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Sponsored by: United States
Department of Agriculture via
Argonne National Laboratory
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Seismic Data Processing
at Milford, Nebraska, 1999
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Area Overview |
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Seismic
Recording |
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VSP
Recording |
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Data
Processing |
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Seismic Recording Parameters:
The seismic data were recorded by Bay Geophysical Associates between June 14 and June 20, 1999. A total of four profiles were acquired designated lines Milford-99-1A, Milford-99-2, Milford-99-4, and Milford-99-5. Prior to production acquisition a test line was collected and analyzed in the field to determine the optimum recording parameters.
(Seismic Recording along Line Milford-99-2)
Recording Parameters:
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Type of Survey
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Shear wave reflection (single component transverse to
line direction)
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Station Interval
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2 feet
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Source
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Industrial Vehicles International (IVI) MiniVib
high-frequency vibrator 6000 lb. peak force
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Source Interval
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2,2, 4 feet (shoot 2 of every 3 stations)
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Type of Sweep
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Linear
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Sweep Frequencies
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30 – 200 Hz
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Sweep Taper
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Start = 0.35 s, End = 0.1 s
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Sweep Length
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4 s
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Source Offset (Pad)
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6 feet nominal
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Record Length
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5 s
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Listen Time
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1 s (5 s RL – 4 s Sweep)
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Recording Instrument
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OYO DAS-1, 24 bit A/D resolution
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Number of Recording Channels
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144
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Data Format
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SEG-D 8048
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Instrument Gain
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48 db
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Field Correlator
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Seisnet system: correlation, real time tape backup, and
field display system
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Sample Interval
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0.5 ms
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Data Redundancy (CDP fold)
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48
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Geophones
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Geospace SMC-70 40 Hz horizontal, 1 per station
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Cable Geometry
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143.0'-1.0’-VP-1.0’-143.0'
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Page
maintained by: Mark Evans, Last update: April 10, 2008
Copy right @ 2001 University of South Carolina Board of Trustees
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