MGL0807 Backscatter:Acoustic, Bathymetry:Swath, Sidescan

Multibeam sonar bathymetry and backscatter data from the Central America subduction zone collected in 2008 on Langseth cruise MGL0807 (investigators Holbrook, van Avendonk, Cheadle, Kelemen, Lizarralde)

This multibeam swath bathymetry data set was collected with a Kongsberg EM120 sonar system during Langseth cruise MGL0807. The data files are in MBSystem format and were acquired as part of a project called Seismic measurements of magma flux, arc composition, and lower-plate serpentinization in the Central American subduction factory. Funding was provided by NSF grants OCE04-05556, OCE04-05654, OCE04-05608, OCE04-05572, OCE05-20378, OCE06-25178.

Holbrook, W. Steven

Investigator

University of Wyoming

Device Info

Sonar:Multibeam

Kongsberg:EM120

Platform

Marcus G. Langseth

LDEO

Awards

OCE04-05654

Quality

Data have not been processed or modified since acquisition (e.g. Realtime navigation or sonar data, raw images etc.).

Report Incorrect Information

Data Files

Documents

ISO/XML Metadata

Seismic Acquisition Parameters

Download as Text: MGL0807

MGL0807_ACQ001 (Lines: 2, 3, 5, 7, 8, 9, 11, 13)

Source Information

AirGun (BOLT:1500LL)

Source Number: 36

Volume (cu in): 6600

Pressure (psi): 2000

Depth (m): 9.6

Distance to Near Channel (m): 141.6

Distance to Antenna (m): 98.3

Number of Arrays: 1

Receiver Information

Hydrophone:Streamer

Number of Cables: 1

Channels Per Cable: 636

Channels Recorded: 636

Group Spacing (m): 12.5

Cable Length (m): 7950

Cable Depth (m): 9

Near Channel Number: 636

Used Active Tail Buoy: true

Used Compass Birds: true

Nav System

C-Nav Primary

WGS84

Acquisition System

Digital

Name: Syntron Syntrak 960

Sample Interval (msec): 2

Details

Shot Spacing: 37.5m for sequence lines 02,07

50m for sequence line 02,03,05,08,09

100m for sequence line 11,13

Record Length: 10 secs for sequence line 07

14 secs for sequence line 08,09

15 secs for sequence line 02 (from shot 1276),03

16 secs for sequence line 02 (until shot 1270),05

20 secs for sequence line 11,13

MGL0807_ACQ002 (Lines: 14, 16, 18, 20, 22, 24, 26, 27, 29, 31, 32, 34-38, 40, 42-49)

Source Information

AirGun (BOLT:1500LL)

Source Number: 36

Volume (cu in): 6600

Pressure (psi): 2000

Depth (m): 9.6

Distance to Near Channel (m): 139.3

Distance to Antenna (m): 100.6

Number of Arrays: 1

Receiver Information

Hydrophone:Streamer

Number of Cables: 1

Channels Per Cable: 636

Group Spacing (m): 12.5

Cable Length (m): 7950

Cable Depth (m): 6

Near Channel Number: 636

Used Active Tail Buoy: true

Used Compass Birds: true

Nav System

C-Nav Primary

WGS84

Acquisition System

Digital

Name: Syntron Syntrak 960

Details

Shot Spacing: 25m for sequence line 14

37.5m for sequence lines 34-38,40

50m for sequence lines 29,31,32,42-49

100m for sequence line 20

150m for sequence lines 22,24,26,27

Sample Interval: 500 microsecs for sequence lines 34-38,40

2000 microsecs for sequence lines 16,18,20,22,24,26,27,29,31,32,42-49

Record Length: 8 secs for sequence line 14

10 secs for sequence lines 34-38,40

15 secs for sequence line 49

16 secs for sequence lines 22,24,26,27,29,31,32,42-48

20 secs for sequence lines 16,18,20

240 channels recorded for sequence lines 34-38,40

480 channels recorded for sequence line 14

636 channels recorded for sequence lines 16,18,20,22,24,26,27,29,31,32,42-49

MGL0807_ACQ003 (Lines: 51-56, 58, 59, 71-73,75-81)

Source Information

AirGun (BOLT:1500LL)

Source Number: 36

Volume (cu in): 6600

Pressure (psi): 2000

Depth (m): 9.6

Distance to Near Channel (m): 139.3

Distance to Antenna (m): 150.6

Number of Arrays: 1

Receiver Information

Hydrophone:Streamer

Number of Cables: 1

Channels Per Cable: 636

Group Spacing (m): 12.5

Cable Length (m): 7950

Cable Depth (m): 6

Near Channel Number: 636

Used Active Tail Buoy: true

Used Compass Birds: true

Nav System

C-Nav Primary

WGS84

Acquisition System

Digital

Name: Syntron Syntrak 960

Details

Shot Spacing: 25m for sequence lines 53-56,58,59,77-79

50m for sequence lines 52,64,73,76,80,81

150m for sequence lines 67,68,70,71,75

200m for sequence lines 61,65,69

250m for sequence lines 60,62,63,66

500m for sequence line 51

Sample Interval: 500 microsecs for sequence lines 77-79

1000 microsecs for sequence lines 52-59

2000 microsecs for sequence lines 51, 60-71,73-75,76,80,81

240 channels recorded for sequence lines 77-79

480 channels recorded for sequence lines 52-59

636 channels recorded for sequence lines 51,60-71,73-75,76,80,81

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