Acoustic mapping system using tomographic reconstruction

Details Acoustic mapping system using tomographic reconstruction Acoustic mapping system using tomographic reconstruction

1989-09-20

1991-02-19

Tarcza, Thomas H.

Communications, electrical: acoustic wave systems and devices

Distance or direction finding

With time interval measuring means

367124, 367902, G01S 1500

Patent

active

049950118

ABSTRACT:
A technique for the non-intrusive position determination of one or more natural or artificial acoustic transmitters (S1, S2, S3) in marine or terrestrial environments by processing data from five or more receivers (R1, R2, R3, R4, R5) distributed in the area. The data processing includes cross correlation (24) of receiver data to determine differences in acoustic data travel times (MTTD) and tomographic reconstruction (16) to determine transmitter position as well as receiver position (42), wind or current (40) and sound speed or temperature fields (44) and errors (41) associated with all of the above. Accuracy can be greatly enhanced by use of calibration transmissions at receiver or other known or unknown position locations. Position and wind, sound speed and error fields may conveniently be displayed by computer generated maps (18, 20, 22, 43).

REFERENCES:
Watkins and Schevill, "Four Hydrophone Array for Acoustic Three-Dimensional Location", Woods Hole Oceanographic Institution Technical Report 71-60, 1971.
B. D. Cornuelle, "Simulations of Acoustic Tomography Array Performance with Untracked or Drifting Sources and Receivers", J. Geo. Res. 90 (C5), pp. 9079-9088, 1985.

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