ACROSS_LCE_PRG_PTR-ToF_MS_Gas_30 min_L1

The concentration of Volatile Organic Compounds (VOC) was measured at the ground–based PRG urban site during ACROSS using a Proton Tranfer Reaction - Time of Flight - Mass Spectrometry (PTR-ToF-MS 4000X2 Ionicon). The instrument was installed on the roof of the building at about 30 m height above the ground level. Data were acquired continuously at 10 sec time resolution then avered to 30 minutes. Gas phase measurements were alternated every 15 minutes with particle phase. Data disturbed or missing data during the campaign were removed from this file and intentionally left empty. Background were performed regularly and the instrument was calibrated with a certified gas standard containing 100+-20ppb of a 10 VOC mixture. Available data started from June 16th 2023, until July 12th 2021. Concentrations are provided in ppb. Fragmentation and clusters pattern have not been addressed at this stage for the public available database.