Physics – Optics
Scientific paper
Feb 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991p%26ss...39..199m&link_type=abstract
(Colloquium on Phobos-Mars Mission, Paris, France, Oct. 23-27, 1989, Proceedings. A91-29558 11-91) Planetary and Space Science (
Physics
Optics
20
Aerosols, Atmospheric Optics, Infrared Radiometers, Mars Atmosphere, Mars Surface, Spectrophotometers, Mie Scattering, Optical Properties, Planetary Limb, Refractivity, Satellite Observation, Mars, Atmosphere, Aerosols, Spacecraft Observations, Phobos 2 Mission, Optical Properties, Analysis, Surface, Refractive Index, Dust, Shape, Haze, Particles, Absorption, Size, Depth, Clouds, Density, Albedo, Krfm Instrument, Brightness, Calculations, Wavelengths, Photometry, Water Ice, Comparisons, Geothite, Roughness,
Scientific paper
On the basis of photometric measurements both constant dust haze and high altitude ice clouds on the equatorial part of Mars were analyzed. The imaginary part of the refraction index k from 0.01 to 0.03 at 315 nm and from 0.005 to 0.01 at 550 nm was estimated for constant dust haze, using Mie theory for spherical particles. It is noted that these values for k are a few times higher than those obtained by the laboratory tests of terrestrial analogs including basalt, andesite, and montmorillonite. Two possible explanations for this phenomenon are presented, citing the irregular shape of particles and/or the presence of some more absorbing substances as potentially influential.
Bibring Jean-Pierre
Combes Michel
Esposito Larry
Ganpantzerova O. F.
Goroshkova N. V.
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