Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990kosis..28..936m&link_type=abstract
Kosmicheskie Issledovaniia (ISSN 0023-4206), vol. 28, Nov.-Dec. 1990, p. 936-942. In Russian.
Astronomy and Astrophysics
Astronomy
1
Aerosols, Astronomical Photometry, Atmospheric Composition, Mars Atmosphere, Spaceborne Astronomy, Atmospheric Attenuation, Mars Surface, Optical Thickness, Particle Size Distribution, Surface Roughness
Scientific paper
Photometric limb-to-limb profiles of Mars were obtained in eight narrow bands between 320 and 550 nm with the Phobos-2 KRFM instrument. The imaginary part of the refractive index between 0.02 and 0.04 for 320 nm and less than 0.01 for 550 nm was estimated for a 'constant' dust haze with a nearly wavelength-independent optical depth of about 0.3. The absorbing properties of the material can be explained as due to basaltic rocks with a small fraction of goethite (2-3 percent). Particles with a relatively narrow size distribution with n = 1.31, kappa = 0, and tau = 0.15 can explain the bright spot above Arsia Mons.
Bibring Zh.-P.
Espozito L.
Ksanfomaliti L. V.
Moroz Vasiliy Ivanovich
Petrova Elena V.
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