The analysis of SPIRE measurements of atmospheric limb CO2(nu2) fluorescence

Details The analysis of SPIRE measurements of atmospheric limb CO2(nu2) fluorescence The analysis of SPIRE measurements of atmospheric limb CO2(nu2) fluorescence

Oct 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985jgr....90.9783c&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 90, Oct. 1, 1985, p. 9783-9788. DNA-USAF-supported research.

Computer Science

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Atmospheric Radiation, Carbon Dioxide, Fluorescence, Infrared Radiation, Spectral Signatures, Atmospheric Chemistry, Radiance, Rocket Sounding, Signal To Noise Ratios

Scientific paper

The Spectral Infrared Rocket Experiment (SPIRE) limb measurements of infrared radiation in the 15 micron region at altitudes above about 100 km are reviewed. The dominant radiation source in this spectral region is clearly identified as the CO2(nu2) band. An inversion technique, applicable to the analysis of optically thin radiation sources, is used to convert the limb spectral data to local volume radiances. The resulting local CO2(nu2) radiances/concentrations are remarkably uniform from spatial scan to spatial scan even though look angles varied over 180 deg and the observed radiation encompassed ranges of the order of 1000 km. Individual CO2(nu2) band shapes are also examined in order to evaluate rotational temperature as a function of altitude. Scan-to-scan variations in the temperatures are, for the most part, not large, and within experimental uncertainties the rotational temperatures reasonably well bracketed the anticipated translational temperature.

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