{"ob_id":32601,"uuid":"00fe090efc58446e8980992a617f632f","title":"ESA Antarctic Ice Sheet Climate Change Initiative (Antarctic_Ice_Sheet_cci): Antarctic Ice Sheet monthly velocity from 2017 to 2020, derived from Sentinel-1, v1","abstract":"This dataset contains monthly gridded ice velocity maps of the Antarctic Ice Sheet derived from Sentin\r\nel-1 data acquired between 2017-01-01 and 2020-08-31.  It was generated by ENVEO, as part of the ESA Antarctic Ice Sheet Climate Change Initiative project (Antarctic_Ice_Sheet_cci).\r\n\r\nThe surface velocity is derived by applying feature tracking techniques using Sentinel-1 synthetic aperture radar (SAR) data acquired in the Interferometric Wide (IW) swath mode. Ice velocity is provided at 200m grid spacing in Polar Stereographic projection (EPSG: 3031). The horizontal velocity components are provided in true meters per day, towards easting and northing direction of the grid. The vertical displacement is derived from a digital elevation model. Provided is a NetCDF file with the velocity components: vx, vy, vz, along with maps showing the magnitude of the horizontal components, the valid pixel count and uncertainty. The product combines all ice velocity maps, based on 6- and 12-day repeats, acquired within a single month in a monthly averaged product.","keywords":"Antarctic, Ice Sheet Velocity, ESA, CCI","publicationState":"citable","dataPublishedTime":"2021-06-17T14:01:35","doiPublishedTime":"2021-06-28T16:02:08.246398","updateFrequency":"","status":"completed","result_field":{"ob_id":"https://catalogue.ceda.ac.uk/api/v2/observations/32743/?format=json","dataPath":"/neodc/esacci/ice_sheets_antarctica/data/ice_velocity/antarctic_ice_sheet/sentinel_1/monthly/v1.0/","oldDataPath":[],"storageLocation":"internal","storageStatus":"online","volume":101295328588,"numberOfFiles":45,"fileFormat":"Data are in NetCDF format"},"timePeriod":"https://catalogue.ceda.ac.uk/api/v2/times/8953/?format=json","geographicExtent":"https://catalogue.ceda.ac.uk/api/v2/bboxes/2778/?format=json","nonGeographicFlag":false,"phenomena":["https://catalogue.ceda.ac.uk/api/v2/phenomona/12066/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/13204/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/13205/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/13206/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/13207/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/50347/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/50348/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/50349/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/50547/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/50548/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/62645/?format=json"],"dataLineage":"Data were processed by ENVEO as part of the ESA Antarctic Ice sheet CCI project and are archived on the ENVEO Cryoportal (http://cryoportal.enveo.at). They have been supplied to CEDA in the context of the ESA CCI Open Data Portal Project","removedDataTime":null,"removedDataReason":"","language":"English","identifier_set":["https://catalogue.ceda.ac.uk/api/v2/identifiers/10898/?format=json"],"projects":["https://catalogue.ceda.ac.uk/api/v2/projects/24700/?format=json"],"observationcollection_set":["https://catalogue.ceda.ac.uk/api/v2/observationcollections/24699/?format=json"],"responsiblepartyinfo_set":["https://catalogue.ceda.ac.uk/api/v2/rpis/145169/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/145170/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/145171/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/145172/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/145173/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/145174/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/145175/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/146442/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/145176/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/145177/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/145178/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/145179/?format=json"],"procedureAcquisition":null,"procedureCompositeProcess":"https://catalogue.ceda.ac.uk/api/v2/composites/32701/?format=json","procedureComputation":null,"permissions":[{"ob_id":"https://catalogue.ceda.ac.uk/api/v2/observations/2534/?format=json","useLimitation":null,"accessConstraints":null,"accessCategory":"public","accessRoles":null,"label":"public: None group","licenceURL":"https://artefacts.ceda.ac.uk/licences/specific_licences/esacci_icesheets_antarctic_terms_and_conditions.pdf","licenceClassifications":"any"}],"discoveryKeywords":[{"ob_id":1138,"name":"NDGO0003"},{"ob_id":1140,"name":"ESACCI"}]}