Date (Creation)

2018-09-20

Date (Revision)

2018-09-20

Date (Publication)

2018-09-20

Date (released)

2018-09-20

Edition

1.0

Unique resource identifier

https://doi.org/10.5285/c563569e-0875-404b-acb2-cd5f9e5c4706

Codespace

doi

Unique resource identifier

GB/NERC/BAS/PDC/01099

Codespace

https://data.bas.ac.uk/

Other citation details

Please cite this item as: Brisbourne, A., & Smith, A. (2018). Multi-azimuth long-offset seismic gathers from Korff Ice Rise, West Antarctica, 2015 (Version 1.0) [Data set]. Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/c563569e-0875-404b-acb2-cd5f9e5c4706

Credit

No credit.

Status

Completed

Point of contact

Organisation name	Individual name	Electronic mail address	Role
British Antarctic Survey, Natural Environment Research Council, UK Research & Innovation	Brisbourne, Alex		Author
British Antarctic Survey, Natural Environment Research Council, UK Research & Innovation	Smith, Andy		Author
NERC EDS UK Polar Data Centre		PDCServiceDesk@bas.ac.uk	Point of contact

Maintenance and update frequency

As needed

Maintenance note

Completed

Global Change Master Directory (GCMD) Science Keywords

• EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets > Glacier Facies
• EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets > Ice Sheets
• EARTH SCIENCE > Hydrosphere > Glaciers/Ice Sheets > Glacier Facies
• EARTH SCIENCE > Hydrosphere > Glaciers/Ice Sheets > Ice Sheets
• EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets
• EARTH SCIENCE > Hydrosphere > Glaciers/Ice Sheets

Theme

• Anisotropy

• Fabric

• Polarimetry

• Seismic

Place

• Korff Ice Rise Antarctica

GEMET - INSPIRE themes, version 1.0

• Elevation
• Hydrography

Access constraints

Other restrictions

Other constraints

no limitations to public access

Access constraints

Other restrictions

Other constraints

no limitations

Use constraints

License

Other constraints

Open Government Licence v3.0

Use constraints

Other restrictions

Other constraints

This data is governed by the NERC Data Policy: https://www.ukri.org/who-we-are/nerc/our-policies-and-standards/nerc-data-policy/

Use constraints

Other restrictions

Other constraints

This data is governed by the NERC data policy and supplied under Open Government Licence v.3

Use constraints

Other restrictions

Other constraints

No restrictions apply.

Unique resource identifier

url

Codespace

url

Association Type

Cross reference

Spatial representation type

Text, table

Language

English

Character set

UTF8

Topic category

• Geoscientific information

Begin date

2015-01-01

End date

2015-01-31

Supplemental Information

It is recommended that careful attention be paid to the contents of any data, and that the author be contacted with any questions regarding appropriate use. If you find any errors or omissions, please report them to polardatacentre@bas.ac.uk.

Title

European Petroleum Survey Group (EPSG) Geodetic Parameter Registry

Date (Publication)

2008-11-12

Cited responsible party

Organisation name	Individual name	Electronic mail address	Role
European Petroleum Survey Group		EPSGadministrator@iogp.org	Publisher

Unique resource identifier

urn:ogc:def:crs:EPSG::3031

Version

6.18.3

Hierarchy level

Dataset

Statement

Methodology:

The three gathers were oriented at 60° to one another to constrain azimuthal variation in seismic properties centred on a single site on the axis of the divide. Each gather used four shot points, each with 48 receivers at 10m intervals. The offset to the first receiver ranged from 30 to 1440m, producing traces out to 1940m offset, or incidence angle at the bed up to 58°. To achieve three-component recordings, the receivers were oriented to measure either vertical, radial or transverse motion. The CMP gather along the divide axis (K01; true bearing 043°) was shot twice: once with all sensors orientated vertically using 150g of high explosive, and once with horizontal sensors alternating radial and transverse orientation, using 600g shots; the latter resulting in an effective 20m receiver interval for the horizontal components. The oblique CMP gathers (K02: 60° east of K01; K03: 60° west of K01) were shot once only, each with 600g shots and alternating vertical, radial and transverse receivers, resulting in an effective 30m receiver interval for all three components. The larger shot is required to generate sufficient S-wave energy at the source. Although an explosive source in a homogeneous isotropic medium will theoretically not generate S-wave energy, the non-uniform nature of the shallow firn results in significant S-wave energy. The acquisition geometry results in a mid-point basal reflection ellipse with a length of 235m.

Data collection:

Instrumentation:

Recorded on 2 x 24 channel Geometrics Geode with 48 x 40Hz Georods; Source: 150-600g high explosive shots at 20 m depth.

Resolution:

The Fresnel zone is less than 80 m (minimum 150 Hz dominant frequency).

1940m maximum offset.

Data quality:

8000Hz sample rate with GPS shot trigger timing; 24 bit recording

Metadata

File identifier

c563569e-0875-404b-acb2-cd5f9e5c4706 XML

Metadata language

English

Character set

UTF8

Hierarchy level

Dataset

Hierarchy level name

dataset

Date stamp

2018-09-20

Metadata standard name

ISO 19115 Geographic Information - Metadata

Metadata standard version

ISO 19115:2003(E)

Metadata author

Organisation name	Individual name	Electronic mail address	Role
NERC EDS UK Polar Data Centre		polardatacentre@bas.ac.uk	Point of contact