Development of a Mars dust characterization instrument

Abstract The atmosphere of Mars has a considerable load of suspended dust. Over time, this dust deposits out of the atmosphere. The mechanism and the temporal and geographical variation of this deposition are not well characterized. Measurements of settling rates and dust properties are of considerable scientific interest. Suspended dust affects the atmospheric solar absorption and thus the heat balance of Mars, as well as serving as nucleation sites for water and CO2 frost, while settled dust causes albedo changes across the surface; knowledge of dust properties is also of engineering interest to the design of mechanisms, solar arrays, and radiators. Two instruments have been designed and fabricated to measure the dust accumulation during the course of the Mars Pathfinder rover mission: a solar-cell coverglass transmission experiment to measure the change in optical opacity of a transparent coverglass as dust settles on the surface and a quartz crystal monitor to measure the mass of dust deposited on an oscillating quartz crystal as dust settles on the surface. An additional instrument, a CCD microscope to image individual dust particles is under development for flight on a future mission.

[1]  G. A. Landis,et al.  Dust-induced degradation of solar arrays on Mars , 1994, Proceedings of 1994 IEEE 1st World Conference on Photovoltaic Energy Conversion - WCPEC (A Joint Conference of PVSC, PVSEC and PSEC).

[2]  J. B. Pollack,et al.  Properties of dust in the martian atmosphere and its effect on temperature structure , 1978 .

[3]  Carl Sagan,et al.  Physical properties of the particles composing the Martian dust storm of 1971–1972 , 1977 .

[4]  Ralph A. Kahn,et al.  Properties of aerosols in the Martian atmosphere, as inferred from Viking lander imaging data , 1977 .

[5]  G. R. Gladstone,et al.  A new model for Mars atmospheric dust based upon analysis of ultraviolet through infrared observations from Mariner 9, Viking, and Phobos , 1995 .

[6]  Phillip P. Jenkins,et al.  A rotating arm using shape-memory alloy , 1995 .

[7]  J. Appelbaum,et al.  Solar radiation on Mars. Update 1991 , 1990 .

[8]  R. Todd Clancy,et al.  A new look at dust and clouds in the Mars atmosphere: analysis of emission-phase-function sequences from global viking IRTM observations , 1991 .

[9]  Ronald Greeley,et al.  Martian aeolian processes, sediments, and features. , 1992 .

[10]  J. Pollack,et al.  Properties and effects of dust particles suspended in the Martian atmosphere , 1979 .

[11]  James B. Pollack,et al.  Viking Lander image analysis of Martian atmospheric dust , 1995 .

[12]  J. Pollack,et al.  Dynamics of the atmosphere of Mars , 1992 .

[13]  Raymond E. Arvidson,et al.  On The spectral reflectance properties of materials exposed at the Viking landing sites , 1987 .

[14]  Hugh H. Kieffer,et al.  Quasi-periodic climate change on Mars. , 1992 .

[15]  Cary R. Spitzer,et al.  Physical properties of the surface materials at the Viking landing sites on Mars , 1987 .

[16]  Richard W. Zurek,et al.  The martian dust cycle. , 1992 .