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   The site:      cindi 3 cesar site






   The schedule:cindi 3 calendar













   The aims:   



















  • Semi-blind intercomparison of UV-Vis (MAX-)DOAS sensors, with external referee:

    • Assess consistency of instruments (following FRM principles)

    • Certification of (new) instruments contributing to ACTRIS/NDACC

  • Provide training on various aspects of instrument operation, calibration, QA/QC of data

  • Motivate R&D on new products developments, harmonization of retrieval strategies, etc

  • Target species:

    • main: NO2, O3

    • secondary: HCHO, CHOCHO and aerosols

    • other: HONO, BrO, H2O

  • Products to intercompare:

    • slant columns from direct-sun and sky (MAX-DOAS) measurements

    • Vertical columns

    • Partial columns & profiles