{"ob_id":26516,"uuid":"74b47589019e45c187fb5e81b3ad4a31","title":"Sentinel 1A C-band Synthetic Aperture Radar (SAR): Interferometric Wide (IW) mode Ocean (OCN) Level 2 data, Instrument Processing Facility (IPF) v3","abstract":"This dataset contains level-2 Interferometric Wide swath (IW) Ocean (OCN) C-band Synthetic Aperture Radar (SAR) data from the European Space Agency (ESA) Sentinel 1A satellite. Level-2 data consists of geolocated geophysical products derived from Level-1. Sentinel 1A was launched on 3rd April 2014 and provides continuous all-weather, day and night imaging radar data. The IW mode is the main operational mode. These level 2 OCN products provide Ocean Wind field (OWI) and Surface Radial Velocity (RVL).\r\n\r\nThe OWI component is a ground range gridded estimate of the surface wind speed and direction at 10 m above the surface, derived from IW mode. The OWI component contains a set of wind vectors for each processed Level-1 input product. The norm is the wind speed in m/s and the argument is wind direction in degrees (meteorological convention = clockwise direction from where the wind blows with respect to the North). The spatial resolution of the SAR wind speed is 1 km for IW mode.\r\n\r\nThe RVL surface radial velocity component is a ground range gridded difference between the measured Level-2 Doppler grid and the Level-1 calculated geometrical Doppler. The RVL component provides continuity of the ASAR Doppler grid. The RVL estimates are produced on a ground-range grid.\r\n\r\nThese data are available via CEDA to any registered CEDA user.","keywords":"Sentinel, radar, Synthetic Aperture Radar, SAR, Interferometric Wide, IW, OCN","publicationState":"published","dataPublishedTime":"2021-06-23T15:39:03","doiPublishedTime":null,"updateFrequency":"asNeeded","status":"ongoing","result_field":{"ob_id":"https://catalogue.ceda.ac.uk/api/v2/observations/26517/?format=json","dataPath":"/neodc/sentinel1a/data/IW/L2_OCN/IPF_v3/","oldDataPath":[],"storageLocation":"internal","storageStatus":"online","volume":2637107498584,"numberOfFiles":1532998,"fileFormat":"These data are provided in the ESA safe format as downloaded from the Sentinel data hubs."},"timePeriod":"https://catalogue.ceda.ac.uk/api/v2/times/8985/?format=json","geographicExtent":"https://catalogue.ceda.ac.uk/api/v2/bboxes/1/?format=json","nonGeographicFlag":false,"phenomena":[],"dataLineage":"Data collected and prepared by European Space Agency (ESA). Downloaded from the Collaborative Hub for use by CEDA users.","removedDataTime":null,"removedDataReason":"","language":"English","identifier_set":[],"projects":["https://catalogue.ceda.ac.uk/api/v2/projects/12321/?format=json"],"observationcollection_set":["https://catalogue.ceda.ac.uk/api/v2/observationcollections/12314/?format=json","https://catalogue.ceda.ac.uk/api/v2/observationcollections/30129/?format=json"],"responsiblepartyinfo_set":["https://catalogue.ceda.ac.uk/api/v2/rpis/111421/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/145842/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/111423/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/111424/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/111427/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/111422/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/111426/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/111428/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/146100/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/111429/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/111425/?format=json"],"procedureAcquisition":null,"procedureCompositeProcess":"https://catalogue.ceda.ac.uk/api/v2/composites/26518/?format=json","procedureComputation":null,"permissions":[{"ob_id":"https://catalogue.ceda.ac.uk/api/v2/observations/2586/?format=json","useLimitation":null,"accessConstraints":null,"accessCategory":"public","accessRoles":null,"label":"public: None group","licenceURL":"https://sentinel.esa.int/documents/247904/690755/Sentinel_Data_Legal_Notice","licenceClassifications":"any"}],"discoveryKeywords":[{"ob_id":1138,"name":"NDGO0003"}]}