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
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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))
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
WGS-72
Acquisition System
Digital
Name: DFSIV
Sample Interval (msec): 4
Record Length (sec): 12
Details
RC2607 was a 2-ship cruise with the R/V Thomas Washington.
Three types of data were collected
ACQ001
CDP: Conrad only reflection Lines 506, 522, 533-587 (CDP Lines 01-57)
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
The line numbers assigned at sea were incorrect. Add 4 to the line number
in the cruise report to get the archived line number.
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
WGS-72
Acquisition System
Digital
Name: DFSIV
Sample Interval (msec): 4
Record Length (sec): 20
Details
RC2607 was a 2-ship cruise with the R/V Thomas Washington.
Three types of data were collected
ACQ002
WAP: Wide Aperture reflection lines 507-515, 523-532
(WAP Lines 01-13)
Conrad was the lead ship, followed by Washington at about 5200 meters.
The ships alternated shooting and the Conrad recorded all shots
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
The shot nav 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)
The line numbers assigned at sea were incorrect. Add 4 to the line number
in the cruise report to get the archived line number
For RC2607_ACQ002 Conrad was the lead ship, Washington was ~5200 meters behind Conrad. Each ship shot once per min, one ship on the minute, the other on the half minute. Conrad recorded shots from both ships.
RC2607_ACQ003 (Lines: 498-505,516-521,530,531 (ESP 01-16))
Source Information
AirGun (BOLT)
Receiver Information
Hydrophone:Streamer
Near Channel Number: 48
Nav System
Acquisition System
Digital
Name: DFSIV
Details
RC2607 was a 2-ship cruise with the R/V Thomas Washington.
Three types of data were collected
ACQ003 ESP: Expanding Spread Profile Refraction Lines 498-505, 516-521, 530, 531
(ESP Lines 01-16). See cruise report for details
The line numbers assigned at sea were incorrect. Add 4 to the line number
in the cruise report to get the archived line number.
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