Optimal Ocean Acoustic Tomography and Navigation With Moving Sources

Abstract

Ocean Acoustic Tomography inverts for the two- or three-dimensional sound speed structure in a volume of water by measuring acoustic travel times along ray paths traversing the volume. The sensitivity of the acoustic travel times to particular modes of sound speed variation is highly dependent on the source and receiver positions. Autonomous underwater vehicles provide mobile instrument platforms at relatively low cost. Tomography sources mounted on AUVs can be adaptively repositioned to better image emerging sound speed features. The goal of optimal moving source tomography is to make optimal use of mobile controllable tomography sources in gaining information about the environment. The component technologies for optimal moving source tomography are position estimation, sound speed parameterization and estimation, ray path identification, and vehicle path optimization. This thesis makes contributions in each of these areas.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1997
Accession Number
ADA331756

Entities

People

  • Max Deffenbaugh

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Energy and Power Technologies
  • Ground and Sea Platforms
  • Sensors

DTIC Thesaurus Topics

  • Acoustic Tomography
  • Autonomous Underwater Vehicles
  • Detection
  • Detectors
  • Electrical Engineering
  • Engineering
  • Estimators
  • Measurement
  • Motion Planning
  • Ocean Acoustic Tomography
  • Oceanography
  • Oceans
  • Optimal Estimators
  • Random Variables
  • Signal Processing
  • Three Dimensional
  • Topography

Readers

  • Acoustical Oceanography.
  • Adaptive Control and Estimation with Uncertainty in Dynamic Systems.
  • Wave Propagation and Nonlinear Chaotic Dynamics.