{"ob_id":15410,"uuid":"b1853545dadc47958920477ccb085b9a","title":"University of Manchester: Aerodyne Tunable IR Laser Direct Absorption Spectrometer (TILDAS)","abstract":"Aerodyne Tunable IR Laser Direct Absorption Spectrometer (TILDAS) model QC-TILDAS-CS is a laser spectrometer producing measurements of Ethane dry mole fraction at 1 Hz.\r\n\r\nThe QC-TILDAS-CS is manufactured by Aerodyne Research Inc. (USA). It measures ethane dry mole fraction in ambient air. Sample air is pumped through a cell into which the single laser beam is directed. The laser beam passes many times across the cell before exiting onto a photodetector. The laser frequency is tuned across an ethane absorption line - the depth of this lines is used to determine the ethane mole fraction.","keywords":"man-qcl, FAAM, TILDAS","identifier_set":["https://catalogue.ceda.ac.uk/api/v2/identifiers/8835/?format=json"],"instrumentType":"spectrometer","subInstrument":[],"responsiblepartyinfo_set":["https://catalogue.ceda.ac.uk/api/v2/rpis/59653/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/59654/?format=json"]}