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The Planetary Fourier Spectrometer ( PFS ) for Mars Express

optimised for atmospheric studies, covering the IR range of 1.2-45 μm in two channels. The apodised spectral resolution is 2 cm, while the sampling is 1 cm. The FOV is about 2o for the short wavelength (SW) channel and 4o for the long wavelength (LW) channel, corresponding to spatial resolutions of 10 km and 20 km, respectively, from an altitude of 300 km. PFS will also provide unique data on the surface-atmosphere interaction and the mineralogical composition of the surface. It will be the first Fourier spectrometer covering 1-5 μm to orbit the Earth or Mars. The experiment has real-time onboard Fast Fourier Transform (FFT) in order to select the spectral range of interest for data transmission to ground. Measurement of the 15-μm CO2 band is very important. Its profile gives, via a complex temperature-profile retrieval technique, the vertical pressure temperature relation, which is the basis of the global atmospheric study. The SW channel uses a PbSe detector cooled to 200-220K, while the LW channel is based on a pyroelectric (LiTaO3) device working at room temperature. The interferogram is measured at every 150 nm displacement step of the corner cube retroreflectors (corresponding to 600 nm optical path difference) via a laser

P. Baldetti | P. Orleanski | D. Patsaev | F. Esposito | B. Saggin | A. Mattana | E. Lellouch | M. T. Capria | V. Formisano | R. Orfei | E. Palomba | M. Rataj | F. Angrilli | G. Piccioni | G. Bianchini | G. Chionchio | I. Khatuntsev | V. Orofino | F. Nespoli | D. Grassi | A. Marten | M. I. Blecka | A. Maturilli | T. Encrenaz | A. Blanco | F. Capaccioni | P. Cerroni | A. Coradini | D. Biondi | E. Mencarelli | M. Giuranna | M. Rossi | M. Maggi | A. Di Lellis | S. Fonti | L. Colangeli | V. Moroz | L. Zasova | N. Ignatiev | B. Moshkin | A. Ekonomov | A. Grigoriev | V. Nechaev | A. Kiselev | Y. Nikolsky | V. Gnedykh | D. Titov | M. Malgoska | A. Jurewicz | H. Hirsh | G. Arnold | J. Lopez Moreno | S. Atreya | P. Gobbi

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