Determination of the amount of absorption in the earth's atmosphere at 460 microns

Details Determination of the amount of absorption in the earth's atmosphere at 460 microns Determination of the amount of absorption in the earth's atmosphere at 460 microns

Dec 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977sva....21..746z&link_type=abstract

(Astronomicheskii Zhurnal, vol. 54, Nov.-Dec. 1977, p. 1314-1318.) Soviet Astronomy, vol. 21, Nov.-Dec. 1977, p. 746-748. Trans

Astronomy and Astrophysics

Astronomy

Absorptivity, Astronomical Observatories, Atmospheric Attenuation, Infrared Absorption, Atmospheric Moisture, Infrared Detectors, Optical Thickness, Water Vapor

Scientific paper

Results are presented for a determination of total vertical absorption in the atmospheric window centered at a wavelength of 460 microns. Measurements were performed at a height of approximately 3000 m with an n-InSb detector. The zenith atmospheric optical depth at 460 microns is found to be equal to 1.8 times the absolute humidity measured in grams per cubic centimeter. The measurements suggest a water-vapor absorption coefficient of 55 dB/km at 460 microns under standard conditions at a scale height of 1.5 km.

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