Mathematics – Logic
Scientific paper
Sep 1974
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974ladi.reptq....a&link_type=abstract
Final Report, Jun. 1973 - Sep. 1974 Little (Arthur D.), Inc., Cambridge, MA.
Mathematics
Logic
Dust, Infrared Spectra, Mariner 9 Space Probe, Mars Atmosphere, Radiative Transfer, Computer Programs, Minerals, Spectrum Analysis
Scientific paper
A description is given of the modification of a theory on the reflectance of particulate media so as to apply it to analysis of the infrared spectra obtained by the IRIS instrument on Mariner 9. With the aid of this theory and the optical constants of muscovite mica, quartz, andesite, anorthosite, diopside pyroxenite, and dunite, modeling calculations were made to refine previous estimates of the mineralogical composition of the Martian dust particles. These calculations suggest that a feldspar rich mixture is a very likely composition for the dust particles. The optical constants used for anorthosite and diopside pyroxenite were derived during this program from reflectance measurements. Those for the mica were derived from literature reflectance data. Finally, a computer program was written to invert the measured radiance data so as to obtain the absorption coefficient spectrum which should then be independent of the temperature profile and gaseous component effects.
Aronson James R.
Emslie Gordon A.
Strong P. F.
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