Composition of the Martian aerosols through near-IR spectroscopy

Details Composition of the Martian aerosols through near-IR spectroscopy Composition of the Martian aerosols through near-IR spectroscopy

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993lpi....24..445e&link_type=abstract

In Lunar and Planetary Inst., Twenty-fourth Lunar and Planetary Science Conference. Part 1: A-F p 445-446 (SEE N94-12015 01-91)

Computer Science

Aerosols, Dust, Imaging Spectrometers, Infrared Spectroscopy, Mars Atmosphere, Planetary Composition, Spectrum Analysis, Absorption Spectra, Infrared Reflection, Mars Surface, Mineralogy, Near Infrared Radiation, Opacity, Pixels, Wave Scattering

Scientific paper

Near-infrared spectroscopy is a powerful technique to study the composition of planetary surfaces, as the main minerals exhibit absorption bands in this spectral range. It gave important information on the mineralogy and petrology of Mars in the past twenty years although in this case it is well known that a large fraction of light is scattered by the airborne particles before reaching the surface. The measured signal is thus the sum of two different contributions that should be studied separately: One from the surface and one from the aerosols that depends on their density, size distribution and composition. Data from the ISM imaging spectrometer are used here to derive the aerosols spectrum. They consist in sets of spectra (from 0.76 to 3.16 microns) of approximately 3000 pixels approximately 25x25 sq km in size. The resulting spectrum exhibits both water-ice and clay mineral features superimposed on a scattering continuum.

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