Seismic Reflection/Refraction Data at the Academic Seismic Portal
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Maurice Ewing
Processed
Acquisition Information
Processed Data Sets
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Seismic:Reflection:MCSData at USGS
Platform Info
Array:Maurice Ewing
LDEO
Device Info
Seismic:
LDEO
Locale
File Format
HTML
Brocher, Thomas
USGS
Event Logs
Device Info
Related DevicesSeismic:
Platform: Maurice Ewing (Array)
Brocher, Thomas
USGS
Seismic Acquisition Parameters
EW9415_ACQ001 (Lines: Lines Sequence 01-08,10-17)
Source Information
AirGun (BOLT)
Source Number: 1
Volume (cu in): 8470
Pressure (psi): 2000
Shot Interval (m): 50
Distance to Near Channel (m): 187.5
Distance to Antenna (m): 87.4
Number of Arrays: 1
Receiver Information
Hydrophone:Streamer
Number of Cables: 1
Channels Per Cable: 180
Channels Recorded: 160
Group Spacing (m): 25
Cable Length (m): 4000
Near Channel Number: 160
Used Active Tail Buoy: false
Used Compass Birds: true
Nav System
GPS
WGS84
Acquisition System
Digital
Name: DMS2000
Sample Interval (msec): 2
Record Length (sec): 16
Details
Streamer Depth was 10-12m
Source Depth was 8-10m
If, when shooting by Distance, currents caused the shot interval to be less than 19 secs, the shot control was switched to Time with a shot interval of 20s. This first occurred on Sequence 5 at 289/0353 (see cruise report).
EW9415_ACQ002 (Lines: Line Sequence 9)
Source Information
AirGun (BOLT)
Source Number: 1
Volume (cu in): 8470
Pressure (psi): 2000
Shot Interval (sec): 90
Distance to Near Channel (m): 187.5
Distance to Antenna (m): 87.4
Number of Arrays: 1
Receiver Information
Hydrophone:Streamer
Number of Cables: 1
Channels Per Cable: 180
Channels Recorded: 160
Group Spacing (m): 25
Cable Length (m): 4000
Near Channel Number: 160
Used Active Tail Buoy: false
Used Compass Birds: true
Nav System
GPS
WGS84
Acquisition System
Digital
Name: DMS2000
Sample Interval (msec): 2
Record Length (sec): 16
Details
Streamer Depth was 10-12m
Source Depth was 8-10m
edu.utexas.ig:ew9415_acq001 (Lines: )
Source Information
AirGun
Receiver Information
Hydrophone:Streamer
Used Active Tail Buoy: false
Used Compass Birds: false
Nav System
GPS
WGS84
Acquisition System
Digital
Name: DMS 2000
Details
Receiver Type: Hydrophone_Streamer
Source Type: SeismicSource_Gun_Air
Acquisition System Name: DMS 2000
Acquisition System Type: digital
Seismic Nav System: GPS
Survey Datum: WGS84
Source to Near Channel (m): 162.5
Antenna to Source (m): 87.4
Number of Channels Recorded: 160
Channel Length (m): 25
Cable Receiver Depth (m): 10-12 m
Source Volume (cubicInches): 8470
Source Pressure (bars): 136.4
Source Number: 20
Source Depth (m): 11-Aug
Shot Control: time
Shot Interval (s or m): 20: except Line 3 (strong currents caused an increase in ship speed over the ground decreasing the shot time interval to less than then 19 seconds)
Compass Birds: no
Tail Buoy Positioning: no
Recording Delay: no
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