Determination of the C-12/C-13 and O-16/O-18 ratio in the Martian atmosphere by 10 micron heterodyne spectroscopy

Details Determination of the C-12/C-13 and O-16/O-18 ratio in the Martian atmosphere by 10 micron heterodyne spectroscopy Determination of the C-12/C-13 and O-16/O-18 ratio in the Martian atmosphere by 10 micron heterodyne spectroscopy

Jan 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...155..200s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 155, no. 1, Jan. 1986, p. 200-204.

Physics

Optics

10

Absorption Spectra, Abundance, Astronomical Spectroscopy, Infrared Spectroscopy, Mars Atmosphere, Viking Spacecraft, Carbon Isotopes, Cassegrain Optics, Heterodyning, High Resolution, Oxygen Isotopes, Mars, Atmosphere, Carbon, Oxygen, Isotopes, Isotopic Ratios, Spectra, Spectroscopy, Earth-Based Observations, Telescope Methods, Wavelengths, Infrared, Absorption, Models, Comparisons, Viking Missions, Radiation, Abundance, Landers, Equipment, Procedure, Techniques

Scientific paper

The planetary atmosphere of Mars was studied during the opposition of May, 1984, by means of a 10-micron heterodyne receiver mounted at the Cassegrain focus of a 3-m telescope. On the basis of a model of the Martian atmosphere, the isotopic ratios derived from the fully resolved absorption spectra obtained were compared with the results of Viking probe in situ measurements and terrestrial values; agreement is obtained within statistical errors. It is shown that highly resolving spectroscopy allows for the determination of isotopic ratios in remote sensing with a precision that is comparable to that of in situ mass spectroscopy.

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