Method and apparatus for positioning seismic arrays
First Claim
1. In a seismic data recording system including a central station, a plurality of remote seismic data recording units designed for deployment within a desired region relative to the central station and spaced apart according to a desired grid spacing, means within each remote seismic data recording unit for recording at least one channel of seismic data, means for synchronizing seismic data recording cycles of the remote seismic data recording units with seismic signals produced under control of the central station, the improvement comprising:
- means in the central station for receiving and recording electromagnetic positioning signals originating from means external to and independent of said seismic data recording system;
means in each said remote seismic data recording unit for receiving and utilizing only a portion of said electromagnetic positioning signals simultaneously with concurrent recording of said electromagnetic positioning signals in said central station; and
means for combining the electromagnetic positioning signal portions utilized by said remote seismic data recording units with the electromagnetic positioning signals recorded in said central station thereby to derive a differential position relative to said central station.
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Accused Products
Abstract
A seismic data recording system includes a central station and a plurality of remote seismic data recording units that are deployed within a desired region relative to the central station. The differential locations of the remote recording units relative to the central station are determined by receiving and recording electromagnetic positioning signals at the central station. A portion of the electromagnetic positioning signals is concurrently received and recorded at the respective remote recording units. The portion of the positioning signals recorded at each remote recording unit is combined with the recorded positioning signals from the central station to determine the required differential locations.
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Citations
10 Claims
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1. In a seismic data recording system including a central station, a plurality of remote seismic data recording units designed for deployment within a desired region relative to the central station and spaced apart according to a desired grid spacing, means within each remote seismic data recording unit for recording at least one channel of seismic data, means for synchronizing seismic data recording cycles of the remote seismic data recording units with seismic signals produced under control of the central station, the improvement comprising:
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means in the central station for receiving and recording electromagnetic positioning signals originating from means external to and independent of said seismic data recording system; means in each said remote seismic data recording unit for receiving and utilizing only a portion of said electromagnetic positioning signals simultaneously with concurrent recording of said electromagnetic positioning signals in said central station; and means for combining the electromagnetic positioning signal portions utilized by said remote seismic data recording units with the electromagnetic positioning signals recorded in said central station thereby to derive a differential position relative to said central station. - View Dependent Claims (2, 3, 4, 5, 6)
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7. In a seismic data recording system including a central station and a plurality of remote seismic data recording units designed for deployment at desired grid spacings within a selected region with respect to said central station, each said remote seismic data recording unit having means for recording at least one channel of seismic data, means for synchronizing seismic data recording cycles of the remote seismic data recording units with seismic signals generated under control of said central station, an improved method for determining the differential positions of said remote seismic data recording units relative to said central station, comprising the steps of:
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receiving and recording electromagnetic positioning signals at said central station originating from means external to and independent of said seismic data recording system; receiving and utilizing only a portion of said electromagnetic positioning signals at each said remote seismic data recording unit simultaneously with concurrent reception and recordation of said electromagnetic positioning signals at said central station; and combining the electromagnetic positioning signal portions received by said remote seismic data recording units with the concurrently-received electromagnetic positioning signals recorded at said central station. - View Dependent Claims (8, 9, 10)
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Specification