Studying methane and other trace species in the Mars atmosphere using a SOIR instrument |
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| Authors: | R Drummond A-C Vandaele F Daerden D Fussen A Mahieux L Neary E Neefs S Robert Y Willame V Wilquet |
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| Institution: | 1. Research and Scientific Support Dept., ESA/ESTEC, Noordwijk, Netherlands;2. Arkansas Center for Space and Planetary Sciences, University of Arkansas, Fayetteville, AR 72701;3. Space Physics Research Laboratory, University of Michigan, Ann Arbor, MI 48109-2143, USA;4. Department of Physics, University of California, Berkeley, CA94720, USA;1. Université Versailles St-Quentin; Sorbonne Universités, UPMC Univ. Paris 06; CNRS/INSU, LATMOS-IPSL, 11 bd d’Alembert 78280 Guyancourt, France;2. Sorbonne Universités, UPMC Univ. Paris 06; CNRS/INSU, LMD-IPSL, 4 Place Jussieu, 75252 Paris Cedex 05, France;3. Sorbonne Universités, UPMC Univ. Paris 06; Université Versailles St-Quentin; CNRS/INSU, LATMOS-IPSL, 4 Place Jussieu, 75252 Paris Cedex 05, France;1. AGH University of Science and Technology, Faculty of Geology, Geophysics and Environmental Protection, Department of Mineralogy, Petrography and Geochemistry, al. Mickiewicza 30, 30-059 Kraków, Poland;2. Polish Academy of Sciences, Institute of Geological Sciences, ul. Senacka 1, 30-063 Kraków, Poland;1. InstitutoAndaluz de Ciencias de la Tierra, Campus de Fuentenueva s/n, 18002 Granada, Spain;2. Materials Research Laboratory, University of Nova Gorica, Vipavska 11C, 5270 Ajdovscina, Slovenia;3. Instituto de Astrofísica de Andalucía CSIC, Granada 18008, Spain |
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| Abstract: | Solar Occultation in the InfraRed (SOIR) is one of three spectrometers of the SPICAV/SOIR instrument suite (Bertaux et al., 2007b) on board the Venus Express orbiter (VEX). VEX has been in orbit around Venus since April 2006 and to date SOIR has carried out over 674 measurements. Pre-launch and in-orbit performance analyses allow us to predict what SOIR would be capable of at Mars. SOIR spectra through the Martian atmosphere have been simulated with ASIMUT, a line-by-line (LBL) radiative transfer code also used for the retrieval of vertical profiles of atmospheric constituents of Venus (Vandaele et al., 2008, Bertaux et al., 2007a). The code takes into account the temperature and pressure vertical profiles as well as those of the atmospheric species, but also the instrument function and the overlapping of the diffraction orders of the echelle grating. We will show these spectra and the detection limits of species that could be studied using a SOIR spectrometer making solar occultation or nadir measurements in Mars orbit. |
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