Seismic Reflection/Refraction Data at the Academic Seismic Portal
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Expeditions / Compilations
Robert D. Conrad
Processed
Raw
Acquisition Information
Processed Data Sets
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Bathymetry:Swath
Data DOI:
10.26022/IEDA/319221
Processed ship-based Multibeam Sonar Data (version 2) acquired along the East Pacific Rise (EPR) Spreading Center during the Robert D. Conrad expedition RC2607 (1985)
Platform Info
Robert D. Conrad
LDEO
Device Info
Sonar:
SeaBeam:Classic
Locale
File Format
MBSystem
Quality
2
GMRT,
Raw Data Sets
Sort by:
Bathymetry:SwathData at NOAA:NCEI
Platform Info
Robert D. Conrad
LDEO
Device Info
Sonar:
SeaBeam:Classic
Locale
File Format
MBSystem
Quality
0
Detrick, Robert
URI
Platform Info
Robert D. Conrad
LDEO
Device Info
Sonar:
SeaBeam:Classic
Locale
File Format
MBSystem
Quality
0
Detrick, Robert
URI
Event Logs
Device Info
Related DevicesSeismic:
LDEO
Platform: Robert D. Conrad (Array)
Detrick, Robert
URI
Seismic Acquisition Parameters
RC2607_ACQ001 (Lines: 506,522,533-587 (CDP Lines 01-57) Conrad only)
Source Information
AirGun (BOLT)
Source Number: 4
Volume (cu in): 1864
Pressure (psi): 2000
Depth (m): 3
Shot Interval (sec): 20
Distance to Near Channel (m): 280
Distance to Antenna (m): 48
Number of Arrays: 1
Receiver Information
Hydrophone:Streamer
Number of Cables: 1
Channels Per Cable: 48
Channels Recorded: 48
Group Spacing (m): 50
Cable Length (m): 2400
Cable Depth (m): 12
Near Channel Number: 48
Used Active Tail Buoy: false
Used Compass Birds: false
Nav System
GPS, Transit Satellite
WGS72
Acquisition System
Digital
Name: DFSIV
Sample Interval (msec): 4
Record Length (sec): 12
Details
ACQ001 - CDP lines (Conrad only)
RC2607 was a 2-ship cruise with the R/V Thomas Washington. The line numbers assigned at sea were incorrect. Add 4 to the cruise-report line number
to get the line number used in the archived filename.
The CDP and WAP segy files are archived as cdp gathers (25 meter bins). The shot number for each trace is in bytes 9-12 of the SEG-Y trace header.
RC2607_ACQ002 (Lines: 507-515,523-532 (WAP 01-13))
Source Information
AirGun (BOLT)
Source Number: 4
Volume (cu in): 1864
Pressure (psi): 2000
Depth (m): 3
Shot Interval (sec): 30
Distance to Near Channel (m): 280
Distance to Antenna (m): 48
Number of Arrays: 1
Receiver Information
Hydrophone:Streamer
Number of Cables: 1
Channels Per Cable: 48
Channels Recorded: 48
Group Spacing (m): 50
Cable Length (m): 2400
Cable Depth (m): 12
Near Channel Number: 48
Used Active Tail Buoy: false
Used Compass Birds: false
Nav System
GPS,Transit Satellite
WGS72
Acquisition System
Digital
Name: DFSIV
Sample Interval (msec): 4
Record Length (sec): 20
Details
ACQ002 - Wide Aperture reflection Lines 507-515, 523-532 (WAP Lines 01-13)
RC2607 was a 2-ship cruise with the R/V Thomas Washington. The line numbers assigned at sea were incorrect. Add 4 to the cruise-report line number
to get the line number used in the archived filename.
The CDP and WAP segy files are archived as CDP gathers (25 meter bins). The shot number for each trace is in bytes 9-12 of the SEG-Y trace header.
Conrad was the lead ship, followed by Washington at about 5200 meters. The ships alternated shooting. Each ship shot once per min, one ship on the minute, the other on the half minute. Conrad recorded all shots.
The shotnav files for WAP lines include the ship to ship range (antenna to antenna)for that shot and a flag indicating which ship was shooting (1-Conrad or 2-Washington).
Antenna to Source: 48m (Conrad), 42m (Washington)
Source Depth: 3m (Conrad), 5m (Washington)
Source Number: 4 (Conrad), 4 (Washington)
Source Volume: See Cruise Report for Conrad, 2145 cu. in. for Washington
Source Source Pressure: 2000psi (Conrad), 1800psi (Washington)
RC2607_ACQ003 (Lines: 498-505,516-521,530,531 (ESP 01-16))
Source Information
AirGun (BOLT)
Receiver Information
Hydrophone:Streamer
Number of Cables: 1
Channels Per Cable: 48
Channels Recorded: 48
Group Spacing (m): 50
Cable Length (m): 2400
Cable Depth (m): 12
Near Channel Number: 48
Used Active Tail Buoy: false
Used Compass Birds: false
Nav System
Acquisition System
Digital
Name: DFSIV
Details
ACQ003 Expanding Spread Profile Refraction Lines 498-505,516-521,530,531 (ESP Lines 01-16). Various configurations of airguns and explosives were used for ESPs. See cruise report for details.
The line numbers assigned at sea were incorrect. Add 4 to the cruise-report line number to get the line number used in the archived filename.
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