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Sponsored by: United States
Department of Agriculture via
Argonne National Laboratory
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Seismic Data Processing
at Ceresco, Nebraska, 1998
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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 July 28 and August 6, 1998. A total of four profiles were acquired using a 144 channel seismograph and a vibrator source. Part of Line 1 was collected using a sledge hammer source where the vibrator was denied access.
(Seismic Recording along Line 1)
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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3
feet
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Source
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Industrial
Vehicles International (IVI)
MiniVib high-frequency
vibrator 6000 lb. peak
force
Hammer
(Line 1 only, easternmost
70 feet)
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Source
Interval
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3
feet
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Type
of Sweep
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Linear
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Sweep
Frequencies
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25
– 225 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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6
s
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Source
Offset (Pad)
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3
feet nominal
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Hammer
(Line 1 only)
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4
lb., 16 hits right, 16
hits left
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Record
Length
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7
s
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Listen
Time
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1
s (7 s RL – 6 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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Instrument
Gain
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48
db
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Data
Format
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SEG-D
8048
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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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72
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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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214.5’-1.5’-VP-1.5’-214.5’
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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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