Berlin 2005 – wissenschaftliches Programm

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EP: Extraterrestrische Physik

EP 16: Mars II

EP 16.6: Vortrag

Mittwoch, 9. März 2005, 11:30–11:45, TU BH349

Emissivity Spectra of Planetary Analog Materials: a Key for the Interpretation of Remote Sensing Measurements — •Alessandro Maturilli1,2, Andreas Witzke1, Ljuba Moroz1, Gabriele Arnold1, Jörn Helbert1, and Christoph Wagner31DLR — 2IFSI, Rome, Italy — 3DLR (retired)

Reflection and emission spectra of planetary surfaces contain extensive information on the surface properties and in particular on mineralogical composition. The compositional information is provided by diagnostic mineral absorption features affected by their composition and structure. To interpret features of planetary spectra in a right way, it is essential to study the spectral behavior of terrestrial analog materials using laboratory measurements. We present here a device that enables us to measure emissivity spectra of analog materials in the mid-infrared wavelength region. We have collected spectra of various rock-forming minerals relevant for surfaces of terrestrial planets. To study the important influence of grain size on the spectra, different grain size fractions of the materials have been prepared ranging from coarse to very fine grains. In addition, spectra of mineral mixtures have been measured to investigate the opportunity to apply a linear deconvolution method using the end-member minerals.

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