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Multi-vessel timing synchronization method and device

  • US 5,650,981 A
  • Filed: 01/06/1993
  • Issued: 07/22/1997
  • Est. Priority Date: 01/06/1993
  • Status: Expired due to Term
First Claim
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1. A process for synchronizing a first event on a first marine seismic vessel system and a second event on a second marine seismic vessel system, comprising:

  • assigning a first instant in time for the occurrence of the first event;

    assigning a second instant in time for the occurrence of the second event;

    sending a time-event signal from the first marine vessel system to the second marine vessel system, wherein the time-event signal includes data identifying the event and the first instant;

    providing an acknowledge signal from the second marine vessel system upon receipt of the time-event signal;

    repeating said sending until receipt of the acknowledge signal at the first marine vessel;

    determining on the first marine vessel system the first instant from a time reference to cause the first event to occur on the first marine vessel system at the first instant; and

    determining on the second marine vessel system the second instant from the time reference to cause the second event to occur on the second marine vessel system at the second instant, wherein the time reference used for said determining the first instant is the same time reference used for said determining the second instant.

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