GPS and ApRES data relating to the growth of Chasm-1, Brunt Ice Shelf from 2016 to 2023

The dataset consists of GPS data recorded from four sites close to Halley VI Research Station, plus ApRES data across the rift from 2017-2019. Both data types provide information on the width of an active rift propagating through the ice shelf. GPS sites advect with flow of the ice shelf, while ApRES is repositioned each year. The data were collected as part of the Lifetime-of-Halley monitoring programme.

This work was funded by NERC grant NE/X014991/1 (RIFT-TIP) and supported by NERC Antarctic Logistics and Infrastructure.

Date (Creation): 2025-04-03

Date (Revision): 2025-04-03

Date (Publication): 2025-04-03

Date (released): 2025-04-03

Edition: 1.0

Unique resource identifier: https://doi.org/10.5285/3d6fd5ae-e94d-4d0b-a5e9-5779ca84855e

Codespace: doi

Unique resource identifier: GB/NERC/BAS/PDC/02038

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

Unique resource identifier: NE/X014991/1

Codespace: award

Other citation details: Please cite this item as: Marsh, O., & De Rydt, J. (2025). GPS and ApRES data relating to the growth of Chasm-1, Brunt Ice Shelf from 2016 to 2023 (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/3d6fd5ae-e94d-4d0b-a5e9-5779ca84855e

Credit: No credit.

Status: Completed

Point of contact

Organisation name	Individual name	Electronic mail address	Role
British Antarctic Survey	Marsh, Oliver		Author
Northumbria University	De Rydt, Jan		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

Theme

GPS
Halley VI
calving
ice shelf
velocity

Place

Brunt Ice Shelf, Halley VI Research Station Antarctica

GEMET - INSPIRE themes, version 1.0

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: Data supplied under Open Government Licence v3.0

Use constraints: Other restrictions

Other constraints: No restrictions apply.

Unique resource identifier: url

Codespace: url

Association Type: Larger work citation

Unique resource identifier: url

Codespace: url

Association Type: Larger work citation

Unique resource identifier: url

Codespace: url

Association Type: Larger work citation

Unique resource identifier: url

Codespace: url

Association Type: dependency

Unique resource identifier: url

Codespace: url

Association Type: dependency

Unique resource identifier: url

Codespace: url

Association Type: Cross reference

Unique resource identifier: doi

Codespace: doi

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Unique resource identifier: doi

Codespace: doi

Association Type: Cross reference

Unique resource identifier: doi

Codespace: doi

Association Type: Cross reference

Spatial representation type: Text, table

Language: English

Character set: UTF8

Topic category

Inland waters
Oceans

Begin date: 2016-01-01

End date: 2023-02-01

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

Distributor

Distributor contact

Organisation name	Individual name	Electronic mail address	Role
NERC EDS UK Polar Data Centre		PDCServiceDesk@bas.ac.uk	Distributor

Distributor format

Name	Version
text/plain
application/x-hdf
application/netcdf

Units of distribution: bytes

Transfer size: 91268055040

OnLine resource

Protocol	Linkage	Name
WWW:LINK-1.0-http--link	http://ramadda.data.bas.ac.uk/repository/entry/show?entryid=3d6fd5ae-e94d-4d0b-a5e9-5779ca84855e	Get Data

Units of distribution: bytes

Transfer size: 91268055040

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Protocol	Linkage	Name
WWW:LINK-1.0-http--link	http://ramadda.data.bas.ac.uk/repository/entry/show?entryid=3d6fd5ae-e94d-4d0b-a5e9-5779ca84855e	Get Data

Units of distribution: bytes

Transfer size: 91268055040

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Protocol	Linkage	Name
WWW:LINK-1.0-http--link	http://ramadda.data.bas.ac.uk/repository/entry/show?entryid=3d6fd5ae-e94d-4d0b-a5e9-5779ca84855e	Get Data

Hierarchy level: Dataset

Statement: Methodology:

The GPS sites were installed between 2016 and 2017 and recorded for 2 hours 15 minutes each day at 30 second resolution. Data was converted from raw Leica format (*.m00) to standard Rinex v2 format using UNAVCO's teqc.exe program. The ApRES was installed in a horizontal configuration with antennas spaced approximately 15 m apart. A metal reflector was installed on the far side of the crack and the peak in reflection indicates the distance across the crack. The ApRES raw DAT format was converted to ApRES raw netCDF format using the bas-apres software (v0.3.0). Details in Marsh et al., 2024.

Data collection:

Data collected using Leica GS10 and Leica GX1200 GPS and ApRES.

Data quality:

Dual frequency Raw GPS data have been converted into 5 minute Rinex files. ApRES is in netCDF format. The GPS data are mostly available for each day, although with some gaps in austral winter (July/August). The ApRES data has a high signal to noise ratio (~30 dB) after initial set-up (i.e. in February and March). This generally decreases through the winter and the signal disappears around September each year.

Metadata

File identifier: 3d6fd5ae-e94d-4d0b-a5e9-5779ca84855e XML

Metadata language: English

Character set: UTF8

Hierarchy level: Dataset

Hierarchy level name: dataset

Date stamp: 2025-04-03

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

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