EW9101 Navigation:Primary

Processed ship-based Navigation Data acquired during the Maurice Ewing expedition EW9101 (1991)

This data set was acquired with a ship-based Navigation system during Maurice Ewing expedition EW9101 conducted in 1991 (Chief Scientist: Dr. James Austin). These data files are of Text File (ASCII) format and include Navigation data and were processed after data collection. Data were acquired as part of the project(s): The Bransfield Strait-South Shetland Islands/Trench: Structural and Stratigraphic Evolution of a Linked(?) Back-arc/Fore-arc System and The Pacific Margin of the Antarctic Pennisula: A Marine Geophysical Study of the Tectonic Evolution of Andean-Type Orogens, and funding was provided by NSF grant(s): DPP89-17332 and OCE94-18135.

Austin, James

Investigator

LDEO

Device Info

Navigation

Platform

Maurice Ewing

LDEO

Awards

OCE94-18135

Data DOI

10.1594/IEDA/311420

Quality

A level of processing has been undertaken, ensuring quality control (e.g. ping edited sonar data, edited navigation data).

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Data Files

Documents

Data Citation Information

Related Data Sets

ISO/XML Metadata

Seismic Acquisition Parameters

Download as Text: EW9101

EW9101_ACQ001 (Lines: Sequences 1-21,33-35,37-39,41-46)

Source Information

AirGun (BOLT:1500C)

Source Number: 20

Volume (cu in): 8385

Pressure (psi): 2000

Depth (m): 9

Distance to Near Channel (m): 263

Distance to Antenna (m): 95

Number of Arrays: 1

Receiver Information

Hydrophone:Streamer

Number of Cables: 1

Channels Per Cable: 120

Channels Recorded: 120

Group Spacing (m): 25

Cable Length (m): 3000

Cable Depth (m): 8

Near Channel Number: 120

Used Active Tail Buoy: false

Used Compass Birds: true

Nav System

GPS

WGS84

Acquisition System

Digital

Name: DSS240

Sample Interval (msec): 4

Record Length (sec): 16

Details

The AP lines are Seq 01-32, Lines 1035-1066: 144 channels originally recorded, 120 channels MCS, 144 archived

The SAP lines are Seq 33-46, Lines 1067-1080: 144 channels originally recorded, 120 channels MCS, 120 archived

Shot Interval was 20 seconds for ~50 meters.

EW9101_ACQ002 (Lines: Sequences 22-32,36,40)

Source Information

AirGun (BOLT:1500C)

Source Number: 20

Volume (cu in): 8385

Pressure (psi): 2000

Depth (m): 9

Distance to Near Channel (m): 263

Distance to Antenna (m): 95

Number of Arrays: 1

Receiver Information

Hydrophone:Streamer

Number of Cables: 1

Channels Per Cable: 120

Channels Recorded: 120

Group Spacing (m): 25

Cable Length (m): 3000

Cable Depth (m): 8

Near Channel Number: 120

Used Active Tail Buoy: false

Used Compass Birds: true

Nav System

GPS

WGS84

Acquisition System

Digital

Name: DSS240

Sample Interval (msec): 4

Record Length (sec): 12

Details

The AP lines are Seq 01-32, Lines 1035-1066: 144 channels originally recorded, 120 channels MCS, 144 archived

The SAP lines are Seq 33-46, Lines 1067-1080: 144 channels originally recorded, 120 channels MCS, 120 archived

Shot Interval was 20 seconds for ~50 meters.

edu.utexas.ig:ew9101_acq001 (Lines: )

Source Information

AirGun

Receiver Information

Hydrophone:Streamer

Used Active Tail Buoy: false

Used Compass Birds: false

Nav System

GPS satellite navigation

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 satellite navigation

Survey Datum: WGS84

Source to Near Channel (m): 263

Antenna to Source (m): 95

Number of Channels Recorded: 120

Channel Length (m): 25

Cable Receiver Depth (m): 8

Source Volume (cubicInches): 8385

Source Pressure (bars): 138

Source Number: 20

Source Depth (m): 9

Shot Control: time

Shot Interval (s or m): 20: seconds interval for ~ 50 meters

Compass Birds: no

Tail Buoy Positioning: no

Recording Delay: no

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