Martian atmospheric particulate spectral end-members recovery from PFS and IRIS data |
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| Authors: | Mario D’Amore Alessandro Maturilli Angelo Zinzi Ernesto Palomba Jörn Helbert |
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| Institution: | 1. DLR, Institute of Planetary Research, Rutherfordstraße 2, 12489 Berlin, Germany;2. INAF-OAR, Via Frascati 33, 00040 Monte Porzio Catone (RM), Italy;3. ASDC, Via Galileo Galilei, 00044 Frascati (RM), Italy;4. INAF-IAPS, Via del Fosso del Cavaliere 100, 00133 Roma, Italy |
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| Abstract: | We present an application of a multivariate analyses technique on data returned by the Planetary Fourier Spectrometer (PFS) instrument on board the ESA’s Mars Express (MEX) spacecraft in order to separate the atmospheric contribution from the observed radiation. We observe that Thermal/Far Infrared spectra returned from Mars, covering almost a whole martian year, can be represented by a linear model using a limited set of end-member spectra. We identify the end-members as the suspended mineral dust and water ice clouds, but no surface signature was found. We improve previous studies performed with data from the Thermal Emission Spectrometer (TES) thanks to the higher spectral resolution of PFS. This allows for distinguishing narrow gaseous bands present in the martian atmosphere. Furthermore, the comparison of results from PFS and TES with data collected in 1971 by the Mariner 9 Infrared Interferometer Spectrometer (IRIS) shows an atmospheric dust component with similar spectral behavior. This might indicate homogeneity of the dust source regions over a time period of more than 30 years. |
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| Keywords: | Mars Mars atmosphere Spectroscopy |
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