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The Spectrum of Mars in the Region 1800–3200 cm−1

Published online by Cambridge University Press:  14 August 2015

Reinhard Beer
Reinhard Beer*
Affiliation:
Space Sciences Division, Jet Propulsion Laboratory, Pasadena, Calif., U.S.A.

Abstract

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During the 1971 opposition of Mars, new infrared spectra covering the region 1800–3200 cm−1 (3.1–5.6μ) were taken at a resolution of 0.095 cm−1 using a Connes'-type Fourier spectrometer on the 2.7 m telescope, McDonald Observatory. Spectra were obtained near 6° and 33° phase and were calibrated against the Sun, standard stars and an internal black body.

No new trace constituents have, as yet, been found in the spectra, but several previously unobserved combination and isotopic bands of CO2 are visible. It has also been found possible to fit fairly well defined kinetic temperatures and Bond albedos to the two sets of data. The kinetic temperatures have been determined by a new technique. It is found that the albedo at 33° phase, which was determined a few days after the onset of the great dust storm of 1971, was significantly higher than for the clear atmosphere. The explanation for this phenomenon must await detailed radiative transfer calculations for a dust-laden atmosphere.

Type
Part II Terrestrial Planets
Information
Symposium - International Astronomical Union , Volume 65: Exploration of the Planetary System , 1974 , pp. 229 - 239
Copyright
Copyright © Reidel 1974 

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