Marine Geoscience Data System

Seismic Reflection/Refraction Data at the Academic Seismic Portal

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Expeditions / Compilations

EW9705

Maurice Ewing

Processed

Raw

Acquisition Information

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Seismic:Navigation:ShotTime

Data DOI: 10.1594/IEDA/321857

Seismic Shot Point Navigation Data from the Galicia Bank and Iberia Abyssal Plain acquired during the R/V Maurice Ewing expedition EW9705 (1997)

Platform Info

Array:Maurice Ewing

LDEO

Device Info

Seismic:MCS

Events

Line Log

Locale

AtlanticOcean:North

Ocean

File Format

ASCII:TSN

Quality

Details

This dataset, Seismic Shot Point Navigation data, provides the primary seismic navigation source for this cruise and should be used for seismic data processing.

Sawyer, Dale

LDEO

Seismic:Reflection:MCS

Data DOI: 10.1594/IEDA/305537

Multi-Channel Seismic Shot Data from the Iberia Abyssal Plain and Galicia Bank acquired during the R/V Maurice Ewing expedition EW9705 (1997)

Platform Info

Array:Maurice Ewing

LDEO

Device Info

Seismic:MCS

LDEO

Events

Line Log

Locale

AtlanticOcean:North

Ocean

File Format

SEGY

Quality

Sawyer, Dale

LDEO

Event Logs

Line (EW9705)

Device Info

Related Devices

Sawyer, Dale

LDEO

Line (EW9705)

Device Info

Seismic:MCS

Platform: Maurice Ewing (Array)

Seismic:OBS

Platform: Maurice Ewing (Array)

Sawyer, Dale

LDEO

Station:Bottom:Deployed (EW9705)

Device Info

Seismic:OBS

Platform: Maurice Ewing (Array)

Sawyer, Dale

LDEO

Seismic Acquisition Parameters

Download As Text

EW9705_ACQ001 (Lines: Sequences 1-8)

Source Information

AirGun (BOLT:1500C)

Source Number: 20

Volume (cu in): 8385

Pressure (psi): 2000

Depth (m): 8.5

Distance to Near Channel (m): 37.9

Distance to Antenna (m): 87.4

Number of Arrays: 1

Receiver Information

Hydrophone:Streamer

Number of Cables: 1

Channels Per Cable: 168

Group Spacing (m): 25

Cable Length (m): 4000

Near Channel Number: 160

Nav System

DGPS Magnovox 4200D

WGS84

Acquisition System

Digital

Name: DMS2000

Sample Interval (msec): 2

Details

For Sequences 1 and 7, the Shot Interval was 60s and the Record Length was 25s

For Sequences 2,5,6,8, the Shot Interval was 20s and the Record Length was 16s

For Sequences 3 and 4, the Shot Interval was 40s and the Record Length was 25s

168 channels were originally recorded, 160 channels were MCS, 168 were archived.

EW9705_ACQ002 (Lines: Sequences 9,15-25)

Source Information

AirGun (BOLT:1500C)

Source Number: 20

Volume (cu in): 8385

Pressure (psi): 2000

Depth (m): 8.5

Distance to Near Channel (m): 37.9

Distance to Antenna (m): 87.4

Number of Arrays: 1

Receiver Information

Hydrophone:Streamer

Number of Cables: 1

Channels Per Cable: 172

Group Spacing (m): 25

Cable Length (m): 4100

Near Channel Number: 164

Nav System

DGPS Magnavox 4200D

WGS84

Acquisition System

Digital

Name: DMS2000

Sample Interval (msec): 2

Details

For Sequence 19 (shots 100-441), the Shot Interval was 60s and the Record Length was 25s

For Sequences 17,18,20,21 (shots 101-825),22-25, the Shot Interval was 20s and the Record Length was 16s

For Sequences 9,15,16,19 (shots 442-1269), the Shot Interval was 40s and the Record Length was 25s

For Sequence 21 (shots 826-2616), the Shot Interval was 60s and the Record Length was 16s

172 channels were originally recorded, 164 channels were MCS, 172 were archived.

EW9705_ACQ003 (Lines: Sequences 10-14)

Source Information

AirGun (BOLT:1500C)

Source Number: 20

Volume (cu in): 8385

Pressure (psi): 2000

Depth (m): 8.5

Distance to Near Channel (m): 63.9

Distance to Antenna (m): 87.4

Number of Arrays: 1

Receiver Information

Hydrophone:Streamer

Number of Cables: 1

Channels Per Cable: 40

Group Spacing (m): 25

Cable Length (m): 1000

Near Channel Number: 40

Nav System

DGPS Magnovox 4200D

WGS84

Acquisition System

Digital

Name: DMS2000

Sample Interval (msec): 2

Details

For Sequences 10,12,14, the Shot Interval was 40s and the Record Length was 25s

For Sequences 11 and 13, the Shot Interval was 20s and the Record Length was 16s

172 channels were originally recorded, 40 channels were MCS, 172 were archived.

edu.utexas.ig:ew9705_acq001 (Lines: )

Source Information

AirGun

Receiver Information

NotApplicable

Used Active Tail Buoy: false

Used Compass Birds: false

Nav System

GPS

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: GPS

Survey Datum: WGS84

Source to Near Channel (m): null

Antenna to Source (m): 88.7

Number of Channels Recorded: 160

Channel Length (m): 25

Cable Receiver Depth (m): null

Source Volume (cubicInches): 8400

Source Pressure (bars): null

Source Number: 20

Source Depth (m): 8.5 meters

Shot Control: time

Shot Interval (s or m): 40: corresponding to a shot spacing of 100 m.

Compass Birds: no

Tail Buoy Positioning: no

Recording Delay: no

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