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Synchronization of seismic data acquisition systems

  • US 20070253289A1
  • Filed: 05/24/2007
  • Published: 11/01/2007
  • Est. Priority Date: 10/04/2002
  • Status: Active Grant
First Claim
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1. A method of operating a seismic survey network comprising the steps of:

  • a. connecting one or more seismic sensors having respective specific identities to a respective data acquisition module for transmission of seismic data to said respective data acquisition module, said data acquisition module being equipped with a first clock;

    b. at predetermined time intervals, said data acquisition module being operative to transmit digital data packets comprising the instantaneous amplitude value of seismic data received by said data acquisition module, each data packet being further distinguished by the identity of the seismic sensor source of respective data and a first clock time of the moment said respective data is received by said data acquisition module;

    c. transmitting said data packets along a first increment of a data transmission route from a first such data acquisition module to an other data processing module;

    d. retransmitting said data packets by said other data processing module along a second increment of said data transmission route to a central data processing unit equipped with a second clock;

    e. from said central data processing unit, transmitting a clock synchronization signal at predetermined time intervals to said other data processing modules along said transmission route in a transmission direction opposite to said seismic data packets, said clock synchronization signal corresponding to the time of said second clock; and

    , f. retransmitting said clock synchronization signal by said other data processing module to said first data acquisition module.

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