Atmospheric neutral temperature distribution at the mesopause altitude

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Scientific paper

In November 1994 and August 1997 the Cryogenic Infrared Spectrometers and Telescopes for the Atmosphere (CRISTA) instrument performed a global measurement (72S 72N) of infrared limb radiance from 4 to 71μm in the altitude range 6 180 km. Using a non-local thermodynamic equilibrium (non-LTE) model that couples the collisional, radiative and photochemical processes, the kinetic temperature was recovered from 15μmCO2 emission for CRISTA-1 and -2 missions by direct assimilation of the integrated limb radiances between 72 and 120 km. Falling sphere and airglow validation measurements at NASA/GSFC Wallops Flight Facility (WFF) and the Mesosphere Thermosphere Emissions for Ozone Remote Sensing (METEORS) experiment at White Sands Missile Range were coordinated with CRISTA during the field campaign. The derived temperatures show good agreement with these rocket soundings, partial climatology obtained from Rayleigh scattering observations by Wind Imaging Interferometer (WINDII) on the Upper Atmosphere Research Satellite (UARS) and NRLMSISE-00 model.

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