The altitude profile of the infrared atmospheric system of O2 in twilight and early night: Derivation of ozone abundances

The altitude profile of the Infrared Atmospheric System (IAS) during twilight and early night contains an important fraction that is due to dayglow remnant and hence related to the ozone photolysis. We present here a method of extracting information on the ozone distribution during daytime from the altitude profile of the IAS measured in twilight or early night conditions. © 1992.