EW9502 - Marine Geoscience Data System

Sensor Data

Sort by:

Bathymetry:Singlebeam, Gravity:Field

Device Info

Gravimeter, Sonar:Multibeam

Maurice Ewing

Repository

MGDS

Format

MGD77

McIntosh, Kirk

UTIG

Bathymetry:Swath

(Swath)

Device Info

Sonar:Multibeam

Maurice Ewing

Repository

NOAA:NCEI

Repository

MGDS

Format

MBSystem

McIntosh, Kirk

UTIG

Navigation:Primary

Device Info

Navigation

Maurice Ewing

Repository

MGDS

Format

MGDS:Nav, SHP

McIntosh, Kirk

UTIG

Seismic Reflection/Refraction

(Image Seismic, Segy)

Device Info

Seismic:OBS

Array:Maurice Ewing

Repository

MGDS

Format

PDF, SEGY

Christeson, Gail

McIntosh, Kirk

UTIG

Related References

Seismic Reflection/Refraction

(Image Seismic, Segy)

Device Info

Seismic:SCS

Array:Maurice Ewing

Repository

MGDS

Format

ASCII, ASCII:TSN, PDF, SEGY

McIntosh, Kirk

UTIG

Shipley, Thomas

UTIG

Stoffa, Paul

Nakamura, Yosio

Related References

Seismic:Navigation

Device Info

Seismic:OBS

Array:Maurice Ewing

Repository

MGDS

Format

ASCII

Christeson, Gail

Related References

Event Logs

Line

Device Info

Related Devices

McIntosh, Kirk

UTIG

Line

Device Info

Seismic:OBS

Platform: Maurice Ewing (Array)

Seismic:SCS

Platform: Maurice Ewing (Array)

McIntosh, Kirk

UTIG

Station:Bottom:Deployed

Device Info

Seismic:OBS

Platform: Maurice Ewing (Array)

McIntosh, Kirk

UTIG

Seismic Acquisition Parameters

Download As Text

EW9502_ACQ001 (Lines: All EXP1, EXP3 lines: 103,100,101,102,104,105,303,305,301,302)

Source Information

AirGun (BOLT:1500C)

Source Number: 20

Volume (cu in): 8430

Pressure (psi): 2000

Distance to Near Channel (m): 137

Distance to Antenna (m): 87.4

Number of Arrays: 1

Receiver Information

Hydrophone:Streamer

Number of Cables: 1

Channels Per Cable: 2

Group Spacing (m): 50

Cable Length (m): 100

Cable Depth (m): 10

Nav System

ship: DGPS Magnavox 4200D, scientists: RAYCAL Multifix DGPS Service provided DGPS corrections via Inmarsat to 3 separate receivers

WGS84

Acquisition System

Digital

Name: DMS2000 with French AMG Analog streamer

Sample Interval (msec): 2

Details

Source Depth is unknown

Near Channel Number is unknown

Shot Interval was varied to give 50m for lines 103,101

Shot Interval was varied to give 75m for line 100

Shot Interval was varied to give 125m for lines 102,104,105

Shot Interval was varied to give 50m for all EXP3 lines

Record Length was 20s for EXP1 shots 5-630

Record Length was 16s for EXP1 shots 637-5318

Record Length was 10s for EXP3

Number of Channels: 8 channels were recorded, channels 1-2 contained MCS data, channels 3-8 believed to be empty

EW9502_ACQ002 (Lines: EXP2 lines from 201 through 235R: 201,211,202,213,205,215,207,217,209,219,229,221,231,223,233,225,235,227,237,228,236,226,234,224,232,222,230,220,210,218,208,216,206,214,204,212,203,220R,226R,235R)

Source Information

AirGun (BOLT:1500C)

Source Number: 16

Volume (cu in): 5895

Pressure (psi): 2000

Shot Interval (sec): 19

Distance to Near Channel (m): 137

Distance to Antenna (m): 87.4

Number of Arrays: 1

Receiver Information

Hydrophone:Streamer

Number of Cables: 1

Group Spacing (m): 50

Cable Length (m): 100

Cable Depth (m): 10

Nav System

ship: DGPS Magnavox 4200D, scientists: RAYCAL Multifix DGPS Service provided DGPS corrections via Inmarsat to 3 separate receivers

