Mathematics
Scientific paper
Aug 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978icar...35..209e&link_type=abstract
Icarus, vol. 35, Aug. 1978, p. 209-226.
Mathematics
1
Infrared Spectroscopy, Mars Surface, Optical Properties, Soils, Atmospheric Models, Basalt, Chemical Composition, Limonite, Mars Atmosphere, Montmorillonite
Scientific paper
Medium spectral resolution (20 kaysers) infrared measurements of the Martian disk made between 2900 and 5600 kaysers from the NASA Lear Airborne Observatory have been successfully compared with predictions derived from a model of the Martian soil and atmosphere. Modeling of the Martian atmosphere permitted the extraction of Martian soil reflectance in the CO2 bands centered at 3657 kaysers. Three Martian soil analogs previously considered acceptable - limonite, montmorillonite, and basalt - were analyzed to determine the optical complex indices of refraction in the same range as the airborne observations, for mathematical modeling. A characteristic surface particle size approximately 1 to 3 microns diameter is indicated. It is concluded that the Martian soil surface near-infrared optical properties are consistent with a soil composition similar to montmorillonite or limonite, mixed with a basalt.
Egan Walter G.
Hilgeman Theodore
Smith Linda
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