HR: 13:40h
AN: SA23B-01    [Abstracts]
TI: UV Remote Sensing of the Mesosphere With OSIRIS
AU: * Llewellyn, E J
EM: edward.llewellyn@usask.ca
AF: ISAS, University of Saskatchewan, Dept. of Physics and Engineering Physics, 116 Science Place,, Saskatoon, SK S7N 5E2 Canada
AB: The OSIRIS instrument on the Odin satellite includes an optical spectrograph that makes limb measurements of both scattered sunlight and the airglow in the wavelength range 280-800 nm. While the scattered sunlight in the mesosphere is quite bright (typically 1E4 R/A at 70 km) it is possible to identify airglow features that are excited through the resonant absorption of sunlight. In this paper we present new mesospheric observations in the wavelength region 300-325 nm and suggest that the airglow feature at 308 nm is due to emission from the OH (A-X) system. With this identification we can determine the mesospheric profile of OH in the ground vibrational state. The possibility of determining the water vapour profile in the mesosphere is also discussed.
DE: 1610 Atmosphere (0315, 0325)
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0310 Airglow and aurora
DE: 0340 Middle atmosphere--composition and chemistry
DE: 0394 Instruments and techniques
SC: SPA-Aeronomy [SA]
MN: 2004 AGU Fall Meeting