WGS84

Acquisition System

Digital

Name: DMS2000 with French AMG Analog streamer

Sample Interval (msec): 2

Record Length (sec): 10

Details

Source Depth is unknown

Near Channel Number is unknown

Number of Channels: 8 channels were recorded, channels 1-2 contained MCS data, channels 3-8 believed to be empty

EW9502_ACQ003 (Lines: EXP2 lines 239,238,242,241,240)

Source Information

AirGun (BOLT:1500C)

Source Number: 20

Volume (cu in): 8355

Pressure (psi): 2000

Shot Interval (sec): 19

Distance to Near Channel (m): 137

Distance to Antenna (m): 87.4

Number of Arrays: 1

Receiver Information

Hydrophone:Streamer

Number of Cables: 1

Group Spacing (m): 50

Cable Length (m): 100

Cable Depth (m): 10

Nav System

ship: DGPS Magnavox 4200D, scientists: RAYCAL Multifix DGPS Service provided DGPS corrections via Inmarsat to 3 separate receivers

WGS84

Acquisition System

Digital

Name: DMS2000 with French AMG Analog streamer

Sample Interval (msec): 2

Record Length (sec): 10

Details

Source Depth is unknown

Near Channel Number is unknown

Number of Channels: 8 channels were recorded, channels 1-2 contained MCS data, channels 3-8 believed to be empty

Use of compass birds and active tailbuoy is unknown

edu.utexas.ig:ew9502_acq001 (Lines: )

Source Information

AirGun

Receiver Information

NotApplicable

Used Active Tail Buoy: false

Used Compass Birds: false

Nav System

Differential GPS satellite navigation

WGS84

Acquisition System

Digital

Name: DSS 240

Details

Receiver Type: Hydrophone_Streamer; Seismometer_OceanBottom

Source Type: SeismicSource_Gun_Air

Acquisition System Name: DSS 240

Acquisition System Type: digital

Seismic Nav System: Differential GPS satellite navigation

Survey Datum: WGS84

Source to Near Channel (m): null

Antenna to Source (m): 87.4

Number of Channels Recorded: 2

Channel Length (m): null

Cable Receiver Depth (m): null

Source Volume (cubicInches): 5895-8420

Source Pressure (bars): 138

Source Number: 16-20

Source Depth (m): 10-Jun

Shot Control: null

Shot Interval (s or m): null

Compass Birds: no

Tail Buoy Positioning: no

Recording Delay: no

References

Christeson et al., 1996 Effect of shot interval on ocean bottom seismograph and hydrophone data Geophysical Research Letters 23. doi: 10.1029/96GL03572

Christeson et al., 1999 Structure of the Costa Rica convergent margin, offshore Nicoya Peninsula J. Geophys. Res. 104. doi: 10.1029/1999JB900251

Christeson et al., 2000 Seismic attenuation in the Costa Rica margin wedge: Amplitude modeling of ocean bottom hydrophone data Earth and Planetary Science Letters 179. doi: 10.1016/S0012-821X(00)00118-7

McIntosh et al., 2000 Large aperture seismic imaging of a convergent margin: Techniques and results from the Costa Rica seismogenic zone Mar Geophys Res 21.

Stavenhagen et al., 1998 Seismic wide-angle investigations in Costa Rica: A crustal velocity model from the Pacific to the Caribbean coast Zent. Geol. Paleont H.3-6.

Scientific Personnel

Christeson, Gail

Investigator
(not in field)

UTIG

McIntosh, Kirk

Scientist:Chief

UTIG

Nakamura, Yosio

Scientist

UTIG

Shipley, Thomas

Scientist:Co-Chief

UTIG

Stoffa, Paul

Scientist

UTIG

Support Personnel

Robinson, William

Technician:Data

LDEO

Instruments

Gravimeter

Device Info

BGM-3

BellAerospace

Navigation

Device Info

NotProvided

Sonar:Multibeam

Device Info

Hydrosweep DS

Atlas

Seismic:OBS

Device Info

NotProvided

Platform Info

Maurice Ewing

Array

Seismic:SCS

Device Info

NotProvided

LDEO

Platform Info

Maurice Ewing

Array

Seismic:SCS

Device Info

NotProvided

Platform Info

Maurice Ewing

Array