Albedo and photometric study of Mars with the Planetary Fourier Spectrometer on-board the Mars Express mission

Details Albedo and photometric study of Mars with the Planetary Fourier Spectrometer on-board the Mars Express mission Albedo and photometric study of Mars with the Planetary Fourier Spectrometer on-board the Mars Express mission

Feb 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007icar..186..527e&link_type=abstract

Icarus, Volume 186, Issue 2, p. 527-546.

Physics

2

Scientific paper

The Short Wavelength Channel of the Planetary Fourier Spectrometer (PFS) covers the 8333-1750 cm-1 (1.2-5.7 μm) spectral range, that is well suited to study the reflectance properties of the martian soil. These properties vary with time due to the dust dynamics in the martian environment. Wind can blow off dust exposing soil and fresh rocks and can support grain mobility inducing local dust settling. We have analyzed PFS data from January 2004 to April 2005. A detailed photometric study of the radiance acquired from the planet has been performed in order to compare correctly measurements obtained at different viewing geometries and to produce a mosaic image of the planet. The results show good agreement with data from the Thermal Emission Spectrometer (on-board NASA Mars Global Surveyor orbiter), although some variations are observed. Some albedo changes could be due to small to medium scale dust storms. A very accurate estimation of the limb-darkening parameter has been computed from the analyzed data. The obtained values are compared with a surface roughness and a thermal inertia map in order to assess the relation between the limb-darkening parameter and the physical properties of surface.

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