Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Land-reflection type
Patent
1979-09-12
1981-07-28
Moskowitz, Nelson
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
Land-reflection type
367 79, 370103, 328 72, G01V 124
Patent
active
042814030
ABSTRACT:
A decentralized seismic data recording system includes a central station and a plurality of remote seismic recording units that are incommunicado with the central station during a normal recording operation. A master clock is provided in the central station. A local clock is provided in each remote recording unit. At the beginning of a work period, the local clocks are synchronized with the master clock. Thereafter, a plurality of seismic data recordings are made. At the end of a work period, the time difference due to tuning drift between the master clock and each respective local clock is ascertained and is recorded. The time difference is linearly prorated over the recordings made during the work period, thereby synchronizing the time base of each seismic data recording with the master clock. Provision is made to validate each seismic data recording to prevent accidental recording of false data in event of a misfire or a non-fire of the seismic source.
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Ibrahim et al. "A Comparison . . . Shelf Zone," 4/78, pp. 514-527, Geophysics, vol. 43, #3.
Porter James A.
Siems Lee E.
Knox William A.
Litton Resources Systems, Inc.
Moskowitz Nelson
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