MGL0812 Backscatter:Acoustic, Bathymetry:Swath, Sidescan

Raw multibeam bathymetry and acoustic backscatter data collected in 2008 at the East Pacific Rise 9-50N study site during Langseth cruise MGL0812 (investigator Suzanne Carbotte)

The data set was acquired with a ship-based Simrad EM120 multibeam sonar system. The files are in MBSystem format and were generated as part of a project called 3-D/4-D Seismic Reflection Imaging of the Magmatic-Hydrothermal System at the East Pacific Rise Ridge 2000 Integrated Study Site at 9 50' N. Funding was provided with NSF award OCE03-27872.

Mutter, John

Investigator

LDEO

Carbotte, Suzanne

Investigator

LDEO

Device Info

Sonar:Multibeam

Kongsberg:EM120

Platform

Marcus G. Langseth

LDEO

Awards

OCE03-27872

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: MGL0812

MGL0812_ACQ001 (Lines: )

Source Information

AirGun (BOLT:1500LL)

Source Number: 18

Volume (cu in): 3300

Pressure (psi): 2000

Depth (m): 7.5

Shot Interval (m): 37.5

Distance to Near Channel (m): 200

Distance to Antenna (m): 299.57

Number of Arrays: 2

Source Array Separation (m): 75

Receiver Information

Hydrophone:Streamer (SERCEL:Sentry)

Number of Cables: 4

Channels Per Cable: 468

Channels Recorded: 1872

Group Spacing (m): 12.5

Cable Spacing (m): 150

Cable Length (m): 5850

Cable Depth (m): 10

Used Active Tail Buoy: true

Used Compass Birds: true

Nav System

Cnav-primary

WGS84

Acquisition System

Digital

Name: Syntron Syntrak 960

Sample Interval (msec): 2

Record Length (sec): 10

Details

18 guns each source array

Near Channel Number for each streamer is 468, 936, 1404, 1872

Record Length for Sequence 1 (AXIS1) is 8 seconds. The rest of the lines were recorded for 10 seconds. Cable Depth is 7.5m for Sequence 1, 2, 3, 4 (AXIS1, AXIS2, AXIS3, AXIS2R1), 15m for Sequence 5 (Transit1). Cable Depth was 10m for the rest of the lines

Source to Near Channel Distance is given as an approximation, use P1/P2 files for greater accuracy.

org.marine-geo:MGL0812_ACQ001 (Lines: )

Source Information

AirGun

Receiver Information

Hydrophone:Streamer

Used Active Tail Buoy: true

Used Compass Birds: true

Nav System

Cnav-primary

WGS84

Acquisition System

Digital

Name: Syntron Syntrak 960

Details

Receiver Type: Hydrophone_Streamer

Source Type: SeismicSource_Gun_Air

Acquisition System Name: Syntron Syntrak 960

Acquisition System Type: digital

Seismic Nav System: Cnav-primary

Survey Datum: WGS84

Source to Near Channel (m): null

Antenna to Source (m): 299.57

Number of Channels Recorded: 1872

Channel Length (m): 12.5

Cable Receiver Depth (m): 7.5: sequence 1, 2, 3, 4 (AXIS1, AXIS2, AXIS3, AXIS2R1); 15: sequence 5 (Transit1); 10: rest of lines

Source Volume (cubicInches): 3300

Source Pressure (bars): 138

Source Number: 36

Source Depth (m): 7.5

Shot Control: distance

Shot Interval (s or m): 37.5

Compass Birds: yes

Tail Buoy Positioning: yes

Recording Delay: no

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