{"ob_id":7817,"uuid":"01160c6f494f98c6aa938b2695f84de5","title":"ENVISAT satellite: Advanced Synthetic Aperture Radar (ASAR) data","abstract":"The European Space Agency's Synthetic Aperture Radar (SAR) instruments have been flown on board ERS-1, ERS-2 and the Advanced SAR (ASAR) on board Envisat. The ERS-1, ERS-2 and Envisat satellites, launched in 1991, 1995 and 2002 respectively, are ESA multi-payload, Earth observation satellites.\r\n\r\nThis dataset contains Advanced Synthetic Aperture Radar(ASAR) data from the European Remote Sensing satellites ERS-1 and ERS-2, and Advanced SAR data from Envisat.  \r\n\r\nThe ERS-1 mission began in 1991 and ended in 2000, and ERS-2 and Envisat are still ongoing.  SAR provides high resolution images, ocean wave spectra data and wind direction vector data.  They are available through the NEODC to UK based students only.","keywords":" ESA, SAR, satellite","publicationState":"published","dataPublishedTime":"2007-08-09T13:42:32","doiPublishedTime":null,"updateFrequency":"unknown","status":"completed","result_field":{"ob_id":"https://catalogue.ceda.ac.uk/api/v2/observations/7818/?format=json","dataPath":"/neodc/esasar/envisat_asar/","oldDataPath":[],"storageLocation":"internal","storageStatus":"online","volume":4316087378,"numberOfFiles":96,"fileFormat":"Data are tar formatted\r\n\r\n"},"timePeriod":"https://catalogue.ceda.ac.uk/api/v2/times/2245/?format=json","geographicExtent":"https://catalogue.ceda.ac.uk/api/v2/bboxes/1/?format=json","nonGeographicFlag":false,"phenomena":["https://catalogue.ceda.ac.uk/api/v2/phenomona/22848/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/25947/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/25995/?format=json"],"dataLineage":"Data collected and prepared by ESA before a copy was obtained directly from ESA by NEODC for use by UK student community","removedDataTime":null,"removedDataReason":"","language":"English","identifier_set":["https://catalogue.ceda.ac.uk/api/v2/identifiers/5073/?format=json"],"projects":["https://catalogue.ceda.ac.uk/api/v2/projects/7819/?format=json"],"observationcollection_set":["https://catalogue.ceda.ac.uk/api/v2/observationcollections/7800/?format=json","https://catalogue.ceda.ac.uk/api/v2/observationcollections/30129/?format=json"],"responsiblepartyinfo_set":["https://catalogue.ceda.ac.uk/api/v2/rpis/32310/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/32315/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/32309/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/32312/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/32313/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/32314/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/32316/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/32311/?format=json"],"procedureAcquisition":null,"procedureCompositeProcess":"https://catalogue.ceda.ac.uk/api/v2/composites/7823/?format=json","procedureComputation":null,"permissions":[{"ob_id":"https://catalogue.ceda.ac.uk/api/v2/observations/2537/?format=json","useLimitation":null,"accessConstraints":null,"accessCategory":"restricted","accessRoles":"esasar","label":"restricted: esasar group","licenceURL":"https://artefacts.ceda.ac.uk/licences/specific_licences/esasar.pdf","licenceClassifications":"academic, specific"}],"discoveryKeywords":[{"ob_id":1138,"name":"NDGO0003"}]}