Optical and radiometric models of the NOMAD instrument Part II: The infrared channels - SO and LNO

NOMAD Team

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

NOMAD is a suite of three spectrometers that will be launched in 2016 as part of the joint ESA-Roscosmos ExoMars Trace Gas Orbiter mission. The instrument contains three channels that cover the IR and UV spectral ranges and can perform solar occultation, nadir and limb observations, to detect and map a wide variety of Martian atmospheric gases and trace species. Part I of this work described the models of the UVIS channel; in this second part, we present the optical models representing the two IR channels, SO (Solar Occultation) and LNO (Limb, Nadir and Occultation), and use them to determine signal to noise ratios (SNRs) for many expected observational cases. In solar occultation mode, both the SO and LNO channel exhibit very high SNRs >5000. SNRs of around 100 were found for the LNO channel in nadir mode, depending on the atmospheric conditions, Martian surface properties, and observation geometry.

Original languageEnglish
Pages (from-to)3790-3805
Number of pages16
JournalOptics Express
Volume24
Issue number4
DOIs
Publication statusPublished - 2016 Feb 22

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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