From Event: SPIE Optical Engineering + Applications, 2017
Fourier-spectrometer TIRVIM is a part of ACS spectral complex aboard Mars-Express orbiter spacecraft. TIRVIM spectral range is 2–16 micron. It can operate as a spectrometer – with the Sun as a standard radiation source (“occultation” mode) or as a spectro-radiometer (“nadir” mode). In occultation mode the spectral resolution is 0.2 cm-1, in nadir mode – 1.3 cm-1. The main scientific objective of the occultation mode is to search for atmosphere minor constituents, of the nadir mode – to monitor the Mars atmosphere vertical thermal profile (by 15-micron CO2 band). The occultation mode is self-calibrated. For absolute calibration in the nadir mode TIRVIM has a rotating inlet flat mirror (single-axis foreoptic) able to point the FOV (2º) to nadir, space, built-in black-body or to another direction in the plane. TIRVIM mass is 12 kg, the power consumption is 15 W.
Alexei V. Grigoriev, Alexey Shakun, Boris E. Moshkin, Dmitry V. Patsaev, Alexander V. Zharkov, Victor Shashkin, Andrey S. Kungurov, Alexander Santos-Skripko, Fedor G. Martynovich, Igor A. Stupin, Dmitry Merzlyakov, Vladislav Makarov, Oleg Sazonov, Yuryi Nikolskyi, Nikolai I. Ignatiev, Igor A. Maslov, Dmitry Gorinov, Elena Efremenkova, Alexander Terentiev, Oleg Korablev, and Gabriele E. Arnold, "Fourier spectrometer TIRVIM/ACS aboard ExoMars 16 orbiter (Conference Presentation)," Proc. SPIE 10403, Infrared Remote Sensing and Instrumentation XXV, 104030K (Presented at SPIE Optical Engineering + Applications: August 08, 2017; Published: 19 September 2017); https://doi.org/10.1117/12.2274751.5581335555001.
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