Method and apparatus for verifying the location of a seismic bot

Details Method and apparatus for verifying the location of a seismic bot Method and apparatus for verifying the location of a seismic bot

1995-05-05

1996-03-05

Pihulic, Daniel T.

Communications, electrical: acoustic wave systems and devices

Transponders

With plurality of transponders

367 19, 367130, G01V 138

Patent

active

054973562

ABSTRACT:
One or more slave acoustic transponders are secured to selected parts of a seismic bottom cable whose location is imperfectly known. A master transponder broadcasts an interrogation pulse from each of a number of different, known locations distributed along a line of survey. In response to an interrogation pulse, a slave transponder emits an encoded signal that is received by the master transponder. The acoustic flight time between each pulse broadcast and encoded-signal reception constitutes a range measurement to the participating slave transponder. Resolving a gather of several range measurement from different known broadcast locations, focussed on an identifiable transponder, defines the transponder location.

REFERENCES:
patent: 4446538 (1984-01-01), Zachariadis
patent: 4532617 (1985-07-01), Baecker et al.
patent: 4641287 (1987-02-01), Neeley
patent: 4912682 (1990-03-01), Norton, Jr. et al.
patent: 5128904 (1992-07-01), Chambers
Cross, P. A. Kalman Filtering and its Application to Offshore Position-Fixing, paper presented at Hydro '86, the Fifth Biennial International Symposium of the Hydrographic Society, Dec. 1986, Southampton, England, pp. 19-25 (The Hydrographic Journal No. 44, Apr. 1987).

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