Marine Geoscience Data System

Seismic Reflection/Refraction Data at the Academic Seismic Portal

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Expeditions / Compilations

EW9209

Maurice Ewing

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Acquisition Information

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Seismic:Ancillary

Raw Single-Channel Seismic Data from the Atlantic Ocean acquired during the Maurice Ewing expedition EW9209 (1992)

Platform Info

Array:Maurice Ewing

LDEO

Device Info

Seismic:SCS

LDEO

Events

Line Log

Locale

AtlanticOcean

Ocean

File Format

ASCII

Quality

Curry, William

WHOI

Seismic:Reflection:SCS

Data DOI: 10.1594/IEDA/305332

Single-Channel Seismic Shot Data from the Ceara Rise, Equatorial Atlantic Ocean acquired during R/V Maurice Ewing expedition EW9209 (1992)

Platform Info

Array:Maurice Ewing

LDEO

Device Info

Seismic:SCS

LDEO

Events

Line Log

Locale

AtlanticOcean

Ocean

File Format

SEGY

Quality

Curry, William

WHOI

Data Set References

Event Logs

Line (EW9209)

Device Info

Related Devices

Curry, William

WHOI

Line (EW9209)

Device Info

Seismic:SCS

Platform: Maurice Ewing (Array)

Curry, William

WHOI

Station:Surface (EW9209)

Device Info

Seismic:SCS

LDEO

Platform: Maurice Ewing (Array)

Seismic:Sonobuoy

Platform: Maurice Ewing (Array)

Curry, William

WHOI

Seismic Acquisition Parameters

Download As Text

EW9209_ACQ001 (Lines: All lines)

Source Information

AirGun

Pressure (psi): 2000

Depth (m): 7

Distance to Near Channel (m): 150

Number of Arrays: 1

Receiver Information

Hydrophone:Streamer

Number of Cables: 1

Channels Per Cable: 8

Cable Length (m): 106

Near Channel Number: 4

Nav System

GPS

WGS84

Acquisition System

Digital

Name: DSS240

Details

Source to Antenna Distance is unknown

Source volume: 1350 cu in for 6 airguns

Source volume: likely 210 cu in for GI gun

Source to Channel Distance: ch 4 is 150m, ch 3 is 169m, ch 2 is 206m, ch 1 is 256m

Sonobuoys were recorded on channels 5-8

Cable Depth was 50-60 feet

Shot Interval was 10 secs lines 1-19, 21-25, 30-31

Shot Interval was 17 secs for line 20

Shot Interval was 15 secs lines 26-28, 32-36

Shot Interval was 7 secs lines 29

Shot Interval was 12 secs lines 37 and 38

Sample Interval was 2000 microseconds for lines 1-19, 21-25, 29-31

Sample Interval was 4000 microseconds for lines 20, 26-28, 32-35, 36-38

Record Length was 7 seconds for lines 1-7

Record Length was 8 seconds lines 8-19, 21-25, 30-31, 36

Record Length was 15 seconds for line 20

Record Length was 12 seconds lines 26-28, 32-35

Record Length was 5 seconds for line 29

Record Length was 10 seconds lines 36-38

Sample Interval was 2000 microseconds for lines 1-19, 21-25, 29-31

Sample Interval was 4000 microseconds for lines 20, 26-28, 32-35, 36-38

edu.utexas.ig:ew9209_acq001 (Lines: )

Source Information

AirGun

Receiver Information

Hydrophone:Streamer

Used Active Tail Buoy: false

Used Compass Birds: false

Nav System

GPS

WGS84

Acquisition System

Digital

Name: DSS 240

Details

Receiver Type: Hydrophone_Streamer

Source Type: SeismicSource_Gun_Air

Acquisition System Name: DSS 240

Acquisition System Type: digital

Seismic Nav System: GPS

Survey Datum: WGS84

Source to Near Channel (m): 150: channel 4; 169: channel 3; 206: channel 2, 256: channel 1

Antenna to Source (m): unknown

Number of Channels Recorded: 8 (Sonobuoys recorded on channels 5-8)

Channel Length (m): null

Cable Receiver Depth (m): 50 to 60

Source Volume (cubicInches): 1350: for 6 airguns; 210: for GI gun ?

Source Pressure (bars): 138

Source Number: 6 (GI gun used for lines 21-25)

Source Depth (m): 6.1

Shot Control: time

Shot Interval (s or m): 10: lines 1-19, 21-25, 30-31;<br>17: line 20;<br>15: lines 26-28, 32-36;<br>7: line 29;<br>12: lines 37,38

Compass Birds: no

Tail Buoy Positioning: no

Recording Delay: no

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