sound. Variation in the travel time of the signal occurs due to inhomegeneity in either the sound speed or current. The ocean's fluctuation can then be estimated from the travel time perturbation using mathematical inverse methods. The 1988 Monterey Bay Tomography Experiment has several specific goals: to test new technology for real-time transmission of tomographic data to shore, to examine the feasibility of doing acoustic tomography in a coastal environment, and to examine the effects of coastal ocean processes such as surface and internal waves and a rough bottom on the tomography signal. This thesis concentrates on signal design using maximal-length sequences, data recording, and a fast algorithm for a data-synchronous digital correlator receiver in this experiment. The new tomographic data recording system has demonstrated its effectiveness. (RRH)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1989
- Accession Number
- ADA213052
Entities
People
- Robet C. Dees
Organizations
- Naval Postgraduate School