4259989a-8485-4066-a2e8-9678d63056b4 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 2024-12-09 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 Annual georeferenced rasters of ice-surface velocity for the Larsen C ice shelf, Antarctica, between 2015 and 2022 2024-12-09 creation 2024-12-09 revision 2024-12-09 publication 2024-12-09 released 1.0 https://doi.org/10.5285/4259989a-8485-4066-a2e8-9678d63056b4 doi GB/NERC/BAS/PDC/01949 https://data.bas.ac.uk/ NE/T008016/1 award Please cite this item as: Luckman, A., & Bevan, S. (2024). Annual georeferenced rasters of ice-surface velocity for the Larsen C ice shelf, Antarctica, between 2015 and 2022 (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/4259989a-8485-4066-a2e8-9678d63056b4 Magnitude and x and y components of surface speed on the Larsen C ice shelf, Antarctica. The datasets are annual means from 2015 to 2022 at a horizontal resolution of 100 m. The data are based on feature tracking of Sentinel 1 Synthetic Aperture Radar (SAR) satellite data. The velocities were created to support a NERC-funded project investigating ice-shelf rift propagation, by Prof. Adrian Luckman. NERC standard grant NE/T008016/1. No credit. completed Luckman, Adrian Swansea University Researcher author Bevan, Suzanne Swansea 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 Motion/Ice Sheet Motion EARTH SCIENCE > Hydrosphere > Glaciers/Ice Sheets > Glacier Motion/Ice Sheet Motion 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 Antarctica Larsen C feature-tracking ice shelf velocity theme Larsen C ice shelf Antarctica place Elevation 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 largerWorkCitation url url crossReference doi doi crossReference doi doi crossReference textTable eng utf8 inlandWaters -64.592 -61.152 -69.824 -65.564 2015-01-01 2022-12-31 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 image/png image/tiff bytes 945396122 http://ramadda.data.bas.ac.uk/repository/entry/show?entryid=4259989a-8485-4066-a2e8-9678d63056b4 WWW:LINK-1.0-http--link Get Data Download data download bytes 945396122 http://ramadda.data.bas.ac.uk/repository/entry/show?entryid=4259989a-8485-4066-a2e8-9678d63056b4 WWW:LINK-1.0-http--link Get Data Download data download dataset Methodology: Speeds were measured by feature-tracking Sentinel-1A and 1B SAR images with a temporal separation of 6 or 12 days. Displacements in SAR image geometry were filtered twice: first by a signal to noise ratio based on the cross-correlation of image patches, and then according to deviation from the mean displacement within a neighbourhood. The filtered displacements were converted from the SAR geometry to ground-range geometry, and the results geocoded using the RAMP Digital Elevation Model (Liu et al., 2015). The vertical tidal signal was removed using the Circum-Antarctic Tidal Simulation version 2008 (CATS:2008) model (Howard and Padman, 2015). Individual maps of velocity (between 30 and 122 per year) were averaged to create annual means. Data collection: The Sentinel data were supplied by ESA and processed using Gamma Remote Sensing software. Data quality: The name of each annual Geotiff contains the number of feature-tracked image pairs contributing to the measurement. Images which make up a pair may have either a 6-day (between Sentinel 1A and Sentinel 1B) or a 12-day time separation (Sentinel 1A only). Image-pairs with a 12-day separation have poorer velocity retrieval owing to increased surface decorrelation. Therefore, quality is best for the 2017, 2018, 2019 and 2020 means when both Sentinel 1A and Sentinel 1B were both in operation. asNeeded completed