Preliminary Results of Venus Observations Between 8 and 13 Microns

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  • 1 Goddard Space Flight Center, NASA, Greenbelt, Md.
  • | 2 Consultants and Designers, Inc., Greenbelt, Md.
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Abstract

The emission spectrum of Venus has been observed between 750 and 1250 cm−1 from the 61-inch Harvard Observatory telescope using a Michelson interferometer capable of resolving one wavenumber. A preliminary analysis confirms a broad absorption-like feature near 890 cm−1. The 960 and 1060 cm−1 CO2 bands are weak, if observable at all. The 791 cm−1 CO2 Q branch seems to be stronger in the Venus spectra than in the lunar comparison spectrum. The measured brightness temperature of about 250K is slightly higher than most previous estimates.

Abstract

The emission spectrum of Venus has been observed between 750 and 1250 cm−1 from the 61-inch Harvard Observatory telescope using a Michelson interferometer capable of resolving one wavenumber. A preliminary analysis confirms a broad absorption-like feature near 890 cm−1. The 960 and 1060 cm−1 CO2 bands are weak, if observable at all. The 791 cm−1 CO2 Q branch seems to be stronger in the Venus spectra than in the lunar comparison spectrum. The measured brightness temperature of about 250K is slightly higher than most previous estimates.

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