{"ob_id":30126,"uuid":"3534bbf43fa14e40bc61944eaf664511","title":"ESA Greenhouse Gases Climate Change Initiative (GHG_cci): Column-averaged methane from Sentinel-5P, generated with the WFM-DOAS algorithm, version 1.2","abstract":"This product is the column-average dry-air mole fraction of atmospheric methane, denoted XCH4. It has been retrieved from radiance measurements from the TROPOspheric Monitoring Instrument (TROPOMI) on the Sentinel-5 Precursor satellite in the 2.3 µm spectral range of the solar spectral range,  using the Weighting Function Modified Differential Optical Absorption Spectroscopy (WFM-DOAS or WFMD) retrieval algorithm.   This dataset is also referred to as CH4_S5P_WFMD.\r\n\r\nThe WFMD algorithm is based on iteratively fitting a simulated radiance spectrum to the measured spectrum using a least-squares method. The algorithm is very fast as it is based on a radiative transfer model based look-up table scheme. The product is limited to cloud-free scenes on the Earth's day side.\r\n\r\nThis data was produced as part of the European Space Agency's (ESA) Greenhouse Gases (GHG) Climate Change Initiative (CCI) project.","keywords":"ESA, CCI, satellite, Sentinel-5 Precursor, TROPOMI, atmosphere, methane, carbon monoxide","publicationState":"citable","dataPublishedTime":"2020-03-31T16:11:33","doiPublishedTime":"2020-04-01T08:04:32","updateFrequency":"","status":"superseded","result_field":{"ob_id":"https://catalogue.ceda.ac.uk/api/v2/observations/30125/?format=json","dataPath":"/neodc/esacci/ghg/data/cci_plus/CH4_S5P_WFMD/v1.2/","oldDataPath":[],"storageLocation":"internal","storageStatus":"online","volume":16714250286,"numberOfFiles":376,"fileFormat":"Data are netCDF formatted."},"timePeriod":"https://catalogue.ceda.ac.uk/api/v2/times/8184/?format=json","geographicExtent":"https://catalogue.ceda.ac.uk/api/v2/bboxes/529/?format=json","nonGeographicFlag":false,"phenomena":["https://catalogue.ceda.ac.uk/api/v2/phenomona/54763/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/54764/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/55532/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/55533/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/63576/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/66973/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/66974/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/68636/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/68637/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/69622/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/69623/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/69628/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/69634/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/69635/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/74642/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/74644/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/74645/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/74648/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/74649/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/74650/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/74651/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/74653/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/74654/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/74655/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/74658/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/74659/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/74660/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/79736/?format=json"],"dataLineage":"Data were processed by the ESA CCI GHG project team and supplied to CEDA as part of the ESA CCI Open Data Portal Project.","removedDataTime":null,"removedDataReason":"","language":"English","identifier_set":["https://catalogue.ceda.ac.uk/api/v2/identifiers/10706/?format=json"],"projects":["https://catalogue.ceda.ac.uk/api/v2/projects/13295/?format=json"],"observationcollection_set":["https://catalogue.ceda.ac.uk/api/v2/observationcollections/12808/?format=json"],"responsiblepartyinfo_set":["https://catalogue.ceda.ac.uk/api/v2/rpis/130170/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/130167/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/130168/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/130169/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/130171/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/130172/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/130173/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/130165/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/130582/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/130583/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/130584/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/130585/?format=json"],"procedureAcquisition":null,"procedureCompositeProcess":null,"procedureComputation":null,"permissions":[{"ob_id":"https://catalogue.ceda.ac.uk/api/v2/observations/2564/?format=json","useLimitation":null,"accessConstraints":null,"accessCategory":"public","accessRoles":null,"label":"public: None group","licenceURL":"https://artefacts.ceda.ac.uk/licences/specific_licences/esacci_ghg_terms_and_conditions.pdf","licenceClassifications":"any"}],"discoveryKeywords":[{"ob_id":1138,"name":"NDGO0003"}]}