The Atmospheric Chemistry Suite (ACS) of Three Spectrometers for the ExoMars 2016 Trace Gas Orbiter

Oleg Korablev (1) , Franck Montmessin (2) , Alexander Trokhimovskiy (1) , Anna A. Fedorova (1) , A. V. Shakun (1) , A. V. Grigoriev (1) , B. E. Moshkin (1) , N. I. Ignatiev (1) , François Forget (3) , Franck Lefèvre (2) , K. Anufreychik (1) , I. Dzuban (1) , Y. S. Ivanov (4) , Y. K. Kalinnikov (5) , T. O. Kozlova (1) , A. Kungurov (1) , V. Makarov (1) , F. Martynovich (1) , I. Maslov (1) , D. Merzlyakov (1) , P. P. Moiseev (6) , Y. Nikolskiy (1) , A. Patrakeev (1) , D. Patsaev (1) , A. Santos-Skripko (1) , O. Sazonov (1) , N. Semena (1) , A. Semenov (1) , V. Shashkin (1) , A. Sidorov (6) , A. V. Stepanov (1, 7) , I. Stupin (1) , D. Timonin (1) , A. Y. Titov (1) , A. Viktorov (6) , A. Zharkov (1) , F. Altieri (8) , G. Arnold (9) , D. A. Belyaev (1) , Jean-Loup Bertaux (2, 1) , D. S. Betsis (1) , N. Duxbury (7) , Thérèse Encrenaz (10) , Thierry Fouchet (10) , Jean-Claude Gérard (11) , D. Grassi (8) , Sandrine Guerlet (3) , P. Hartogh (12) , Y. Kasaba (13) , Igor V. Khatuntsev (1) , V. A. Krasnopolsky (14, 15) , R. O. Kuzmin (1, 16) , Emmanuel Lellouch (10) , M. A. Lopez-Valverde (17) , M. Luginin (1) , Anni Määttänen (2) , Emmanuel Marcq (2) , J. Martin Torres (18, 19) , A. S. Medvedev (12) , E. Millour (3) , Kevin Olsen (2) , M. R. Patel (20) , C. Quantin-Nataf (21) , Valérie Wilquet (22) , A. V. Rodin (1, 14) , V. I. Shematovich (23) , Ian Thomas (22) , Nicholas Thomas (24) , L. Vazquez (25) , Mathieu Vincendon (26) , C.F. Wilson (27) , L.V. Zasova (1) , L.M. Zelenyi (1) , M. P. Zorzano (18, 28)

1 IKI - Space Research Institute of the Russian Academy of Sciences
2 PLANETO - LATMOS
3 LMD - Laboratoire de Météorologie Dynamique (UMR 8539)
4 MAO - Main Astronomical Observatory of NAS of Ukraine
5 VNIIFTRI - National Research Institute for Physical-technical and Radiotechnical Measurements
6 Scientific Production Enterprise Astron Electronics
7 Faculty of Physics [MSU, Moscow]
8 IAPS - Istituto di Astrofisica e Planetologia Spaziali - INAF
9 DLR - Deutsches Zentrum für Luft- und Raumfahrt [Berlin]
10 LESIA (UMR_8109) - Laboratoire d'études spatiales et d'instrumentation en astrophysique
11 LPAP - Laboratoire de Physique Atmosphérique et Planétaire
12 MPS - Max-Planck-Institut für Sonnensystemforschung = Max Planck Institute for Solar System Research
13 Tohoku University [Sendai]
14 MIPT - Moscow Institute of Physics and Technology [Moscow]
15 Catholic University of America
16 GEOKHI - Vernadsky Institute of Geochemistry and Analytical Chemistry
17 IAA - Instituto de Astrofísica de Andalucía
18 Department of Computer Science [Kiruna]
19 IACT - Instituto Andaluz de Ciencias de la Tierra
20 OU - The Open University [Milton Keynes]
21 LGL-TPE - Laboratoire de Géologie de Lyon - Terre, Planètes, Environnement
22 BIRA-IASB - Belgian Institute for Space Aeronomy / Institut d'Aéronomie Spatiale de Belgique
23 INASAN - Institute of Astronomy of the Russian Academy of Sciences
24 UNIBE - Universität Bern / University of Bern
25 Facultad de Informática [Madrid]
26 IAS - Institut d'astrophysique spatiale
27 Department of Physics [Oxford]
28 CAB - Centro de Astrobiologia [Madrid]

The Atmospheric Chemistry Suite (ACS) package is an element of the Russian contribution to the ESA-Roscosmos ExoMars 2016 Trace Gas Orbiter (TGO) mission. ACS consists of three separate infrared spectrometers, sharing common mechanical, electrical, and thermal interfaces. This ensemble of spectrometers has been designed and developed in response to the Trace Gas Orbiter mission objectives that specifically address the requirement of high sensitivity instruments to enable the unambiguous detection of trace gases of potential geophysical or biological interest. For this reason, ACS embarks a set of instruments achieving simultaneously very high accuracy (ppt level), very high resolving power (>10,000) and large spectral coverage (0.7 to 17 μm—the visible to thermal infrared range). The near-infrared (NIR) channel is a versatile spectrometer covering the 0.7–1.6 μm spectral range with a resolving power of ∼20,000. NIR employs the combination of an echelle grating with an AOTF (Acousto-Optical Tunable Filter) as diffraction order selector. This channel will be mainly operated in solar occultation and nadir, and can also perform limb observations. The scientific goals of NIR are the measurements of water vapor, aerosols, and dayside or night side airglows. The mid-infrared (MIR) channel is a cross-dispersion echelle instrument dedicated to solar occultation measurements in the 2.2–4.4 μm range. MIR achieves a resolving power of >50,000. It has been designed to accomplish the most sensitive measurements ever of the trace gases present in the Martian atmosphere. The thermal-infrared channel (TIRVIM) is a 2-inch double pendulum Fourier-transform spectrometer encompassing the spectral range of 1.7–17 μm with apodized resolution varying from 0.2 to 1.3 cm⁻¹. TIRVIM is primarily dedicated to profiling temperature from the surface up to ∼60 km and to monitor aerosol abundance in nadir. TIRVIM also has a limb and solar occultation capability. The technical concept of the instrument, its accommodation on the spacecraft, the optical designs as well as some of the calibrations, and the expected performances for its three channels are described.

Mots clés: High-resolution spectrometer; Cross-dispersion; Echelle; Mars; Atmosphere; Fourier-spectrometer

Domaines: Physique de l'espace [physics.space-ph]; Astrophysique [astro-ph]

Oleg Korablev, Franck Montmessin, Alexander Trokhimovskiy, Anna A. Fedorova, A. V. Shakun, et al.. The Atmospheric Chemistry Suite (ACS) of Three Spectrometers for the ExoMars 2016 Trace Gas Orbiter. Space Science Reviews, 2018, 214, pp.7. ⟨10.1007/s11214-017-0437-6⟩. ⟨insu-01656380⟩