PROPERTIES OF DUST IN THE MARS ATMOSPHERE - A REVISED ANALYSIS OF PHOBOS KRFM DATA/

Citation
Mw. Wuttke et al., PROPERTIES OF DUST IN THE MARS ATMOSPHERE - A REVISED ANALYSIS OF PHOBOS KRFM DATA/, Planetary and space science, 45(3), 1997, pp. 281-288
Citations number
32
Categorie Soggetti
Astronomy & Astrophysics
Journal title
ISSN journal
00320633
Volume
45
Issue
3
Year of publication
1997
Pages
281 - 288
Database
ISI
SICI code
0032-0633(1997)45:3<281:PODITM>2.0.ZU;2-7
Abstract
During the 1989 Phobos 2 mission, photometric observations of the equa torial region of Mars were made in eight spectral bands in the range f rom 315 to 550 nm by the KRFM spectrometer. The first analysis of thes e data which aimed at extracting the optical properties of the atmosph eric dust (Moroz et al., 1993) used an approximate approach for the ra diative transfer, underestimating the effect of multiple scattering. T he present analysis of the same data corrects for this limitation with the use of a doubling/adding method. The new analysis yields comparab le values for the optical depth in the range 0.1-0.15. However, the im aginary part of the refraction index of the atmospheric particles almo st doubles: m(i) = 0.030 +/- 0.005 for 315 nm and m(i) = 0.012 +/- 0.0 03 for 550 nm, compared with 0.015 and 0.005 before, while it continue s to decrease as a function of wavelength. (C) 1997 Elsevier Science L td.