Structure of the Martian soil from optical and infrared observations

Details Structure of the Martian soil from optical and infrared observations Structure of the Martian soil from optical and infrared observations

Jan 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976kosis..14...85m&link_type=abstract

Kosmicheskie Issledovaniia, vol. 14, Jan.-Feb. 1976, p. 85-96. In Russian.

Computer Science

Infrared Reflection, Mars Surface, Optical Reflection, Soil Mapping, Albedo, Infrared Radiometers, Particle Size Distribution, Permittivity, Planetary Temperature

Scientific paper

A rough model of the surface layer of the Martian soil is developed which can explain the reflection spectrum and thermal properties of the soil. Note is taken of the previously established fact that the surface layer is broken up. The reflection spectrum in the wavelength region from 0.2 to 6 microns is analyzed, and the dependence of the geometric and normal albedo on wavelength is determined. The spectrum is compared with typical reflection spectra of terrestrial ejecta, the average particle diameter is estimated, and the structure of the soil as shown in IR radiometer data is discussed. It is shown that the reflection spectrum and thermal properties of the Martian soil are consistent with a model in which: (1) the soil consists of crushed igneous rocks, basement as well as intermediate, with a small admixture of goethite; (2) the rocks composing the continental soil are more acidic than those of the mare soil; (3) the soil contains two types of particles, relative large ones (tenths of a millimeter) and micron-sized ones; (4) the average density of the soil is about 1.2 g/cu cm at depths of 2 to 4 cm; and (5) the porosity is about 0.6.

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