Date (Creation)

2021-07-02

Date (Revision)

2021-07-02

Date (Publication)

2021-07-02

Date (released)

2021-07-02

Edition

1.0

Unique resource identifier

https://doi.org/10.5285/bdfeb69c-df5c-461d-b7a8-583f9daab685

Codespace

doi

Unique resource identifier

GB/NERC/BAS/PDC/01517

Codespace

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

Unique resource identifier

NE/J006548/1

Codespace

award

Other citation details

Please cite this item as: Larter, R., Hogan, K., Hillenbrand, C., & Gowland, E. (2021). Topographic Parametric Sonar (TOPAS) acoustic sub-bottom profiler data acquired on RRS James Clark Ross JR298 cruise in 2015 (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/bdfeb69c-df5c-461d-b7a8-583f9daab685

Credit

No credit.

Status

Completed

Point of contact

Organisation name	Individual name	Electronic mail address	Role
British Antarctic Survey	Larter, Robert		Author
British Antarctic Survey	Hogan, Kelly		Author
British Antarctic Survey	Hillenbrand, Claus-Dieter		Author
British Antarctic Survey	Gowland, Elanor		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 > Solid Earth > Seismology > Seismic Profile
• EARTH SCIENCE > Oceans > Marine Geophysics

Theme

• Antarctica

• Sub-bottom profile

• TOPAS

• continental rise

• sediment

Place

• Antarctic Peninsula Antarctica

• Bellingshausen Sea

GEMET - INSPIRE themes, version 1.0

• Geology
• Oceanographic geographical features

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

Please cite this dataset as follows:

Larter, R., Hogan, K., Hillenbrand, C.-D., & Gowland, E. (2021). Topographic Parametric Sonar (TOPAS) acoustic sub-bottom profiler data acquired on RRS James Clark Ross JR298 cruise in 2015 (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/BDFEB69C-DF5C-461D-B7A8-583F9DAAB685

Use constraints

Other restrictions

Other constraints

None

Unique resource identifier

url

Codespace

url

Association Type

Cross reference

Unique resource identifier

doi

Codespace

doi

Association Type

Cross reference

Unique resource identifier

url

Codespace

url

Association Type

Cross reference

Spatial representation type

Text, table

Language

English

Character set

UTF8

Topic category

• Elevation
• Geoscientific information

Begin date

2015-02-01

End date

2015-03-01

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:

These data were collected using a Kongsberg Simrad TOPAS PS018 acoustic sub-bottom profiler. The TOPAS system operated by transmitting a chirp pulse with a frequency band of 1.5-5kHz and length of 10 ms. The receiver had a sample rate of 20 kHz with a trace length of 400 ms, and the gain (in dB) was controlled by the sonar watchkeeper with a range of 2-15 dB and a high-pass filter of 1-2 kHz .

Logging of sub-bottom profiler data began at 1514 UTC on Julian day 032, and the system was operated near-continuously during the cruise until 1208 UTC on Julian day 058 when the JCR was approaching Rothera.TOPAS was re-started at 1014 UTC on Julian day 059 and was run until a location in the Drake Passage, 200 nautical miles from the coast at the edge of Argentina's exclusive economic zone. Pinging and logging of TOPAS sub-bottom profiles was stopped for the final time at 1756 UTC on Julian day 060.

Additional settings information can be found in the cruise report: https://www.bodc.ac.uk/resources/inventories/cruise_inventory/reports/jr298.pdf

Data collection:

Data were collected using a Kongsberg Simrad TOPAS PS018 sub-bottom profiler

Data quality:

A swept-frequency ("chirp") transmission pulse was used, which required the return signals to be cross-correlated with the source signature (matched filter) throughout the cruise to extract signals with a simple effective waveform, which also has the benefit of reducing random noise (see more information in the cruise report: https://www.bodc.ac.uk/resources/inventories/cruise_inventory/reports/jr298.pdf)

Metadata

File identifier

bdfeb69c-df5c-461d-b7a8-583f9daab685 XML

Metadata language

English

Character set

UTF8

Hierarchy level

Dataset

Hierarchy level name

dataset

Date stamp

2021-07-02

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