Abundances; ExoMars ESA mission; Mars, atmosphere; NOMAD instrument; Radiative transfer; ExoMars; High-resolution spectrometer; Methane concentrations; Parts per trillion; Radiometric model; Solar occultation; Visible spectrometers; Astronomy and Astrophysics; Space and Planetary Science
Abstract :
[en] NOMAD (Nadir and Occultation for MArs Discovery) is one of the four instruments on board the ExoMars Trace Gas Orbiter, scheduled for launch in March 2016. It consists of a suite of three high-resolution spectrometers - SO (Solar Occultation), LNO (Limb, Nadir and Occultation) and UVIS (Ultraviolet and Visible Spectrometer). Based upon the characteristics of the channels and the values of Signal-to-Noise Ratio obtained from radiometric models discussed in (Vandaele et al., 2015a, 2015b; Thomas et al., 2016), the expected performances of the instrument in terms of sensitivity to detection have been investigated. The analysis led to the determination of detection limits for 18 molecules, namely CO, H 2 O, HDO, C 2 H 2 , C 2 H 4 , C 2 H 6 , H 2 CO, CH 4 , SO 2 , H 2 S, HCl, HCN, HO 2 , NH 3 , N 2 O, NO 2 , OCS, O 3 . NOMAD should have the ability to measure methane concentrations < 25 parts per trillion (ppt) in solar occultation mode, and 11 parts per billion in nadir mode. Occultation detections as low as 10 ppt could be made if spectra are averaged (Drummond et al., 2011). Results have been obtained for all three channels in nadir and in solar occultation.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Robert, S.; Belgian Institute for Space Aeronomy, Brussels, Belgium
Vandaele, A.C.; Belgian Institute for Space Aeronomy, Brussels, Belgium
Thomas, I.; Belgian Institute for Space Aeronomy, Brussels, Belgium
Willame, Y.; Belgian Institute for Space Aeronomy, Brussels, Belgium
Daerden, F.; Belgian Institute for Space Aeronomy, Brussels, Belgium
Delanoye, S.; Belgian Institute for Space Aeronomy, Brussels, Belgium
Depiesse, C.; Belgian Institute for Space Aeronomy, Brussels, Belgium
Drummond, R.; Belgian Institute for Space Aeronomy, Brussels, Belgium ; IndoSpace Ltd, Abingdon, United Kingdom
Neefs, E.; Belgian Institute for Space Aeronomy, Brussels, Belgium
Neary, L.; Belgian Institute for Space Aeronomy, Brussels, Belgium
Ristic, B.; Belgian Institute for Space Aeronomy, Brussels, Belgium
Mason, J.; Open University, United Kingdom
Lopez-Moreno, J.-J.; Instituto de Astrofisica de Andalucia CSIC, Granada, Spain
Rodriguez-Gomez, J.; Instituto de Astrofisica de Andalucia CSIC, Granada, Spain
Patel, M.R.; Open University, United Kingdom ; Rutherford Appleton Laboratory, Harwell, United Kingdom
Bellucci, G.; Istituto di Astrofisica e Planetologia Spaziali, Roma, Italy
Patel, M.
Allen, M.
Altieri, F.
Aoki, S.
Bolsée, D.
Clancy, T.
Cloutis, E.
Fedorova, A.
Formisano, V.
Funke, B.
Fussen, D.
Garcia-Comas, M.
Geminale, A.
Gérard, Jean-Claude ; Université de Liège - ULiège > Département d'astrophysique, géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)
FP7 - 607177 - CROSS DRIVE - Collaborative Rover Operations and Planetary Science Analysis System based on Distributed Remote and Interactive Virtual Environments
Name of the research project :
ESA Prodex Office “Interuniversity Attraction Poles” programme Planet TOPERS BRAIN
Funders :
BELSPO - Belgian Federal Science Policy Office [BE] EU - European Union [BE] UK Space Agency [GB]
Funding text :
NOMAD has been made possible thanks to funding by the Belgian Science Policy Office (BELSPO) and financial and contractual coordination by the ESA Prodex Office (PlanetADAM no 4000107727) . The research was performed as part of the “Interuniversity Attraction Poles” programme financed by the Belgian Government (Planet TOPERS no P7-15) and a BRAIN Research Grant BR/143/A2/SCOOP . The research leading to these results has received funding from the European Community׳s Seventh Framework Programme ( FP7/2007-2013 ) under Grant Agreement no. 607177 CrossDrive. UK funding is acknowledged under the UK Space Agency Grant ST/I003061/1 .
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