Observations of limb radiance with cryogenic spectral infrared rocket experiment

Details Observations of limb radiance with cryogenic spectral infrared rocket experiment Observations of limb radiance with cryogenic spectral infrared rocket experiment

Oct 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985jgr....90.9763s&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 90, Oct. 1, 1985, p. 9763-9775. DNA-USAF-supported research.

Computer Science

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52

Atmospheric Radiation, Earth Atmosphere, Earth Limb, Infrared Spectra, Rocket Sounding, Rocket-Borne Instruments, Attitude Control, Carbon Dioxide, Cryogenic Cooling, Infrared Spectrometers, Nitric Oxide, Optical Measurement, Ozone, Water Vapor

Scientific paper

Infrared emission spectra (ES) from the earth limb atmosphere, measured by the Spectral Infrared Rocket Experiment in 1977, are discussed, along with a description of the spectrometer system and the limb-viewing geometry. ES (in the 1.4 to 16.5 micron range) from CO2, NO, O3, O2, HNO3, and water vapor are presented and compared with various theoretical emission models. The measurements establish the dominant role of NO in the heat balance of the atmosphere above 100 km, with the concentrations of NO increasing with the altitude. Strong 15-micron CO2 radiation between 95 and 110 km points to its significant contribution to cooling at high altitudes. The solar photodissociation of O3 causes large day/night variations seen at 9.6 microns. Not anticipated was intense solar fluorescence observed at 2.7 microns, which is explained by mechanisms involving CO2 and H2O. As expected, Rayleigh scattering was the dominant daytime source of radiation between 1 and 3 microns in the limb atmosphere for tangent heights of up to 40 km.

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