Accession Number:

ADA213052

Title:

Signal Processing and Preliminary Results in the 1988 Monterey Bay Tomography Experiment

Descriptive Note:

Master's thesis

Corporate Author:

NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s):

Report Date:

1989-06-01

Pagination or Media Count:

190.0

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 andor 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 oceans 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

Subject Categories:

  • Physical and Dynamic Oceanography
  • Recording and Playback Devices
  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE