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Expected Performances of the NOMAD/ExoMars instrument

Robert, S.; Vandaele, A.C.; Thomas, I.; Willame, Y.; Daerden, F.; Delanoye, S.; Depiesse, C.; Drummond, R.; Neefs, E.; Neary, L.; Ristic, B.; Mason, J.; Lopez-Moreno, J.-J.; Rodriguez-Gomez, J.; Patel, M. R.; Bellucci, G. and the NOMAD Team (2016). Expected Performances of the NOMAD/ExoMars instrument. Planetary And Space Science (Early View).

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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., Optics Express, 2015] and [Thomas et al., Optics Express, 2015], 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, H2O, HDO, C2H2, C2H4, C2H6, H2CO, CH4, SO2, H2S, HCl, HCN, HO2, NH3, N2O, NO2, OCS, O3. 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., Planetary Space and Science, 2011]. Results have been obtained for all three channels in nadir and in solar occultation.

Item Type: Journal Item
Copyright Holders: 2016 Elsevier
ISSN: 0032-0633
Project Funding Details:
Funded Project NameProject IDFunding Body
NOMADNot SetESA Prodex Office
Interuniversity Attraction PolesNot SetPlanet TOPERS
Interuniversity Attraction PolesBR/143/A2/SCOOPBRAIN
Seventh Framework ProgrammeFP7/2007-2013European Community
Not SetST/I003061/1UK Space Agency
Keywords: ExoMars ESA mission; NOMAD instrument; Mars; atmosphere; Abundances; Radiative transfer
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 45619
Depositing User: Manish Patel
Date Deposited: 17 Mar 2016 10:46
Last Modified: 03 May 2019 06:39
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