Patents Assigned to PGS Ocean Bottom Seismic, Inc.
  • Apparatus and method of calibrating vertical particle velocity detector and pressure detector in a sea-floor cable with in-situ passive monitoring
    Patent number: 5621699
    Abstract: A method of processing data from a co-located hydrophone-geophone pair of seismic receivers of an ocean-bottom cable system. Ambient noise is obtained for the hydrophone and geophone. A relative noise signal is determined by finding the normalized difference between geophone and hydrophone noise signals. Geophone and hydrophone data signals are then scaled by an amount equal to the relative noise signal.
    Type: Grant
    Filed: July 7, 1995
    Date of Patent: April 15, 1997
    Assignee: PGS Ocean Bottom Seismic, Inc.
    Inventors: Timothy B. Rigsby, Joe I. Sanders