{"ob_id":20070,"uuid":"2509209077c148b0b019b8ed2ffd8624","title":"Reading -atmospheric electric potential gradient","abstract":"Potential gradient is measured using a JCI Chilworth 131 adverse conditions field meter.  It is mounted on a 3m metal pole on the atmospheric observatory, which has a number of metal structures (including 10m tower, fence) within 30m of the senor.  Calibration of the field meter alongside a longwire antenna was performed during 2006 to establish the site distortion factor.  This correction factor is applied to the raw data to derive the potential gradient at 1m.\r\nCalibration publication: A.J. Bennett and R.G. Harrison, In situ calibration of atmospheric air conductivity measurements Rev Sci Instrum 77, 016103 (2006)\r\n\r\n\r\nThis is used in the  Glocaem potential gradient network","keywords":"glocaem","identifier_set":["https://catalogue.ceda.ac.uk/api/v2/identifiers/9019/?format=json"],"instrumentType":"instrument","subInstrument":[],"responsiblepartyinfo_set":["https://catalogue.ceda.ac.uk/api/v2/rpis/76355/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/141034/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/141037/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/141038/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/76356/?format=json"]}