Atomic oxygen concentrations from OH and O2 nightglow measurements

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Aeronomy, Atmospheric Composition, Hydroxyl Emission, Nightglow, Oxygen Atoms, Rocket Sounding, Vertical Distribution

Scientific paper

Simultaneous rocket-borne measurements of three spectral regions in the Delta = 2 sequence of the OH Meinel System centered at 1.55, 1.63 and 1.69 microns, respectively, and the 0-0 band of the Infrared Atmospheric System (IAS) of O2 at 1.27 microns are used to derive the atomic oxygen abundances present during the observations. Altitude profiles of atomic oxygen from OH nightglow observations in the 80-92 km altitude region are obtained by two different methods. The results show a reasonable agreement with other direct and indirect determinations of the O-concentration. Atomic oxygen abundances derived from IAS measurements at night-time show a maximum of 6.88 x 10 to the 11th/cu cm at an altitude of 96 km, and agree well, within both the margins of error of the measurements and the methods employed, with those derived from OH nightglow observations.

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