{"ob_id":32701,"computationComponent":[{"ob_id":32700,"uuid":"2b2b435fec204442a44ff2bf173d78b1","title":"Derivation of the Antarctic Ice Sheet CCI Ice Velocity v1 dataset from Sentinel-1","abstract":"The 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":"","inputDescription":null,"outputDescription":null,"softwareReference":null,"identifier_set":[]}],"acquisitionComponent":[{"ob_id":32699,"independentInstrument":[],"instrumentplatformpair_set":[{"ob_id":12583,"platform":"https://catalogue.ceda.ac.uk/api/v2/platforms/12319/?format=json","instrument":"https://catalogue.ceda.ac.uk/api/v2/instruments/12313/?format=json","relatedTo":{"ob_id":32699,"uuid":"8ee58d233916481db9f0b25c30ae9ad1","short_code":"acq"}},{"ob_id":12584,"platform":"https://catalogue.ceda.ac.uk/api/v2/platforms/20017/?format=json","instrument":"https://catalogue.ceda.ac.uk/api/v2/instruments/12313/?format=json","relatedTo":{"ob_id":32699,"uuid":"8ee58d233916481db9f0b25c30ae9ad1","short_code":"acq"}}]}],"identifier_set":[],"responsiblepartyinfo_set":["https://catalogue.ceda.ac.uk/api/v2/rpis/145786/?format=json"]}