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A Martian PFS average spectrum: Comparison with ISO SWS |
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| Authors: | V Formisano T Encrenaz M Giuranna H Hirsh N Ignatiev E Lellouch V Moroz G Piccioni B Saggin |
| Institution: | a Istituto di Fisica dello Spazio Interplanetario INAF-IFSI, Via del Fosso del Cavaliere 100, 00133 Roma, Italy b Laboratoire d’Etudes Spatiales et d’Instrumentation en Astrophysique (LESIA), Observatoire de Paris 5 Place Janssen, 92195 Meudon, France c Dipartimento di Fisica Via Arnesano, Universita’ degli Studi di Lecce, 73100 Lecce, Italy d German Aerospace Center (DLR), Optical Information System, Rutherfordstreet 2, D-12489 Berlin, Germany e Space Research Institute of Russian Academy of Sciences (IKI), Profsojuznaja 84/32, 117997 Moscow, Russia f Space Research Center of Polish Academy of Sciences (SRC PAS), Bartycka 18A, 00716 Warsaw, Poland g Istituto Astrofisica Spaziale INAF-IASF, Via Fosso del Cavaliere 100, 00133 Roma, Italy h Universita’ di Milano, Dipartimento di Meccanica, sede di Lecco, Italy |
| Abstract: | The evaluation of the planetary Fourier spectrometer performance at Mars is presented by comparing an average spectrum with the ISO spectrum published by Lellouch et al. 2000. Planet. Space Sci. 48, 1393.]. First, the average conditions of Mars atmosphere are compared, then the mixing ratios of the major gases are evaluated. Major and minor bands of CO2 are compared, from the point of view of features characteristics and bands depth. The spectral resolution is also compared using several solar lines. The result indicates that PFS radiance is valid to better than 1% in the wavenumber range 1800-4200 cm−1 for the average spectrum considered (1680 measurements). The PFS monochromatic transfer function generates an overshooting on the left-hand side of strong narrow lines (solar or atmospheric). The spectral resolution of PFS is of the order of 1.3 cm−1 or better. A large number of narrow features to be identified are discovered. |
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