Atmospheric extinction in the four-micron region

Details Atmospheric extinction in the four-micron region Atmospheric extinction in the four-micron region

Aug 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979aj.....84.1235w&link_type=abstract

Astronomical Journal, vol. 84, Aug. 1979, p. 1235-1243.

Astronomy and Astrophysics

Astronomy

4

Atmospheric Attenuation, Earth Atmosphere, Infrared Astronomy, Absorptivity, Carbon Dioxide, Nitrogen, Nitrous Oxides, Water

Scientific paper

Extinction by the terrestrial atmosphere, derived from scanner observations of stars, is found to be strongly wavelength-dependent between 3.98 and 4.07 microns. Synthetic extinction coefficients, generated by using absorption coefficients measured in the laboratory and a model terrestrial atmosphere, indicate that the dominant opacity source is pressure-induced absorption by the fundamental band of N2. Smaller contributors in this region are continuous absorption by H2O and CO2, discrete lines of N2O, and aerosol extinction.

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