Marine Geoscience Data System

Seismic Reflection/Refraction Data at the Academic Seismic Portal

Expeditions / Compilations

MGL1307

Marcus G. Langseth

Raw

Acquisition Information

Raw Data Sets

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Temperature, Velocity:Sound

Raw XBT Expendable Probe Data from the North Atlantic Ocean acquired during the Marcus G. Langseth expedition MGL1307 (2013)

Platform Info

Marcus G. Langseth

LDEO

Device Info

Probe:Expendable:XBT

Sippican:T-5

Events

Station:WaterColumn:Released Log

Locale

AtlanticOcean:North

Ocean

File Format

EDF

Quality

Sawyer, Dale

Rice

Temperature, Velocity:Sound

Data at NOAA:NCEI

Platform Info

Marcus G. Langseth

LDEO

Device Info

Probe:Expendable:XBT

Sippican:MK21

Locale

AtlanticOcean:North

Ocean

File Format

ASCII

Quality

Sawyer, Dale

Rice

Event Logs

Line (MGL1307)

Device Info

Related Devices

Sawyer, Dale

Rice

Line (MGL1307)

Device Info

Seismic:MCS

Platform: Marcus G. Langseth (Array)

Sawyer, Dale

Rice

Station:WaterColumn:Released (MGL1307)

Device Info

Probe:Expendable:XBT

Sippican:T-5

Platform: Marcus G. Langseth

Sawyer, Dale

Rice

Seismic Acquisition Parameters

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MGL1307_ACQ001 (Lines: Sequences shot by Distance: 1-44,46,48,50,52,54,56,58,60,62,64,66,68,69,70,72,74,76,78,79,80,82,83,85,87,88,89,91,93,94,96,97,98,100,101)

Source Information

AirGun (BOLT:1500LL)

Source Number: 18

Volume (cu in): 3300

Pressure (psi): 2000

Depth (m): 9

Distance to Near Channel (m): 210

Distance to Antenna (m): 270

Number of Arrays: 2

Source Array Separation (m): 100

Receiver Information

Hydrophone:Streamer

Group Spacing (m): 12.5

Cable Spacing (m): 200

Cable Length (m): 6000

Used Active Tail Buoy: true

Used Compass Birds: true

Nav System

C-Nav 3050 primary

WGS84

Acquisition System

Digital

Name: Sercel Syntrak 960

Sample Interval (msec): 2

Details

Shot Spacing for Sequence 2 was 75m

Shot Spacing for Sequences 25,31,36,38 was 150m

Shot Spacing for all other sequences with distance shooting was 37.5m

Record Length for Sequences 1-41 was 15360ms

Record Length for Sequences 42-101 was 13824ms

All lines used 4 streamers except Sequence 28 was reduced to 3 streamers at SP 5858 and continued through Sequence 29

Cable Depth was 12m for Sequences 1-3

Cable Depth varied from 12m-15m for Sequence 4

Cable Depth was 15m for Sequences 5-101

Near Channel Numbers were 468,936,1404,1872 for Sequences 1-27,30-68

Near Channel Numbers were 468,936,1404 for Sequences 28 (after SP 5857) and 29

Near Channel Numbers were 368,816,1284,1752 for Sequences 69-101 after an electronics failure in Cable 1

Number of Channels Recorded for Sequences 1-27,30-41,42-68 was 1872

Number of Channels Recorded for Sequences 28 (after SP 5857) and 29 was 1404

Number of Channels Recorded for Sequences 69-101 was 1752 after an electronics failure in Cable 1

MGL1307_ACQ002 (Lines: Sequences shot by Time: 45,47,49,51,53,55,57,59,61,63,65,67,71,73,75,77,81,84,86,90,92,95,99)

Source Information

AirGun (BOLT:1500LL)

Source Number: 18

Volume (cu in): 3300

Pressure (psi): 2000

Depth (m): 9

Distance to Near Channel (m): 210

Distance to Antenna (m): 270

Number of Arrays: 2

Source Array Separation (m): 100

Receiver Information

Hydrophone:Streamer

Number of Cables: 4

Group Spacing (m): 12.5

Cable Spacing (m): 200

Cable Length (m): 6000

Cable Depth (m): 15

Used Active Tail Buoy: true

Used Compass Birds: true

Nav System

C-Nav 3050 primary

WGS84

Acquisition System

Digital

Name: Sercel Syntrak 960

Sample Interval (msec): 2

Record Length (sec): 13.824

Details

Shot Spacing for Sequences 47,61,65,71,77,86 was 30s

Shot Spacing for all other sequences shot by time was 60s

Near Channel Numbers were 468,936,1404,1872 for Sequences 1-27,30-68

Near Channel Numbers were 468,936,1404 for Sequences 28 (after SP 5857) and 29

Near Channel Numbers were 368,816,1284,1752 for Sequences 69-101 after an electronics failure in Cable 1

Number of Channels Recorded for Sequences 1-27,30-41,42-68 was 1872

Number of Channels Recorded for Sequences 28(after SP 5857) and 29 was 1404

Number of Channels Recorded for Sequences 69-101 was 1752 due to an electronics failure in Cable 1

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