b81bff87-3429-4754-b4b5-c6b58198e744 eng utf8 dataset dataset NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom polardatacentre@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information pointOfContact 2022-04-28 ISO 19115 Geographic Information - Metadata ISO 19115:2003(E) European Petroleum Survey Group (EPSG) Geodetic Parameter Registry 2008-11-12 publication European Petroleum Survey Group EPSGadministrator@iogp.org https://www.epsg-registry.org/ EPSG Geodetic Parameter Dataset The EPSG Geodetic Parameter Dataset is a structured dataset of Coordinate Reference Systems and Coordinate Transformations, accessible through this online registry. information publisher urn:ogc:def:crs:EPSG::3031 6.18.3 Phase-sensitive radar (ApRES) time series data from Thwaites eastern ice shelf, 2020 2022-04-28 creation 2022-04-28 revision 2022-04-28 publication 2022-04-28 released 1.0 https://doi.org/10.5285/b81bff87-3429-4754-b4b5-c6b58198e744 doi GB/NERC/BAS/PDC/01641 https://data.bas.ac.uk/ NE/S006656/1 award Please cite this item as: Nicholls, K., & Holland, D. (2022). Phase-sensitive radar (ApRES) time series data from Thwaites eastern ice shelf, 2020 (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/b81bff87-3429-4754-b4b5-c6b58198e744 The dataset comprises ApRES (Autonomous phase-sensitive Radio Echo Sounder) time series from four sites (G1-4) through the grounding zone of the eastern Thwaites ice shelf. The instruments were deployed in early 2020 and recovered in early 2021 as part of the International Thwaites Glacier Collaboration (ITGC) MELT project. The aim was to provide time series of basal melt rates and the vertical strain rate at each site. The ApRES DAT files were converted to netCDF for publication. Each burst in an ApRES file maps straightforwardly to a group in the corresponding netCDF file. This is a lossless, reversible process. The data were acquired under funding from ITGC: NE/S006656/1. No credit. completed Nicholls, Keith British Antarctic Survey Researcher author Holland, David New York University Researcher author NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom PDCServiceDesk@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information pointOfContact asNeeded completed EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets > Glacier Mass Balance/Ice Sheet Mass Balance EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets > Glacier Motion/Ice Sheet Motion EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets > Glacier Thickness/Ice Sheet Thickness EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets > Glacier Topography/Ice Sheet Topography EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets > Glaciers EARTH SCIENCE > Cryosphere > Snow/Ice > Ice Growth/Melt EARTH SCIENCE > Hydrosphere > Glaciers/Ice Sheets > Glacier Mass Balance/Ice Sheet Mass Balance EARTH SCIENCE > Hydrosphere > Glaciers/Ice Sheets > Glacier Motion/Ice Sheet Motion EARTH SCIENCE > Hydrosphere > Glaciers/Ice Sheets > Glacier Thickness/Ice Sheet Thickness EARTH SCIENCE > Hydrosphere > Glaciers/Ice Sheets > Glacier Topography/Ice Sheet Topography EARTH SCIENCE > Hydrosphere > Glaciers/Ice Sheets > Glaciers EARTH SCIENCE > Hydrosphere > Snow/Ice > Ice Growth/Melt EARTH SCIENCE > Spectral/Engineering > Radar theme Global Change Master Directory (GCMD) Science Keywords 2026-01-27 publication 23 Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA) Greenbelt MD United States of America https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information publisher ApRES ITGC Thwaites Glacier basal melt rate ice shelf vertical strain rate theme Grounding zone of the eastern ice shelf of Thwaites Glacier Antarctica place Elevation Meteorological geographical features Hydrography theme GEMET - INSPIRE themes, version 1.0 2021-01-06 revision otherRestrictions no limitations to public access otherRestrictions no limitations license Open Government Licence v3.0 otherRestrictions Data supplied under Open Government Licence v3.0 otherRestrictions No restrictions apply. url url dependency url url largerWorkCitation url url largerWorkCitation doi doi crossReference doi doi crossReference url url crossReference url url crossReference textTable eng utf8 geoscientificInformation oceans -104.8247 -104.7924 -75.21998 -75.19011 2020-01-22 2020-12-28 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. NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom PDCServiceDesk@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information distributor application/x-hdf application/netcdf bytes 26843545600 https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=b81bff87-3429-4754-b4b5-c6b58198e744 WWW:LINK-1.0-http--link Get Data Download data download bytes 26843545600 https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=b81bff87-3429-4754-b4b5-c6b58198e744 WWW:LINK-1.0-http--link Get Data Download data download dataset Methodology: The datasets were collected using standard ApRES methodology with instrument configuration described in data headers. The radar bandwidth was 200 MHz, centred on 300 MHz with a 1-second chirp length at a power of 20 dBm. Bursts of 20 chirps were collected at 2-hourly intervals. The ApRES DAT files were converted to netCDF for publication, using the bas-apres Python package. Data collection: Standard ApRES instruments were used, comprising an RMB2c radar board and a VAB Issue c controller board, with the controller running firmware version 103.1, under the Venom 20180522 issue of the Venom operating system. The ApRES DAT files were converted to netCDF for publication, using the bas-apres version 0.1.0 Python package. Data quality: The time series are raw, unprocessed data. They have no breaks. asNeeded completed