{"ob_id":3603,"uuid":"d8f637d7cd62db09b2d1720a3117bd23","title":"Chilbolton Facility for Atmospheric and Radio Research (CFARR) Grimm Optical Particle Counter data","abstract":"The Chilbolton Facility for Atmopsheric and Radio Research's aerosol particle concentration measurements are provided by a 164DM environmental dust monitor manufactured by Grimm Aerosol Technik. A Lufft WS500 weather station is incorporated into the instrument to provide co-located meteorological measurements. Alternatively, particle mass concentrations can be produced as PM1, PM2.5 and PM10 measurements. The instrument measures the size and number density of aerosol molecules by using a 0.5m vertical inlet to suck ambient air into a measurement chamber. The scattering of a laser beam transmitted through the chamber is used to deduce size and concentration information. It is operated continuously on the roof of a cabin at a height of 8m above ground at the Chilbolton Observatory site. Measurements are taken every 60s, providinga erosol particle concentration (counts/m3) in 31 size bins in the range 0.265-34.0 um, air temperature, relative humidity, air pressure, wind speed and wind direction. The instrument is calibrated every 18 months by the manufacturer","keywords":"CFARR, particle counter","publicationState":"published","dataPublishedTime":"2013-10-14T15:40:20","doiPublishedTime":null,"updateFrequency":"continual","status":"ongoing","result_field":{"ob_id":"https://catalogue.ceda.ac.uk/api/v2/observations/3604/?format=json","dataPath":"/badc/chilbolton/data/grimm","oldDataPath":[],"storageLocation":"internal","storageStatus":"online","volume":392513499,"numberOfFiles":1797,"fileFormat":"Data are netCDF formatted."},"timePeriod":"https://catalogue.ceda.ac.uk/api/v2/times/1028/?format=json","geographicExtent":"https://catalogue.ceda.ac.uk/api/v2/bboxes/64/?format=json","nonGeographicFlag":false,"phenomena":["https://catalogue.ceda.ac.uk/api/v2/phenomona/22455/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/50512/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/54762/?format=json","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/57531/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/57532/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/57533/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/57534/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/57535/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/57536/?format=json"],"dataLineage":"Data are collected by 4 radar systems, of which the largest is the 3 GHz Doppler radar (CAMRa), and 4 lidar systems, at Chilbolton Observatory, Hampshire.\r\nData are prepared by Chilbolton Facility for Atmospheric and Radio Research (CFARR) staff prior to submission to BADC for archiving.","removedDataTime":null,"removedDataReason":"","language":"English","identifier_set":["https://catalogue.ceda.ac.uk/api/v2/identifiers/2445/?format=json"],"projects":["https://catalogue.ceda.ac.uk/api/v2/projects/3464/?format=json"],"observationcollection_set":["https://catalogue.ceda.ac.uk/api/v2/observationcollections/3461/?format=json","https://catalogue.ceda.ac.uk/api/v2/observationcollections/7378/?format=json"],"responsiblepartyinfo_set":["https://catalogue.ceda.ac.uk/api/v2/rpis/15187/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/15192/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/15186/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/15189/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/15190/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/15191/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/15193/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/15188/?format=json"],"procedureAcquisition":"https://catalogue.ceda.ac.uk/api/v2/acquisitions/3606/?format=json","procedureCompositeProcess":null,"procedureComputation":null,"permissions":[{"ob_id":"https://catalogue.ceda.ac.uk/api/v2/observations/2522/?format=json","useLimitation":null,"accessConstraints":null,"accessCategory":"registered","accessRoles":null,"label":"registered: None group","licenceURL":"http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/","licenceClassifications":"any"}],"discoveryKeywords":[{"ob_id":1138,"name":"NDGO0003"}]}