Validation of ACE and OSIRIS ozone and NO2 measurements using ground-based instruments at 80° N.

The article presents a study that compares the optical spectrograph and infrared imager system (OSIRIS) and the atmospheric chemistry experiment (ACE) ozone and NO₂ measurements from the space since 2001 to 2003 using ground-based instruments at the Polar Environment Atmospheric Research Laboratory (PEARL) in Eureka, Canada. The study uses four kinds of zenith-sky differential optical absorption spectroscopy. The result indicates that both ACE and OSIRIS continue to perform well.