TITLE: Remote sensing of lower thermospheric temperatures with the RAIDS experiment on the International Space Station (Invited)

Details TITLE: Remote sensing of lower thermospheric temperatures with the RAIDS experiment on the International Space Station (Invited) TITLE: Remote sensing of lower thermospheric temperatures with the RAIDS experiment on the International Space Station (Invited)

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsa52a..03c&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #SA52A-03

Physics

[0310] Atmospheric Composition And Structure / Airglow And Aurora, [0350] Atmospheric Composition And Structure / Pressure, Density, And Temperature, [0355] Atmospheric Composition And Structure / Thermosphere: Composition And Chemistry

Scientific paper

Current research into the processes operative in the lower thermosphere and upper mesosphere of the Earth's atmosphere is stressing the importance of dynamic interactions in determining the physical and chemical state of the region. Exploration of this sparsely sampled region was the purpose of the Radiation and Ionospheric Detection System (RAIDS) experiment flown on the International Space Station (ISS). RAIDS comprises 8 instruments including a near infrared spectrometer (NIRS) designed to routinely measure temperatures in the lower thermosphere from approximately 100 to 140 km altitude. Commencing in October, 2009, limb profiles of the neutral kinetic temperature have been obtained in a limb scanning mode viewing aft from the experiment porch on the JEM module. Spectra of the airglow are obtained across the wavelength range 725 to 870 nm in a step/stare mode of the RAIDS experiment. Dayside and nightside temperatures are derived from spectral measurements of the O2(1 Sigma) Atmospheric 0-0 and 1-1 band profiles. The temperature profiles obtained are in good agreement on average with the MSIS model, however they show significantly more variability than given by MSIS or TIEGCM model runs. The variability shows up as scan to scan variations in the temperature profile, where due to the data collection cadence, most of the measurements are collected over about 5 degrees in latitude and spaced approximately 15 degrees in latitude thus providing clues to the scale size of the variations. Seasonal trends and comparisons with TIMED/SABER measurements will be presented.

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