The CINDI campaign (Cabauw Intercomparison Campaign of Nitrogen Dioxide measuring Instruments) is a CEOS, GEOMON and NDACC initiative. It takes place in Cabauw (52° N, 5° E), The Netherlands, during June-July 2009 (http://www.knmi.nl/samenw/cindi/).

The main objective of this campaign is to intercompare the NO₂ measuring instruments that can be used for validation of tropospheric NO₂ from satellites. The campaign should result in an estimate of the accuracy of the NO₂ tropospheric columns and profiles for the participating instruments under different atmospheric conditions (clouds/aerosols) and viewing geometries. Many different in-situ and remote sensing instruments will participate. Apart from NO₂, other parameters will be measured and intercompared, among which O₃, aerosol, HCHO, CHOCHO, and BrO.

BIRA-IASB participates to this campaign with several instruments:

• a MAXDOAS (300-700 nm)
• a MiniDOAS (290-435 nm)
• a MobileDOAS

For more information, please contact Michel Van Roozendael